作者: S Kripotou , P Pissis , V.A Bershtein , P Sysel , R Hobzova
DOI: 10.1016/S0032-3861(03)00136-8
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摘要: Abstract Dielectric techniques, including broadband dielectric relaxation spectroscopy and thermally stimulated depolarization currents, to a lesser extent differential scanning calorimetry equilibrium water sorption isotherm measurements, were employed investigate molecular mobility in relation morphology polyimide–poly(dimethylsiloxane) hybrid networks (PI–PDMS). NMR measurements on the same samples had indicated that short PDMS chains with both ends chemically bound PI phase, form spherical domains of nanometer size. The local, secondary γ PI, primary α relaxation, associated glass transition PDMS, interfacial Maxwell–Wagner–Sillars related microphase-separated morphology, studied detail. results are discussed terms nanoscale confinement components fixed chain component. These factors found affect considerably magnitude relaxations, whereas time scale relaxations remains practically unchanged.