کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1486419 1510564 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric properties of cured epoxy resin + poly(ethylene oxide) blends
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Dielectric properties of cured epoxy resin + poly(ethylene oxide) blends
چکیده انگلیسی

Epoxy resin (ER) + poly(ethylene oxide) (PEO) blends cured with 4,4′-diaminodiphenyl-methane were studied by thermally stimulated currents and dielectric relaxation spectroscopy. The results confirm components miscibility with dielectric glass transition temperature-composition dependence obeying the empirical Gordon–Taylor G–T equation with k = 0.38. Positive departures from the G–T curve appear at high PEO loadings due to crystallization of the linear polyether. Subtle perturbations of the local-chain relaxation dynamics and the relatively low k estimate advocate for weakened intermolecular-specific interactions in the miscible blends, compared with the intramolecular self-association of hydroxyls in pure ER, suggesting structural similarity as the primary driving force for phase miscibility.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 33–36, 15 September 2005, Pages 2728–2734
نویسندگان
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