Neutron scattering investigation of a diluted blend of poly(ethylene oxide) in polyethersulfone.
作者： A.-C. Genix , A. Arbe , S. Arrese-Igor , J. Colmenero , D. Richter
DOI: 10.1063/1.2918497
关键词: Ethylene oxide 、 Crystallinity 、 Analytical chemistry 、 Quasielastic neutron scattering 、 Neutron scattering 、 Materials science 、 Polymer chemistry 、 Glass transition 、 Polymer 、 Neutron diffraction 、 Polymer blend
摘要: By using quasielastic neutron scattering (QENS) with isotopic labeling we have investigated the component dynamics in a miscible blend of polyethersulfone (PES) and poly(ethylene oxide) (PEO) 75% content weight PES. Due to large difference glass-transition temperatures, Tg’s, two polymers (TgPEO≈220K, TgPES≈382K) dynamic asymmetry system dramatically increases when approaching average Tg blend, ⟨Tgblend⟩. For fast component, this leads behavior which hints crossover from typical glass-forming liquidlike at high temperatures confined close ⟨Tgblend⟩ induced by freezing segmental motions slow The features PEO motion observed QENS are similar those secondary γ-relaxation detected for pure (semicrystalline) PEO. A diffraction study short-range order homopolymers suggests that coincidence could be due similarities inte...
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