• The big difference between a crosslinked rubber and a thermoplastic elastomer is that in a crosslinked rubber, the polymer chains are bond to each other through covalent bonds, that is, the bonds that form when two atoms share a pair of electrons. (pslc.ws)
  • In either type of thermoplastic elastomer, the polymer chains are held together by bonds which are weaker than covalent bonds. (pslc.ws)
  • 10. The method of claim 1 wherein the cement composition further comprises a hydrophobic particulate elastomer selected from the group consisting of a styrene butadiene random copolymer, a styrene butadiene block copolymer, an acrylonitrile butadiene styrene copolymer, an ethylene-propylene-diene-monomer copolymer, a styrene-acrylic copolymer, an acrylonitrile butadiene rubber polymer, a methylmethacrylate butadiene styrene rubber, a styrene-acrynitrile rubber, and combinations thereof. (google.com)
  • Anton Paar's solutions provide unique information on properties such as structure stability, elasticity and flow behavior, for complete investigations on polymer and elastomer chains in numerous applications. (anton-paar.com)
  • An elastomer is a polymer with viscoelasticity (having both viscosity and elasticity ) and very weak inter-molecular forces , generally having low Young's modulus and high failure strain compared with other materials. (wikipedia.org)
  • IUPAC defines the term "elastomer" as " Polymer that displays rubber-like elasticity. (wikipedia.org)
  • Polymer chains are held together in elastomers by weak intermolecular forces. (wikipedia.org)
  • Elastomers that have cooled to a glassy or crystalline phase will have less mobile chains, and consequentially less elasticity, than those manipulated at temperatures higher than the glass transition temperature of the polymer. (wikipedia.org)
  • 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. (google.com)
  • 7. A thermoplastic elastomer composition according to claim 6, wherein the melting point of said 1-olefin polymer is at least 130 C. and wherein said curative is a sulfur curative. (google.com)
  • 4. The elastomer rubber composition of claim 1 , wherein said polymer miscible with said elastomer rubber is selected from the group consisting of polyethylene, polypropylene, ethylene-propylene rubber, and ethylene-α-olefin-diene rubber. (google.ca)
  • 6. The elastomer rubber composition of claim 5 , wherein said polar functional group is maleic anhydride and said polymer miscible with said elastomer rubber is polyethylene. (google.ca)
  • 7. The elastomer rubber composition of claim 1 , wherein said polymer miscible with said elastomer rubber includes said polar functional groups at a concentration of from about 3% to about 20% by weight of said polymer. (google.ca)
  • Compounded polymer or elastomer products are filled with glass powder, fibers, or cloth to provide improved strength and/or stiffness. (globalspec.com)
  • Liquid crystalline elastomers (LCEs) are slightly crosslinked liquid crystalline polymer networks. (wikipedia.org)
  • In liquid crystalline elastomers, the mesogens can either be part of the polymer chain (main-chain liquid crystalline elastomers) or they are attached via an alkyl spacer (side-chain liquid crystalline elastomers). (wikipedia.org)
  • Larry McKeen has also added detailed descriptions of sterilization methods for most common polymer classes such as polyolefins, polyamides, polyesters, elastomers, fluoropolymers, biodegradable plastics. (cnbc.com)
  • The situation is more complex in the case of elastomer-based materials that may be composed of several polymer components, some of them displaying 1H complex macromolecular architectures. (weizmann.ac.il)
  • The subject invention relates to the anionic polymerization of diene polymer and copolymer elastomers. (google.es)
  • This last phenomenon is the critical clue that the ability of an elastomer to do work depends (as with an ideal gas) only on entropy-change considerations, and not on any stored (i.e., potential) energy within the polymer bonds. (wikipedia.org)
  • It has been found that a substantial percentage of cis double bond configurations in the polymer will result in a material with flexible elastomer (rubber-like) qualities. (wikipedia.org)
  • Polymer-bonded explosives have several potential advantages: If the polymer matrix is an elastomer (rubbery material), it tends to absorb shocks, making the PBX very insensitive to accidental detonation, and thus ideal for insensitive munitions. (wikipedia.org)
  • Silicone rubber is an elastomer (rubber-like material) composed of silicone-itself a polymer-containing silicon together with carbon, hydrogen, and oxygen. (wikipedia.org)
  • EPDM rubber (ethylene propylene diene monomer (M-class) rubber), a type of synthetic rubber, is an elastomer characterized by a wide range of applications. (wikipedia.org)
  • Edward N. Kresge is a retired Exxon scientist, noted for his development of ethylene-propylene viscosity index modifiers, polyolefin thermoplastic elastomers, and tailored molecular weight density EPDM elastomers. (wikipedia.org)
  • Stevens invented or contributed significantly to the commercialization of a large number of commercial products, including AFFINITY™ polyolefin plastomers, ENGAGE™ polyolefin elastomers, ELITE™ enhanced polyethylene resins, NORDEL-MG™ EPDM rubber, NORDEL-IP™ elastomers, Dow XLA-fibers, INDEX™ ethylene/styrene copolymers, VERSIFY™ propylene copolymers, and INFUSE™ Olefin Block Copolymers. (wikipedia.org)
  • Usually, strains of DEA are in the order of 10-35%, maximum values reach 300% (the acrylic elastomer VHB 4910, commercially available from 3M , which also supports a high elastic energy density and a high electrical breakdown strength. (wikipedia.org)
  • Polyurethanes combine the elastic properties of elastomers with the processability of thermoplastic materials. (skf.com)
  • Rubber-like solids with elastic properties are called elastomers. (wikipedia.org)
  • Various other types of 4S elastomers: Thermoplastic elastomers (TPE) The proteins resilin and elastin Polysulfide rubber Elastolefin, elastic fiber used in fabric production De, Sadhan K. (31 December 1996). (wikipedia.org)
  • The Elastic and Damping Properties of Magnetorheological Elastomers" (PDF). (wikipedia.org)
  • They are called elastomers because they are very "elastic" polymers. (jrank.org)
  • The result is that an elastomer behaves somewhat like an ideal monatomic gas, inasmuch as (to good approximation) elastic polymers do not store any potential energy in stretched chemical bonds or elastic work done in stretching molecules, when work is done upon them. (wikipedia.org)
  • Using linear elastic indentation hardness, a relation between the ASTM D2240 hardness and the Young's modulus for elastomers has been derived by Gent and by Mix and Alan Jeffrey Giacomin. (wikipedia.org)
  • For elastomers, such as rubber, the elastic limit is much larger than the proportionality limit. (wikipedia.org)
  • 5. The method of claim 1 wherein the particulate carboxylated elastomer comprises at least one elastomer selected from the group consisting of an ethylene acrylic acid copolymer, a copolymer comprising styrene and an acrylic acid ester, a copolymer comprising ethylene and an acrylic acid ester, and combinations thereof. (google.com)
  • 5. The tire of claim 3 where said additional elastomer (C) is at least one elastomer selected from 1,4-polybutadiene, styrene/butadiene copolymers and isoprene/butadiene copolymers. (google.com.au)
  • In various embodiments, the seal is formed of a rubber composition comprising a vulcanized fluorocarbon elastomer dispersed in a matrix of a thermoplastic polymeric material. (google.com)
  • High tear strength, low hardness silicone elastomer-forming composition is provided using a unique combination(s) of polyorganosiloxanes and organohydrogenpolysiloxanes, where the polyorganosiloxanes and the organohydrogenpolysiloxanes contain both straight-chain and resinous polyorganosiloxanes. (google.es)
  • 2. The curable high tear strength, low hardness silicone elastomer forming composition of claim 1 where at least two organopolysiloxanes (A) comprises the reaction product of linear polyorganosiloxane and branched polyorganosiloxane. (google.es)
  • 10. The elastomer rubber composition of claim 1 , further comprising about 130 to about 200 phr carbon black, about 20 phr to about 80 phr kaolin clay, and about 0 to about 40 phr CaCO 3 . (google.ca)
  • The inventive process involves the impregnation of an inventive elastomer composition comprising (i) a water-borne polyurethane latex, (ii) an acid-generating chemical, and (iii) a cloud point surfactant, within a textile fabric. (google.com)
  • The inventive elastomer composition is also provided. (google.com)
  • According to the invention, I have discovered that excellent cure rates of the elastomer-resin composition may be obtained by using a promoter system as an aid to the catalyst to accelerate the reaction. (google.es)
  • Dielectric elastomers ( DEs ) are smart material systems that produce large strains . (wikipedia.org)
  • The behavior of unfilled, vulcanized elastomers often conforms closely to the hyperelastic ideal. (wikipedia.org)
  • Due to their actuation properties, liquid crystalline elastomers are attractive candidates for the use as artificial muscles in microrobots. (wikipedia.org)
  • For liquid crystalline elastomers with a high azo-concentration, a light-responsive change of the sample's length of up to 40% could be observed. (wikipedia.org)
  • Heino Finkelmann (born 12 February 1945, Gronau) is a professor at the University of Freiburg and a highly cited chemist in the area of liquid-crystalline elastomers. (wikipedia.org)
  • The present invention relates to novel thermoplastic elastomers having excellent stress-strain properties, low tensile set, high melting temperatures and/or excellent strength/toughness characteristics as well as superior flexibility which are especially suitable for molding and extrusion applications. (google.com)
  • D.H. Weitzel, R. F. Robbins, and G.R. Bopp, "Elastomers for Static Seals at Cryogenic Temperatures," Advances in Cryogenic Engineering, Vol.6, K.D. Timmerhaus (ed. (springer.com)
  • Other uses of conductive elastomers include conductive flexible seals and gaskets, and conductive mats used to prevent electrostatic damage to electronic devices. (wikipedia.org)
  • Thiokol polymers are used as an elastomer in seals and sealants. (wikipedia.org)
  • VERSIFY™ Plastomers and Elastomers are a versatile family of specialty propylene-ethylene copolymers produced with a revolutionary catalyst in combination with Dow's proprietary INSITE™ Technology and Solution Process. (dow.com)
  • The different elastomers have been subjected to aging in neat fatty acid methyl esters, RME and SME, at a variety of durations and temperatures. (sae.org)
  • Cavitation is the unstable unhindered expansion of a microscopic void in a solid elastomer under the action of tensile hydrostatic stresses. (wikipedia.org)
  • Casting resins are plastic or elastomer compounds used to cast parts, molds, or to form a structure in place. (globalspec.com)
  • Polymers, elastomers, or resins offered in the form of a high-to moderate-viscosity "solid" or liquid gel. (globalspec.com)
  • For example, resins with ability to bond directly to elastomers to give plastic-rubber composites, and with approval for direct contact with drinking water and food. (wikipedia.org)
  • A method for fabricating silocone elastomer stamps with hydrophilic surfaces is provided. (freepatentsonline.com)
  • Other side groups, such as non-fluorinated alkoxy or oligo-alkyl ether units, yield hydrophilic or hydrophobic elastomers with glass transitions over a broad range from -100 °C to 100 °C. Polymers with two different aryloxy side groups have also been developed as elastomers for fire-resistance as well as thermal and sound insulation applications. (wikipedia.org)
  • The contents also cover the chemical aspects, physical structure and properties, life cycle assessment, and recycling possibilities as well as such unique "smart" properties like the shape memory effect of the three classes of thermoplastic elastomers. (wiley.com)
  • Different techniques to disperse multi-walled carbon nanotubes (MWCNT) in elastomers using an internal mixer are applied and the physical properties of the resulting composites are evaluated. (oreilly.com)
  • Residual hydrogen bond donors and acceptors responsible for the self-healing properties of the elastomer remain unpaired until the newly exposed surface comes in contact with another complimentary surface, allowing formation of new intermolecular hydrogen bonds. (wikipedia.org)
  • This invention provides the aforesaid novel prepolymers, the processing made possible by the prepolymers, the polyurethane elastomers resulting from the prepolymers and the products made from those elastomers. (google.com)
  • The new clean-operations facility produces SILPURAN and ELASTOSIL silicone elastomers for medical applications, as well as highly specialized LUMISIL , SEMICOSIL , and WACKER SilGel silicone products for encapsulating and coating electronic components. (webwire.com)
  • Charles Goodyear's discovery of vulcanization, involving the heating of polyisoprene with sulfur, was revolutionary because it converted a sticky and almost useless material into an elastomer which could be fabricated into useful products. (wikipedia.org)
  • Adhesive products, coatings, and elastomers are used extensively throughout consumer and industrial applications. (wikipedia.org)
  • The present invention is directed generally to the use of propylene-based elastomers in articles. (google.ca)
  • 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. (google.ca)
  • The present invention is also directed to processes for making articles comprising propylene-based elastomers. (google.ca)
  • This standard is modified to add a few more Standard Reference Compounds, in order to enhance the portfolio on FKM, AEM and ACM reflecting advancements in elastomer technology. (sae.org)
  • Cold cast elastomers consist mainly out of two component systems, where one component is the SUPRASEC MDI variant and the other component is the polyol blend containing fillers, processing additives, catalyst and other modifiers. (industrysearch.com.au)
  • Selection of the base of the said two synthetic elastomers having spaced apart, or spatially defined, Tg's of at least 40 C. is an important feature of the tread rubber blend. (google.com.au)
  • Polyurea is a type of elastomer that is derived from the reaction product of an isocyanate component and a synthetic resin blend component through step-growth polymerization. (wikipedia.org)
  • Due to the mechanical compression the elastomer film contracts in the thickness direction and expands in the film plane directions. (wikipedia.org)
  • These elastomers also have uses in the energy industry, where they could be used to make flexible solar cells or stretchable devices for converting mechanical energy to electrical energy. (wikipedia.org)
  • Such elastomers, when compounded to form articles such as tires, power belts and the like, will show an increase in rebound, a decreased rolling resistance and will have less heat build-up when mechanical stresses are applied. (google.es)
  • However, the operating conditions and environment should not degrade or induce mechanical failure of the elastomer part for the life of the equipment. (wikipedia.org)