Dielectric studies of molecular mobility in hybrid polyimide–poly(dimethylsiloxane) networks

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.

参考文章(27)
James E. McGrath, Debra L. Dunson, Sue J. Mecham, James L. Hedrick, Synthesis and characterization of segmented polyimide-polyorganosiloxane copolymers Advances in Polymer Science. ,vol. 140, pp. 61- 105 ,(1999) , 10.1007/3-540-49815-X_3
Ernst-Joachim Donth, Relaxation and thermodynamics in polymers : Glass transition Akademie-Verlag. ,(1992)
Péter. Hedvig, Dielectric spectroscopy of polymers ,(1977)
J. B. Birks, James Herbert Schulman, Progress in Dielectrics Progress in Dielectrics. ,vol. 4, ,(1959)
Ye.P. Mamunya, V.V. Davydenko, P. Pissis, E.V. Lebedev, Electrical and thermal conductivity of polymers filled with metal powders European Polymer Journal. ,vol. 38, pp. 1887- 1897 ,(2002) , 10.1016/S0014-3057(02)00064-2
Nobuyuki Furukawa, Masatoshi Yuasa, Yasuharu Yamada, Yoshiharu Kimura, Synthesis and properties of novel thermosetting polysiloxane-block-polyimides with vinyl functionality Polymer. ,vol. 39, pp. 2941- 2949 ,(1998) , 10.1016/S0032-3861(97)00614-9
Ken-Ichi Okamoto, Nozomu Tanihara, Hitoshi Watanabe, Kazuhiro Tanaka, Hidetoshi Kita, Asumaru Nakamura, Yoshihiro Kusuki, Kanji Nakagawa, Sorption and diffusion of water vapor in polyimide films Journal of Polymer Science Part B: Polymer Physics. ,vol. 30, pp. 1223- 1231 ,(1992) , 10.1002/POLB.1992.090301107
G Maier, Low dielectric constant polymers for microelectronics Progress in Polymer Science. ,vol. 26, pp. 3- 65 ,(2001) , 10.1016/S0079-6700(00)00043-5
Vladimir A. Bershtein, Laurent David, Larisa M. Egorova, Athanassios Kanapitsas, Oto Meszaros, Polycarpos Pissis, Petr Sysel, Pavel N. Yakushev, Structure-property relationships in polyimide molecular composites Materials Research Innovations. ,vol. 5, pp. 230- 237 ,(2002) , 10.1007/S10019-002-0178-2