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Micro/macro-stress relationship and local stress distribution in polyethylene spherulites upon uniaxial stretching in the small strain domain
10.1016/j.polymer.2018.02.052 2018-02-23 Local stress of polyethylene spherulites under uniaxial stretching in small strain domain has been investigated by in-situ wide angle X-ray diffraction (WAXD) in comparison with macroscopic stress. Particular attention is paid to the elastic strain range. The... |
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Identification of the reaction mechanism between phenyl methacrylate and epoxy and its application in preparing low-dielectric epoxy thermosets with flexibility
10.1016/j.polymer.2018.02.045 2018-02-23 NORYL™ SA9000 resin is a commercialized telechelic PPO oligomer with phenyl methacrylate end groups. However, neat SA9000 thermoset is brittle after thermally curing. To find a method to enhance the toughness of neat SA9000 thermoset, three model reactions ar... |
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Molecular dynamics study of competing hydrogen bonding interactions in multicomponent diffusion in polyurethanes
10.1016/j.polymer.2018.02.039 2018-02-22 Understanding multicomponent diffusion in polymers on the molecular-scale could lead to optimization of many practical processes. One important example is the removal of a toxic chemical (penetrant) from polyurethanes, which serve as the binder in many coatin... |
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Enthalpy recovery of ultrathin polystyrene film using Flash DSC
10.1016/j.polymer.2018.02.038 2018-02-22 Enthalpy recovery for a single polystyrene ultrathin film of 20 nm thickness is studied using Flash DSC over an extended time and temperature range. Results are compared to a bulk sample of the same polystyrene using a similar experimental protocol and analys... |
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Confinement effects in the step-growth polymerization within AAO templates and modeling
10.1016/j.polymer.2018.02.041 2018-02-22 Nanostructured polyurethanes have attracted substantial interest for the generation of “smart” surfaces, but the step-growth polymerization at nanoscale has scarcely been reported. In this work, the synthesis of polyurethanes by the step-growth polymerization... |
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Synthesis of poly(chloroprene)-based block copolymers by RAFT-mediated emulsion polymerization
10.1016/j.polymer.2018.02.025 2018-02-21 Chloroprene (CP)-based block copolymers were synthesized via the RAFT-mediated emulsion polymerization of CP using polyacrylate macro-chain transfer agents (CTAs) via a one-pot (in-situ), two-step process. The quantitative formation of hydrophobic macro-CTA i... |
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Thermal, mechanical properties and shape memory performance of a novel phthalide-containing epoxy resins
10.1016/j.polymer.2018.02.043 2018-02-20 A novel phthalide-containing aromatic amine (PBMI-DDE) was synthesized by Michael addition of 3,3-bis[4-(4-maleimidophenoxy)phenyl]phthalide (PBMI) and 4,4′-diaminodiphenylether (DDE), its chemical structure was confirmed by nuclear magnetic resonance (NMR) s... |
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High pressure RAFT of sterically hindered ionic monomers. Studying relationship between rigidity of the polymer backbone and conductivity
10.1016/j.polymer.2018.02.030 2018-02-19 The synthesis of poly(ionic liquid)s (PILs), a new class of polymers with numerous possible applications and tailored thermorheological properties, is quite a challenging task. To achieve that goal, different strategies have been proposed and developed. Howev... |
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Polythiophenes with carboxylate side chains and vinylene linkers in main chain for polymer solar cells
10.1016/j.polymer.2018.02.035 2018-02-19 Two polythiophenes with carboxylate side chains and vinylene linkers in conjugated backbones, i.e., poly[5,5′-(E)-bis(2-hexyldecyl)-2,2′-(ethene-1,2-diyl)bis(thiophene-3-carboxylate)-alt-5,5′- 2,2′-bithiophene] (PBT) and poly[5,5′-(E)-bis(2-hexyldecyl)-2,2′-(... |
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All-polyethylene composites reinforced via extended-chain UHMWPE nanostructure formation during melt processing
10.1016/j.polymer.2018.02.027 2018-02-19 Nanophase separation during injection molding of high density polyethylene (HDPE) together with polyethylene reactor blend (RB) additives that have ultrabroad bimodal molar mass distribution and a high content of ultrahigh molar mass polyethylene (UHMWPE), pr... |