請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/41978
標題: Facile Preparation of Novel Epoxy Curing Agents and Their High-Performance Thermosets
作者: Lin, C.H.
戴憲弘
Lin, T.L.
Chang, S.L.
Dai, S.A.
Cheng, R.J.
Hwang, K.Y.
Tu, A.P.
Su, W.C.
關鍵字: curing agents
curing of polymers
flame-retardance
high performance
polymers
high T(g)
thermosets
phosphorus-containing epoxy
glass-transition temperatures
flame-retardant
diglycidyl ether
phosphine oxide
containing polymers
bisphenol-a
resins
polyimides
spiroorthoester
期刊/報告no:: Journal of Polymer Science Part a-Polymer Chemistry, Volume 46, Issue 23, Page(s) 7898-7912.
摘要: Two flame-retardant epoxy curing agents, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl-tris(4-hydroxyphenyl)methane (1) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl- (4-aminophenyl)-bis(4-hydroxyphenyl)methane (2), were prepared by a facile, economic, one-pot procedure. The structures of the curing agents were confirmed by IR, high-resolution mass, 1-D, and 2-D NMR spectra. A reaction mechanism was proposed for the preparation, and the effect of electron withdrawing/donating effects on the stabilization of the carbocation was discussed. (1-2) served as curing agents for diglycidyl ether of bisphenol A (DGEBA), dicyclopentadiene epoxy (HP-7200), and cresol novolac epoxy (CNE). Properties such as glass transition temperature, coefficient of thermal expansion, thermal decomposition temperature, and flame retardancy of the resulting epoxy thermosets were evaluated. The resulting epoxy thermosets show high T(g) low thermal expansion, moderate thermostability, and excellent flame retardancy. The bulky biphenylene phosphinate pendant makes polymer chains difficult to rotate, explaining the high T, and low thermal expansion characteristic. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 7898-7912, 2008
URI: http://hdl.handle.net/11455/41978
ISSN: 0887-624X
文章連結: http://dx.doi.org/10.1002/pola.23069
顯示於類別:化學工程學系所

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