Back , Main menu , PSLC In 1839 Charles Goodyear invented a process called vulcanization, which made rubber more durable and more useful at hot and cold temperatures. Vulcanization crosslinks rubber. That is, it ties all the chainlike rubber molecules together to form one big molecule. This does a lot for the rubber, but it can also make rubber difficult to process. Think about it. A material made of one molecule cant really flow into a mold, and it cant be shaped or worked very easily. A material made of crosslinked rubber has to be shaped before it is crosslinked. Crosslinking also makes rubber difficult to recycle. Some kinds of synthetic rubber arent crosslinked, however. They can be molded and remolded again and again. They are called thermoplastic elastomers. Thermo- means heat, and plastic means moldable. Elastomer is just a fancy word that means rubber. So a thermoplastic elastomer is a rubber that can be molded when it is heated. While it is wonderful that thermoplastic ...
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en] We investigate the microscopic morphology of thin films of symmetric triblock copolymers synthesized via a two-step living radical polymerization of n-butylacrylate and methyl methacrylate. These copolymers with low poly(methyl methacrylate) contents constitute a new class of potential thermoplastic elastomers with higher service temperature and oxidation resistance compared to conventional polydiene−polystyrene-based thermoplastic elastomers. The straightforward synthetic pathway allows for strict control of molecular weight, molecular-weight distribution, and composition. The presence in the copolymer of immiscible segments covalently bound to each other leads to phase separation on the nanometer scale. Regular organization of the phase-separated nanodomains is observed in real space by scanning force microscopy. The data point to a strong contrast in the local mechanical properties, corresponding to the microphase morphology. Cylinders of the minority phase are found to orient ...
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Global demand for thermoplastic elastomers (TPEs) will grow 6.3 percent annually through 2011, as they continue to replace natural and synthetic rubber, rigid thermoplastics and metal. China will gain market share but the US will remain the top producer of some products such as olefinic-based TPEs. This study analyzes the $10.4 billion world TPE industry. It presents historical demand data for 1996, 2001 and 2006 and forecasts for 2011 and 2016 by type (e.g., styrenic block copolymers, thermoplastic polyolefins, thermoplastic polyurethanes, thermoplastic vulcanizates, copolyester elastomers); market (e.g., motor vehicles, industrial products, footwear, asphalt and bitumen modification); world region and for 16 countries. The study also considers market environment factors, details industry structure, evaluates company market share and profiles 38 major producers, including Kraton Polymers, AES, Dow Chemical, Sinopec, LeeChang Yung, BASF, Repsol, and Lubrizol.
Pneumatic rubber tire with a tread composed of a rubber blend of a base of at least two synthetic elastomers composed of (i) specialized isoprene/butadiene copolymer elastomer having a low Tg in a range of about -70 to about -100 C. and (ii) a diene based elastomer having a Tg in a range of about -5 to about -30 C. together with a minor amount of natural cis 1,4-polyisoprene rubber. Selection of the base of the said two synthetic elastomers having spaced apart, or spatially defined, Tgs of at least 40 C. is an important feature of the tread rubber blend. Representative examples of contemplated elastomers with Tgs in a range of about -5 to about -30 C. are 3,4-polyisoprene elastomer, styrene/isoprene copolymer elastomer and high vinyl polybutadiene elastomers. In one aspect, the tread rubber blend is reinforced with reinforcing filler composed of carbon black or a combination of carbon black and silica accompanied by a coupling agent.
The thermoplastic elastomers (TPE) market comprises segments including styrene block copolymer (SBC), thermoplastic polyolefin (TPO), thermoplastic vulcanizate (TPV), thermoplastic polyurethane (TPU), copolyester elastomer (COPE), and poly ether block ami
Thermoplastic elastomer (TPE) material combine the dynamic processing properties of thermoplastic plastics with the softness and flexibility of elastomers.
Explore different chemistries of thermoplastic elastomers (TPEs) that are bridging the gap between elastomers and thermoplastics thereby providing multiple service properties & end-use applications.
This invention relates to a composition comprising a polybutadiene rubber containing a polymer obtained by block or graft polymerization of cis-1,4-polybutadiene with syndiotactic (syn)-1,2-polybutadiene, alone or blended with the other diene rubber, said syn-1,2-polybutadiene being crystallized and in a short fiber-like shape, and a breaking resistance characteristic and reinforcement characteristic being considerably improved by specifying the diameter and length of said short fiber, which is suitable for various parts of tire or industrial materials, and further relates to a composition of said polybutadiene rubber to which a carbon black is added for preferably used as a chafer or tread of tire, and still further relates to said composition to which a carbon black and an antioxidant are added for preferably used as a rubber blend composition for side wall.
Thermoplastic elastomer compositions of the present invention comprise a blend of from about 10 to about 50 parts by weight of a crystalline 1-olefin polymer, from about 80 to about 15 parts by weight of a styrene-butadiene rubber, and from about 5 to about 50 parts by weight of bitumen. The thermoplastic blends have unexpectant increases in properties, especially tear strength, tensile strength, high temperature (100 C.) tear strength, and smooth surfaces when injection molded. Moreover, the bitumen lowers the injection molding pressure, thus enabling larger parts to be molded. The compositions, which may be partially cured, also have excellent aging properties. The compositions are a true thermoplastic in that they can be repeatedly processed and yet maintain their good physical properties.
RTP Company can support your medical device development needs from virtually every angle. Not only do we provide standard products that are pre-tested to ISO 10993 biocompatibility standards, but we also offer custom and highly functionalized TPEs that are formulated to dissipate static electricity, provide radiopacity, and/or lower sliding friction force.. At RTP Company, we have structured our TPE product line to give the medical device design engineer ultimate flexibility. Our line of standard products provides time-tested performance in an array of devices, while our experienced R&D group is able to custom formulate unique TPE alloys and incorporate functional additives in support of your most demanding product developments.. For more information, view our innovation bulletin on Thermoplastic Elastomers for Medical Devices…. View Innovation Bulletin View alternative languages of this brochure: ...
Chemical Resistance, Volume 2: Thermoplastic Elastomers Thermosets and Rubbers, 9781282013483, available at Book Depository with free delivery worldwide.
/PRNewswire/ -- The Innovative Technologies Steering the Global Thermoplastic Elastomers Market, 2026 report has been added to ResearchAndMarkets.coms...
One comprehensive volume holding an applicable knowledge of the chemistry, processing, and all properties, and uses of thermoplastic elastomers.
Segmented thermoplastic copolyester elastomers containing recurring polymeric long chain ester units derived from phthalic acids and long chain glycols and short chain ester units derived from phthalic acids and 1,4-butanediol or 1,4-butenediol. The elastomers also contain between about 0.1% and about 5% by weight of said copolyester of 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid triester with 1,3,5-tris-(2-hydroxyethyl)-s-triazine-2,4-6-(1H, 3H, 5H) trione.
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Polyurethanes combine the elastic properties of elastomers with the processability of thermoplastic materials. Seals made of polyurethanes provide excellent wear and pressure resistance and avoid leakage. Due to their elasticity and flexibility, they are easy to install. Special sealing polyurethane grades have a superior compression set and relaxation performance as well as temperature stability compared to commodity industrial grades ...
0046]The above thermoplastic elastomer composition is obtained by previously fusing and kneading the thermoplastic resin and the elastomer (uncured one in the case of rubber) by use of a biaxial kneader/extruder or the like, and thereby dispersing the elastomer component in the thermoplastic resin forming a continuous phase. When the elastomer component is cured, elastomer may be dynamically cured by adding a vulcanizing agent during the kneading. Additionally, although various compounding agents (other than a vulcanizing agent) may be added to the thermoplastic resin or elastomer component during the above kneading, it is preferable that these agents be previously mixed therein before the kneading. There is no particular limitation as to a kneader used for the kneading of the thermoplastic resin and the elastomer, and there can be listed a screw extruder, a kneader, a banbury mixer, and a biaxial kneader/extruder as examples of the kneader. For the purpose of kneading of the resin component and ...
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Kuraray Co., Ltd has introduced its range of Septon V thermoplastic elastomers, which it describes as hydrogenated styrene thermoplastic elastomers. Although the company does not specifically mention the abbreviation SEBS, Kraton has been selling hydrogenated styrenic elastomers using the SEBS acronym for many years. Kuraray said, Unlike earlier Septon products, the Septon V Series contains a crosslinkable hard block and makes it reactive. Kuraray has also developed special compounding technology which makes it possible to cross-link the hard block as well as the soft block…. ...
Thermoplastic Polyester Elastomer (TPEE) Market Thermoplastic Polyester Elastomer (TPEE) is a block copolymer who contains a hard segment of polyester and a soft segment of polyether; wherein the amorphous is formed from the soft segment of polyether and the uncrystallized polyester. Micro-crystals play a role as physical crosslinking points formed from the hard segment of…
1,3-Butadiene is used as an intermediate in the production of elastomers, polymers, and other chemicals. Of the 1,3-butadiene used in 1978, 44% was used to manufacture styrene-butadiene rubber (a substitute for natural rubber, produced by copolymerization of 1,3-butadiene with styrene), and 19% was used to produce polybutane elastomer (a substance that increases resistance of tire products to wear, heat degradation, and blowouts). Chloroprene monomer, derived from 1,3-butadiene, is used exclusively to manufacture neoprene elastomers for non-tire and latex applications. Commercial nitrile rubber, used largely in rubber hoses, seals, and gaskets for automobiles, is a copolymer of 1,3-butadiene and acrylonitrile. Acrylonitrile- butadiene- styrene resins, usually containing 20%-30% 1,3-butadiene by weight, are used to make parts for automobiles and appliances. Other polymer uses include specialty polybutadiene polymers, thermoplastic elastomers, nitrile barrier resins, and K resins®. 1,3-Butadiene ...
Global Polybutadiene Market to Reach $9. 5 Billion by 2027. Amid the COVID-19 crisis, the global market for Polybutadiene estimated at US$7. 3 Billion in the year 2020, is projected to reach a revised size of US$9.New York, July 31, 2020 (GLOBE NEWSWIRE) -- Reportlinker.com announces the release of the
Dive into the research topics of Fracture energies and tensile strength of an EPDM/PP thermoplastic elastomer. Together they form a unique fingerprint. ...
TABLE-US-00001 TABLE 1 Examples Comparative Examples 1 2 3 4 1 2 3 4 (A) Block Wt % 36.1 37.4 34.8 35.4 -- 45 30 30 terpolymer (A) Polyolefin- -- -- -- -- 100 -- -- -- based rubber (B) Paraffin oil 39.7 37.4 41.8 39.0 -- 30 30 25 (C) Polyolefin- 2.6 2.8 2.6 2.6 -- 10 20 10 based resin (D) Inorganic 10.8 11.2 10.4 12.4 -- 10 8 25 additive (E) Polyphenylene 10.8 11.2 10.4 10.6 -- 5 12 10 ether-based resin (F) Silicon-based Parts 0.35 0.4 0.35 0.35 -- -- -- -- resin by weight Surface hardness (shore A) 35 40 32 37 45 48 67 52 23° C. Tensile strength 66 65 59 63 85.0 40 115 35 (kgf/cm2) Elongation rate 834 821 848 841 890 750 800 450 (%) Permanent 1.5 2.1 1.4 2.1 1.3 4.0 7.0 6.0 elongation and extension rate 100° C. Tensile strength 14 12 10 14 15 14 35 8 (kgf/cm2) Elongation rate 452 333 343 456 380 430 500 350 (%) Permanent 8.6 7.2 7.3 9.2 6.9 12 15 20 elongation and extension rate ...
Summary of Facts and Submissions. I. Mention of the grant of European patent No. 0 698 054 in respect of European patent application No. 94 916 028.7, filed on 5 May 1994 as International application No. PCT/US94/05002 in the name of Supreme Corq, was announced on 17 April 2002 (Bulletin 2002/16).. II. The patent, entitled Molded Closure for a Liquid Container was granted with fifteen claims, Claim 1 reading as follows:. 1. A molded stopper for removable insertion into a wine bottle obtainable from a composition comprising a thermoplastic elastomer and a blowing agent, wherein the thermoplastic elastomer is at least one styrene block copolymer selected from a styrene-ethylene-butylene-styrene block copolymer (SEBS), a styrene-isoprene-styrene block copolymer (SIS), and a styrene-ethylene/propylene-styrene block copolymer (SEPS).. Claims 2 to 14 were, either directly or indirectly, dependent on Claim 1. Claim 15 was directed to a method of making the moulded stopper according to Claim 1 ...
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United States Patent @iiiice 3,018,302 Patented Jan. 23, 1962 NOVEL CYCLIC PHOSPHORIC ACID ESTER AMIDES, AND THE PRODUCTION THEREOF Herbert Arnold, Bielefeld, Norbert Brock, Wadersloh, and Friedrich Bourseaux, Bielefeld, Germany, assignors to Asta-Werke Aktiengesellschaft Chemische Fabrik, Brackwede, Germany No Drawing. Filed Apr. 15, 1958, Ser. No. 728,568 Claims priority, application Germany Feb. 10, 1956 9 Claims. (Cl. 260-461) This invention relates to novel cyclic phosphoric acid ester amides, and the production thereof. This application is a continuation-in-part of our copending patent application Serial No. 638,235, filed February 5, l957, entitled Novel cyclic phosphoric acid ester amides and the production thereof. For a number of years, compounds of the type of the so-called nitrogen mustard gas which conform to the following formula in which X is a halogen atom, preferably a chlorine atom, have found considerable medical interest for the treatment of malignant growths and similar ...
US. Cl. 260-75NH Claims ABSTRACT OF THE DISCLOSURE Polyurethane elastomers having improved hydrolytic stability are prepared from 4,4-methylene bis(cyclohexylisocyanate), neopentyl adipate polyester and an aromatic diamine. POLYURETHANE-UREA ELASTOMERIC COMPOSITIONS This invention relates to polyurethane elastomers, having improved hydrolytic stability, which are prepared from 4,4-methylene bis(cyclohexylisocyanate); neopenyl adipate polyester; and an aromatic diamine. It is known that polyurethane compositions can be prepared by chain-extending isocyanate-terminated prepolymers with a curing agent containing active hydrogen groups, such as a diamine, polyol, water and the like. The prepolymers are commonly prepared by condensation of a polyester or polyether with an excess of an aromatic diisocyanate. Where high performance elastomers are desired the preferred curing agents are aromatic diamines. However, the use of aromatic diamines presents a processing problem with many prepolymers. For ...
The invention relates to an electrically conductive elastomer mixture and to a method. The mixture comprises a thermoplastic styrene elastomer and, as an electrically conductive filler, metal-containing particles. The mixture further comprises a polymer which is an acid-grafted, acid-anhydride-grafted or acid-copolymer and which forms an IPN (Interpenetrating Polymer Network) network structure with the styrene elastomer.
The International workshop on Physics of Poly-Domain Liquid Crystalline Elastomers will be held on June 9-11, 2011, at 601, Pao Yue-Kong Library(North Gate Entrance) Shanghai Jiao Tong University, Shanghai, P.R. China. The physics of the poly-domain phase of liquid crystalline elastomers (LCE) has attracted strong interest from many of us for quite some time. In addition to their potential for technological applications, these systems pose fascinating fundamental questions about the statistical mechanics of amorphous solids that possess internal orientational order. In contrast to conventional (i.e., fluid) liquid crystals, within a nelastomer deformations of the LC order necessarily induce elastic strains in the solid itself. These would impose a large elastic energy cost on the system as a whole - as we would naively expect from our intuition about elastic solids. Regardless of our intuition, the LC order within a liquid crystalline elastomer, when cross-linked under isotropic conditions, ...
This invention concerns a method for the preparation of polyurea elastomers, comprising: (a) reacting an amine chain extender with dialkyl maleate to form an aspartic ester, wherein the chain extender has a molar amount of amine groups that is greater than the moles of dialkyl maleate; (b) blending the aspartic ester with one or more polyoxyalkyleneamines to prepare a resin blend; (c) contacting the resin blend with an isocyanate under conditions effective to form a polyurea elastomer. This invention concerns a method for the preparation of polyurethane elastomers, comprising: (a) reacting an diamine chain extender with dialkyl maleate or fumarate, wherein the mole ratio of primary amine functionality in the diamine chain extender to dialkyl maleate or fumarate is more than 1:1; (b) coating a substrate with effective film forming amounts of the product of step (a), an isocyanate, and a polyhydroxyl compound under conditions effective to form a the
The present invention is directed generally to the use of propylene-based elastomers in articles. The propylene-based elastomers have isotactic polypropylene crystallinity, a melting point by DSC of 110 C. or less, a heat of fusion of from 5 to 50 J/g, and comprise at least 75 wt % propylene-derived units, at least 6 wt % ethylene-derived units, and optionally diene-derived units. The present invention is also directed to processes for making articles comprising propylene-based elastomers.
For all practical purposes, the useful life of a plastic component is equal to its fatigue life under conditions of cyclic loading such as those that occur in vibration. Equally important to materials engineers and designers are abrasion, friction and wear-tribological properties. Over 80 generic families are covered including thermoplastics, thermosets, thermoplastic elastomers and rubbers. Neat resins, blends and alloys, plastics with various combinations of fillers, additives and more are covered. Also covers plastics mated to plastics and metals ...
In this work we present a new fabrication technique to print thin dielectric elastomer actuators (DEAs), reducing the driving voltage below 300 V while keeping good actuation performance. With operation voltages in the kV-range, standard DEAs are limited in terms of potential applications. Using thinner membranes is one of the few existing methods to achieve lower operation voltages. Typical DEAs have membranes in the 20-100 um range, values below which membrane fabrication becomes challenging and the membrane quality and uniformity degrade. Using pad printing we produced thin silicone elastomer membranes, on which we pad-printed compliant electrodes. We then fabricated DEAs by assembling two membranes back to back. We obtain an actuation strain of 7.5% at only 245 V on a 3 um thick DEA. In order to investigate the stiffening impact of the electrodes we developed a simple DEA model that includes their mechanical properties. We also developed a strain-mapping algorithm based on optical ...
TY - ABST. T1 - Glycerol-silicone elastomers as active membranes for wound dressings and beyond. AU - Mazurek, P.. AU - Brook, Michael A.. AU - Skov, A. L.. PY - 2018. Y1 - 2018. N2 - A green and cheap silicone-based elastomer has been developed.1,2 Through the simple mixing-in of biodiesel-originating glycerol into commercially available polydimethylsiloxane (PDMS) pre-polymer, a glycerol-in-silicone emulsion was produced. This counterintuitively stable mixture became a basis for obtaining elastomeric composites with uniformly distributed glycerol droplets. Various compositions, containing from 0 to 140 parts of glycerol per 100 parts of PDMS rubber by weight, were prepared and investigated in terms of mechanical properties as well as optical and scanning electron microscopy. The materials were proven additionally to exhibit a strong affinity to water, which was investigated by simple water absorption tests. Incorporating glycerol into PDMS decreased the Youngs modulus of the composites yet ...
An elastomer is a polymer with viscoelasticity (having both viscosity and elasticity) and very weak inter-molecular forces, generally having low Youngs modulus and high failure strain compared with other materials.[1] The term, which is derived from elastic polymer,[2] is often used interchangeably with the term rubber, although the latter is preferred when referring to vulcanisates.[3] Each of the monomers which link to form the polymer is usually made of carbon, hydrogen, oxygen or silicon. Elastomers are amorphous polymers existing above their glass transition temperature, so that considerable segmental motion is possible. At ambient temperatures, rubbers are thus relatively soft (E ≈ 3 MPa) and deformable. Their primary uses are for seals, adhesives and molded flexible parts. Application areas for different types of rubber are manifold and cover segments as diverse as tires, shoe soles, and damping and insulating elements. The importance of rubbers can be judged from the fact that global ...
Booktopia has Advances in Elastomers and Rubber Elasticity by Joginder Lal. Buy a discounted Hardcover of Advances in Elastomers and Rubber Elasticity online from Australias leading online bookstore.
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Mitsui Chemicals, Inc. announced the launching of a new product, a syndiotactic elastomer NOTIO SN. The company manufactures and widely distributes elastomers (flexible polymeric materials) for uses which include automotive, packaging, and construction materials.
A golf ball comprising a solid core and a cover disposed about the core, wherein the core is formed from a polybutadiene blend comprising a) a first polybutadiene having a first Mooney viscosity between about 50 and about 150, and b) a second polybutadiene having a second Mooney viscosity between about 30 and about 100, wherein the first Mooney viscosity is greater than the second Mooney viscosity, and wherein the blend has a greater weight percentage of the first polybutadiene than that of the second polybutadiene.
TY - JOUR. T1 - Clinical effectiveness of fluoride-releasing elastomers. I. T2 - Salivary Streptococcus mutans numbers. AU - Wilson, Thomas G.. AU - Gregory, Richard L.. PY - 1995/3. Y1 - 1995/3. N2 - The purpose of this study was to examine the effect of fluoride-releasing elastomers on salivary Streptococcus mutans numbers. Twenty-four patients with fixed orthodontic appliances were randomly divided into experimental and control groups consisting of 12 patients each. Conventional elastomers were in place while two baseline whole saliva samples were collected from each subject in both groups at their regular appointments. After the second baseline sample was taken, conventional elastomers were replaced with fluoride-releasing elastomers in the experimental group, whereas conventional elastomers were continued in the control group. Three saliva samples were then collected from all subjects at 1-week intervals. Conventional elastomers were placed in all subjects while two postexperimental saliva ...
TY - JOUR. T1 - Rheological Evaluation of the Isothermal Cure Characteristics of Medical Grade Silicone Elastomers. AU - McConville, C.. AU - Andrews, Gavin. AU - Laverty, T.P.. AU - Woolfson, David. AU - Malcolm, Karl. PY - 2010/5/15. Y1 - 2010/5/15. N2 - Silicone elastomer systems have been shown to offer potential for the fabrication of medical devices and sustained release drug delivery devices comprising low molecular weight drugs and protein therapeutics. For drug delivery systems in particular, there is often no clear rationale for selection of the silicone elastomer grade, particularly in respect of optimizing the manufacturing conditions to ensure thermal stability of the active agent and short cycle times. In this study, the cure characteristics of a range of addition-cure and condensation-cure, low-consistency, implant-grade silicone elastomers, either as supplied or loaded with the model protein bovine serum albumin (BSA) and the model hydrophilic excipient glycine, were investigated ...
This paper describes F-based dry etching and resulting surface properties of biocompatible silicone elastomer. The etch rate of polysiloxane and surface morphology was found to be highly temperature dependent. An increase in temperature results in a significantly higher etch rate and a lower surface roughness. Possible mechanisms of the etching process and the roughness formation on an elastomer surface are discussed. The polysiloxane surface was proved to have hydrophobic characteristics both prior to and after plasma exposure. The results of the preliminary cytotoxicity study are very promising: cell viability on a raw and plasma treated polysiloxane was found to be very high and comparable to control. Due to the acceptable etch rate and absence of toxic contaminations, a F-containing plasma is considered an excellent method for microprocessing of silicone elastomers intended for biomedical applications. Szmigiel, D.; Hibert, C.; Bertsch, Arnaud; Pamula, E.; Domanski, K.; Grabiec, P.; Prokaryn, P.;
Liveo™ offers a wide range of silicone elastomers, from high-consistency rubbers (HCRs) and liquid silicone rubbers (LSRs) to soft filling elastomers and silicone elastomer membranes.
POLYBUTADIENE ADDUCTED WITH MALEIC ANHYDRIDE (CAS 25655-35-0) Market Research Report 2018 aims at providing comprehensive data on polybutadiene adducted
A one-part silicone elastomeric composition that is flowable or easily extruded is prepared by mixing a hydroxyl endblocked polydiorganosiloxane, a difunctional silane having two amido radicals, and an organic peroxide suitable for vulcanizing silicone rubber. A nonacidic filler is optional. After being put in place, the composition is exposed to moisture to activate a chain extension reaction that increases the molecular weight of the polydiorganosiloxane, to improve the physical properties of the cured silicone elastomer. After chain extension has taken place, the composition is heated to activate the organic peroxide, thereby crosslinking the composition into a silicone elastomer. The composition is useful as a potting and encapsulating material.
Okayama University, JP. Keywords: adsorption, artificial insemination, porcine sperm motility, silicone elastomer, trajectories. Sperm motility analysis is a representative method for evaluation of male fertility, since motility correlates with viability. The conventional method, commonly referred to as Computer-Assisted Sperm Analysis (CASA), to records motility and linear velocity (LV) utilizing a microscope with a charge coupled device. The advantage of CASA over manual observation is the absence of subjective calibration. It is difficult to record trajectories of motile porcine sperms and investigate LV related to fertility because sperms often adsorb to glass and plastic, which remarkably decreases their motility. To record the trajectories of motile sperms and investigate their velocity distribution quantitatively under a microscope, the use of transparent materials that do not promote adsorption of motile sperms is necessary. The candidate material is hydrophobic silicone elastomer ...
With the purpose of improving the mechanical properties of the polyamides, the possibility of combining polyamides with elastomers has been used. The low compatibility of the resulting blends leads to deficient mechanical properties, and therefore, it is necessary to add the compatibilizer to the mixture or to produce the compatibilizer during the melting mixture. Usually, at least one of the components must contain a reactive functional groups. In the present work, blends of polyamide 6 (PA 6) and epichlorohydrin elastomers, polyepichlorohydrin (PEPI), and the equimolar copolymer poly(epichlorohydrin-co-ethylene oxide), EGO, with different compositions were prepared by mechanical mixture using a Banbury-type mixer. The blends were characterized by rheological measurements, the Molau test, elemental analysis, Infrared Spectroscopy by Diffuse Reflectance, Transmission Electron Microscopy, and X-ray Diffractometry. The blends of PA 6 with PEPI and ECO are heterogeneous, showing a morphology of ...
Fabricate wire and cable with proven XIAMETER® silicone elastomers for better wire and cable performance in demanding applications. Gain heat stability, flexibility, dielectric strength, and flame retardancy.
The performance advantages of silicone elastomers are widely known. Silicone provides unique characteristics that allow it to be in a broad range of applications, including applications serving continuous extreme conditions of temperature and pressure. ...
METHODS: Room-temperature polymerised maxillo-facial silicone elastomers (N=48) (10 mm x 10 mm x 2 mm) processed at different durations [VerSilTal VST-30 (20 min), VST-50 (12h overnight), VST-50F (6h)] were studied. C. albicans was chosen as a model organism for this study. The specimens were randomly divided into two subgroups and incubated in either 1.5 ml simulated saliva or nasal secretion containing C. albicans (ATCC 60193, set to 0.5 OD, 540 nm in advance) for 2h. Candida assays and adherence assays were made by inoculating C. albicans into Mueller Hinton Broth, Fluka added 500 mmol sucrose overnight. After fixation, specimens were stained by using sterilised Methylene Blue stain (Merck) and evaluated under optical microscope and SEM. For each material, on each specimen 15 different areas (mm(2)) were counted. Data were analysed using one-way ANOVA, paired sample t-test and Tukeys HSD (alpha=0.05 ...
Fabricate insulating sleeving with proven XIAMETER silicone elastomers for insulating sleeving that lasts longer, performs better in demanding applications. Add high-temperature performance, dielectric strength, and flame retardancy.
RTV31, RTV60 and RTV88 silicone elastomers are used in a variety of high temperature applications including thermal insulation and fabricating rubber parts.
Two-part, high tear strength silicone elastomer ; Cures with heat via addition-cure chemistry ; Has a non-tacky surface and no volatile by-products or peroxide residues ; Strained through a 400-mesh screen (minimum) ; 1:1 Mix Ratio (Part A: Part B) ;
Two-part, high tear strength silicone elastomer ; Cures with heat via addition-cure chemistry ; Has a non-tacky surface and no volatile by-products or peroxide residues ; Strained through a 400-mesh screen (minimum) ; 1:1 Mix Ratio (Part A: Part B) ;
Silicone Elastomers Market Size was estimated at over 1,000 kilo tons in 2015, with forecast expectations of 1,537 kilo tons by 2023.
The global production of the SBS block copolymer market is estimated to reach 1,910 million tons by 2017. Thermoplastic elastomers exhibit the fastest growth rate in the SBS block copolymer market. Expansion strategies adopted by the adhesive application industry and an increased usage of altered asphalts for waterproofing and roofing purposes, are some of the factors driving the SBS block copolymer market. The rising economies of the Asia Pacific nations, provides lucrative opportunities for the market.. Some of the key players in the SBS block copolymer market are: Polimeri Europa, China National Petroleum, ShenZhen Yanshan, Dexco Polymers, Sinopec Baling Company, Kraton Performance Polymersand others.This market research report analyzes important market segments, and major geographies. This report is a complete study of current trends in the market, industry growth drivers, and restraints. It provides market projections for the coming years. It includes analysis of recent developments in ...
It is well known that electrostrictive strains are proportional to the square of the applied electric field. It therefore appeared reasonable to assume that for some polymeric materials, a large acoustic thickness response might be obtained by application of high dc bias fields, approx. 20 MV/rn, to a film while driving the film with an ac signal to access the high slope region of the electrostrictive strain vs. applied field curve. Previous studies of crystallizing poly(vinylidene fluoride) (PVF2) from solution under high electric fields have demonstrated that gel-like samples of PVF2 with high content of the plasticizer tricresyl phosphate (TCP) could he subjected to electric fields as high as approx. 100 MV/m. Using this type of heavily plasticized PVF2, d sub T values approx. 4 Angstrom/V were obtained. Values of 9 Angstrom/V were obtained for a certain class of thermoplastic elastomer (i.e., a polyurethane). These d sub T values are considerably greater than those obtained from conventional
TSRC Corporation (TPE:2103) is principally engaged in the manufacture and sale of synthetic rubber. The Companys major products include styrene-butadiene rubber (SBR), for manufacturing tires, shoes, conveyor belts, sporting goods and toys; butadiene rubber (BR), applied to high-speed tires, shoes and sporting goods, and thermoplastic elastomer (TPE), applied to shoe soles, adhesives, hot melts, plastic modifications, asphalt modifications and others. The Company is also engaged in the production of thermal plastic rubber (TPR), as well as trading business. The Company primarily distributes its products in Mainland China, Japan, Southeast Asia, the United States and Europe.
Natural Realskin Vibrating Uncircumcised Xtender with Scrotum Ring Beige from Nasstoys of New York. Features: better than real realskin. Vibrating on top. Adds 3 inches to length. Removable bullet vibrator. RoHS compliant. Phthalates free. Waterproof vibrations. Materials: Penis Extension Sleeve Thermoplastic Elastomer