文献类型：期刊文献

英文题名：The curing reactions of ethynyl-functional benzoxazine

作者：Huang, Jianxiang[1]; Zhang, Jian[1]; Wang, Fan[1]; Huang, Farong[1]; Du, Lei[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2006

卷号：66

期号：12

起止页码：1395

外文期刊名：REACTIVE & FUNCTIONAL POLYMERS

收录：;EI(收录号：20064710251155);WOS:【SCI-EXPANDED(收录号:WOS:000242881100001)】；

语种：英文

外文关键词：benzoxazine; ethynyl-functional benzoxazine; cure reaction; kinetics

摘要：The model compounds 3-(3-ethynyl-phenyl)-6-methyl-3,4-dihydro-2H-benzoxazine (EPMB) and 6-methyl-3-phenyl3,4-dihydro-2H-benzoxazine (PMB) were synthesized and the influence of ethynyl group on the thermal cure reaction of benzoxazine compound was investigated. The bond parameters of benzoxazine ring calculated at the level of B3LYP/6-31G(d) showed that the variations of benzoxazine structures due to the introduction of ethynyl were negligible. The cure reaction of EPMB and PMB was studied by DSC and kinetic parameters were determined by an autocatalytic model. The results revealed that the apparent activation energy for cure reaction of EPMB was 103.90 kJ/mol which was lower than that of PMB (124.14 kJ/mol). The kinetic parameters of cure reactions of PMB and EPMB obtained by the Kissinger and Ozawa methods agreed well with the results by the autocatalytic model. The structures of the cured EPMB were characterized by H-1 NMR and solid-state C-13 NMR. The results showed there are polyene structures and hydrogen bonds in the cured EPMB. (c) 2006 Elsevier B.V. All rights reserved.