• Using fully atomistic molecular dynamics simulations, we study the structure and dynamics of amorphous polystyrene sulfonate with random, precise (number of carbons between ionizable groups is exact), and blocky distributions of the ionizable groups along the backbone. (aps.org)
  • Films of labeled polymers as well as blends of them with unlabeled polystyrene samples of different polydispersity and molecular weight, were prepared by solvent casting. (uc3m.es)
  • The influence of physical aging on the electret properties prior to corona-charging of three amorphous polymers, polyetherimide (PEI), poly(phenylene ether) (PPE), and polystyrene (PS), as well as with blends of PPE and PS, was investigated. (uni-bayreuth.de)
  • Coarse-Grained Polymer Melts Based on Isolated Atomistic Chains: Simulation of Polystyrene of Different Tacticities. (mpg.de)
  • Applicable to all amorphous polystyrene homopolymers. (iso.org)
  • Does not apply to expanded polystyrene, styrene copolymers, homopolymers of substituted styrene and those modified with other polymers such as elastomers. (iso.org)
  • PET may appear opaque, white and transparent depending on its crystalline and amorphous structure. (researchgate.net)
  • Polyethylene terephthalate, commonly coded as PET, PETE, is a thermoplastic polymer resin of the polyesters and is used in liquid containers, drinks, food and synthetic fibres. (researchgate.net)
  • Poly (methyl methacrylate) (PMMA) is an amorphous transparent thermoplastic polymer. (sigmaaldrich.com)
  • The mobility of the polymer and counterions is affected by both the number and size of the clusters as well as the number of polymer chains associated with each cluster. (aps.org)
  • Electrohydrodynamic-jet (EHD-jet) printing provides an opportunity to directly assembled amorphous polymer chains in the printed pattern. (figshare.com)
  • In the absence of tensile (stretching) stress, the polymer chains assume an amorphous , or disordered, arrangement. (britannica.com)
  • These disadvantages are overcome to a great extent by cross-linking the polymer chains through the process known as vulcanization . (britannica.com)
  • Printers like working with inks and coatings that use resin supported emulsion polymers rather than traditional latex emulsions. (mcpolymers.com)
  • Coatings made with resin supported emulsion polymers have advantages in both application ease and final product quality. (mcpolymers.com)
  • The next obvious industry application for resin supported polymers extends to paints and coatings, as this industry prizes the same capabilities of achieving high gloss and quality. (mcpolymers.com)
  • Combining multi-scale surface texturing and DLC coatings for improved tribological performance of 3D printed polymers. (uni-kassel.de)
  • Introduction to amorphous solids (3 hours): Topological disorder. (bath.ac.uk)
  • Rigorous Characterization and Predictive Modeling of Hole Transport in Amorphous Organic Semiconductors. (mpg.de)
  • we therefore investigate the hypothesis that the near-surface mechanical properties of amorphous polymers differ from the bulk properties owing to the presence of an absolute length scale. (tue.nl)
  • Besides, they keep the same mechanical properties, processability, and so forth that are commonly associated with conventional polymers. (hindawi.com)
  • Polymer particles may also mechanically hinder crystal growth outwards from the surface. (ku.dk)
  • This work highlights the importance of microparticulate surface coverage of amorphous drug particles on their stability. (ku.dk)
  • In this context, surfactants are both hydrophilic and part hydrophobic, performing the dual roles of controlling polymer growth and preventing separation of the latex particles in the mix. (mcpolymers.com)
  • i) Rheology of weakly attractive suspensions (computer simulations), ii) Best packing protocols for amorphous samples, tapping or oscillations (computer simulations), iii) Suspensions rheology of particles with tiny anisotropy (computer simulations), iv) Morphology of drying polymer blends (computer simulations together with Petter Persson). (lu.se)
  • Thin-film solar cells made with amorphous silicon (a-Si:H) or organic semiconductors are considered as promising renewable energy sources due to their low manufacturing cost and light weight. (edu.hk)
  • Polymer derived silicon oxycarbide ceramics (SiOC-PDCs) with widely different carbon contents have been synthesized, and their structures have been studied at different length scales using high-resolution 13 C and 29 Si magic-angle-spinning (MAS) NMR spectroscopic techniques. (elsevierpure.com)
  • Transient EPR signals attributed to charge transfer (CT) states and separated polarons are smaller in the blends with C-PCPDTBT as compared to those with the silicon-bridged polymer. (uni-potsdam.de)
  • Interpretive 2D lattice Monte Carlo simulations exhibit semi-quantitative agreement with experiments and elucidate the impact of the surface energy of the underlying amorphous material on the morphology of the crystalline phase. (aiche.org)
  • AFM and SEM data also demonstrate crystallization inhibition with polymer additives, with concentration-dependent crystal morphology. (aiche.org)
  • The work presented herein utilizes experimental and modeling tools to characterize and model solid-state crystallization at the amorphous-water interface as well as the impact on crystallization from polymer and surfactant species in solution. (aiche.org)
  • Modeling indicates that more-finely grained polymers in soils might have half-lives of about 10−17 years assuming degradation is surface-mediated. (acs.org)
  • Hierarchical modeling of polymer permeation. (mpg.de)
  • The acrylic resin has a lower molecular weight, (7,000 to 8.500 dalton,) and a higher glass transition temperature (Tg) - typically around 120 deg C - than the polymer. (mcpolymers.com)
  • Depending on its molecular structure, polyisoprene can be a resilient , elastic polymer ( elastomer ), as in the case of natural rubber and isoprene rubber, or a tough, leathery resin , as in the case of natural and synthetic balata or gutta-percha. (britannica.com)
  • We attribute the steady increase of hole mobility with fluorine content to changes in polymer molecular ordering. (uni-potsdam.de)
  • Fluorescence decays were fitted with bimodal fluorescence lifetime distributions, which were analyzed taking into consideration some polymer characteristics and the compatibility of polymer blends. (uc3m.es)
  • Formulators are able to control polymer growth and separation, as with a surfactant, but they can achieve additional attributes by using the resin, versus being limited to the performance characteristics of the surfactant. (mcpolymers.com)
  • Carbon-carbon bond cleavage reactions, adapted to deconstruct aliphatic hydrocarbon polymers and recover the intrinsic energy and carbon value in plastic waste, have typically been catalysed by metal nanoparticles or air-sensitive organometallics. (nature.com)
  • To produce electrically conductive or electrostatic dissipative polymer composites containing carbon nanotubes (CNT) melt processing is the favored route. (4spe.org)
  • The study focused on an amorphous polypropylene wax used on wax lines along with air samples for organic vapors, aldehydes, ketones, carbon-monoxide (630080), and carbon-dioxide (124389). (cdc.gov)
  • To harness this unusual reactivity, our catalytic architecture localizes ultrasmall amorphous zirconia nanoparticles between two fused platelets of mesoporous silica. (nature.com)
  • APAO synthesis and manufacture has been accomplished by properly designing the process of synthesizing the amorphous polyolefin, specifically, by the proper choice of catalyst system and the use of olefinic co-monomers. (wikipedia.org)
  • Engineered to prevent layers of polymer or plastic films from sticking together, Grace's SYLOBLOC ® silicas are highly efficient anti-blocking agents that enhance the film's surface micro-roughness to aid in anti-blocking and anti-slipping. (grace.com)
  • Two layers of polymer film, with argon gas between the two layers, the 'gap' pressurized more than interior but less than Mars ambient, and spectrally selective coating. (newmars.com)
  • The time resolved emission of anthryl groups in those films was measured by Single Photon Counting with front face excitation at the standard 30° incident angle and with much lower incident angles to photoselect chromophores on the polymer-air surface. (uc3m.es)
  • Surface coverage may affect the crystallisation behaviour of amorphous materials. (ku.dk)
  • Like needle electrospinning, free-surface electrospinning uses the applied potential between a polymer solution and a grounded plate to produce Taylor cone jets. (ispe.org)
  • The strong triplet signal is not observed in blends containing the Si-bridged polymer, indicating efficient singlet exciton splitting and subsequent charge carrier separation at the Si-PCPDTBT/PCBM interface. (uni-potsdam.de)
  • Herein, an EHD-jet printed amorphous polymer was employed as the active layer for fabrication of organic field-effect transistors (OFETs). (figshare.com)
  • He then joined the research groups of Prof. Ueli Suter in Polymer Science, and of Prof. Richard R. Ernst in Physical Chemistry at ETH as a doctoral candidate. (southampton.ac.uk)
  • It was demonstrated that physical aging below the glass transition temperature substantially improves the electret performance of amorphous polymers by reducing the free volume and thus hindering charge motion. (uni-bayreuth.de)
  • The glass transition temperature of the bio-polymer Ι-carrageenan with NH4NO3 electrolytes has been found using differential scanning calorimetric technique. (amrita.edu)
  • Sulfones are amorphous engineering thermoplastics noted for high heat-deflection temperatures and outstanding dimensional stability. (machinedesign.com)
  • These strong, rigid polymers are the only thermoplastics that remain transparent at service temperatures as high as 400°F. (machinedesign.com)
  • Stiffness degradation behavior of a polymer nanocomposite under constant amplitude fatigue loads. (nal.res.in)
  • 30 ] fabricated heterojunction diodes using poly(o-methoxyaniline)/PANI and amorphous/microcrystalline Si structures. (hindawi.com)
  • This study investigates crystallisation inhibition in powder mixtures of amorphous drug and pharmaceutical excipients. (ku.dk)
  • Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics. (4spe.org)
  • Decoration of polymers with ionizable groups results in distinctive structures that drive their dynamics. (aps.org)
  • One significant unresolved issue is the impact the of distribution of ionizable groups along the polymer backbone on cluster formation and thus on the dynamics of the polymers. (aps.org)
  • We have proposed two methods to obtain transparent copolymers as a result of comprehensive study on the light scattering properties of binary amorphous copolymers, which are to use a pair of monomers with comparable refractive indices, or a pair which forms narrow composition distributions. (elsevierpure.com)
  • Properties of polymers : their estimation and correlation with chemical structure. (wikipedia.org)
  • PANI is one of the most important classes of conjugated polymers that possess excellent electronic, optical, and redox properties. (hindawi.com)
  • Crystallization is very significant properties affecting all mechanical and physical properties of PET just as for all kind of polymers. (researchgate.net)
  • properties of PET just as for all kind of polymers. (researchgate.net)
  • Polyisoprene-built up from the linking of multiple isoprene molecules-can assume any one of four spatial configurations, or isomers, each of which imparts a unique set of properties to the polymers. (britannica.com)
  • Developing novel materials and device architectures to further enhance the efficiency of polymer solar cells requires a fundamental understanding of the impact of chemical structures on photovoltaic properties. (uni-potsdam.de)
  • The spin-lattice relaxation time of positive polarons in C-PCPDTBT at low temperature ( T = 80 K) is found to be more than two orders or magnitude longer than in the Si-bridged polymer derivative. (uni-potsdam.de)
  • Amorphous pharmaceutical formulations are an increasingly common strategy for dissolution and bioavailability enhancement of poorly soluble drug compounds. (aiche.org)
  • At Mallard Creek Polymers, we routinely work with our customers to recommend emulsions that will give their formulations a competitive edge, develop greater quality, or achieve cost efficiency. (mcpolymers.com)
  • These advanced polymer resin formulations are easier to work with and give the end product a host of desirable qualities not otherwise achievable. (mcpolymers.com)
  • Resin supported emulsions are a unique subset of styrene-acrylic emulsion polymers. (mcpolymers.com)
  • During polymerization, some of the resin grafts onto the backbone of the polymer, creating a core shell type of structure, while the rest of the resin stays in the aqueous phase. (mcpolymers.com)
  • Also, the more resin that's used, the higher the acid number, signifying superior polymer functionality. (mcpolymers.com)
  • Thus, resin supported polymers help printers increase revenue while cutting costs. (mcpolymers.com)
  • Resin supported polymers have yet another benefit, deep in the mix. (mcpolymers.com)
  • As previously noted, while some of the resin bonds to the polymer, the rest remains in aqueous phase. (mcpolymers.com)
  • While resin supported polymers are prevalent in printing and packaging, they certainly aren't limited to these industry applications. (mcpolymers.com)
  • With a variety of market applications, resin supported polymers can help formulators achieve certain performance attributes that increase quality and finish, as well as eliminate waste and the need for surfactants. (mcpolymers.com)
  • Stabilization against crystallization during storage as well as during dosing is usually achieved by dispersing amorphous drug in a polymeric matrix and has been well studied. (aiche.org)
  • Solid-state crystallization at this amorphous drug-water interface is not well understood, nor is the role played by excipients in influencing this crystallization phenomenon. (aiche.org)
  • To evaluate this possibility, we incubated an acrylate-linked fluorotelomer polymer in soil microcosms and monitored the microcosms for possible fluorotelomer (FT) and perfluorinated-compound (PFC) degradation products using GC/MS and LC/MS/MS. This polymer scavenged FTs and PFCs aggressively necessitating development of a multistep extraction using two solvents. (acs.org)
  • Aged microcosms accumulated more FTs and PFCs than were present in the fresh polymer indicating polymer degradation with a half-life of about 870−1400 years for our coarse-grained test polymer. (acs.org)
  • In our polymer-soil microcosms, PFOA evidently was lost with a half-life as short as 130 days, possibly by polymer-catalyzed degradation. (acs.org)
  • These results suggest that fluorotelomer-polymer degradation is a significant source of PFOA and other fluorinated compounds to the environment. (acs.org)
  • PMMA is recognized as an optical polymer based on its refractive index of 1.49. (sigmaaldrich.com)
  • Near-edge X-ray absorption fine structure measurements were performed to compare the amorphous chain alignment in OFET active layers prepared by EHD-jet printing and spin coating. (figshare.com)
  • Therefore, these polymers are commonly known as " synthetic metals " [ 1 ]. (hindawi.com)
  • polyisoprene , polymer of isoprene (C 5 H 8 ) that is the primary chemical constituent of natural rubber , of the naturally occurring resins balata and gutta-percha , and of the synthetic equivalents of these materials. (britannica.com)
  • Using time-resolved electron paramagnetic resonance (EPR) spectroscopy in conjunction with optical excitation we study charge separation in conjugated polymers blended with [6,6]-phenyl C61-butyric acid methyl ester (PCBM). (uni-potsdam.de)
  • The shape of the transient EPR spectra reveals that the triplet excitons are, in contrast to those formed in pristine polymer films, not generated by direct intersystem crossing but result from back electron transfer through CT state recombination. (uni-potsdam.de)
  • Polymer Journal, 34 (12), pp. 905-910. (uc3m.es)
  • Needle penetration (NP) - indicates resistance to deformation and hardness, and is typically determined as per ASTM D-1321, ASTM D5 or DIN EN 1426 test methods Ring and ball softening point (RBSP) - indicates resistance to heat, and is typically determined as per ASTM E-28 or DIN EN 1427 test methods. (wikipedia.org)
  • High impact, high heat distortion, amorphous polymer with excellent thermoformability. (spartech.com)
  • Here we demonstrate an efficient double-junction photovoltaic cell by employing an a-Si:H film as a front sub-cell and a low band gap polymer:fullerene blend film as a back cell on planar glass substrates. (edu.hk)
  • We propose a strategy based on athermal photo-welding to construct 3D actuators assembled by azobenzene-containing linear liquid crystal polymers with different orientations, which demonstrate diverse deformations of curling, winding, and unwinding. (rsc.org)