標題: The solid state C-13 NMR studies of intermolecular hydrogen bonding formation in a blend of phenolic resin and poly(hydroxyl ether) of bisphenol A
作者: Wu, HD
Ma, CCM
Chang, FC
應用化學系
Department of Applied Chemistry
公開日期: 31-七月-2000
摘要: Full Paper: The formation of intermolecular hydrogen bonds in blends of novolac type phenolic and poly(hydroxyl ether) of bisphenol A was investigated by studying its T-g behavior, excess volume, and solid state C-13 NMR spectra. The T-g and parameters of solid state C-13 NMR, such as the T-CH and spin-lattice relaxation time in the rotating frame T-1p(H), indicate that the London dispersion force (entropically favored) significantly affects the intermolecular hydrogen bonding of the blend. The phenoxy chain forces opening of the intra-association of phenolic and thus creates more free OHs. This strong entropic effect reduces the total hydrogen bonding of the system especially when one of the polymer is the minor component. This also results in the reduction of T-g and free volume expansion, reflecting in the increase of cross-polarization (C-H) time and molecular mobility within the phenolic/phenoxy blend.
URI: http://hdl.handle.net/11536/30380
ISSN: 1022-1352
期刊: MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume: 201
Issue: 11
起始頁: 1121
結束頁: 1127
顯示於類別:期刊論文


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