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论文类型:期刊论文
发表时间:2017-05-01
发表刊物:CHINESE CHEMICAL LETTERS
收录刊物:SCIE、CSCD
卷号:28
期号:5
页面范围:1069-1073
ISSN号:1001-8417
关键字:Ionic liquid; Phthalonitrile resin; Phthalazinone; Thermal stability; Curing agent
摘要:Combined with the advantages of low melting point, high thermal stability and strong acidity, a multiple-SO3H functioned ionic liquid (MIL) was developed successfully as a curing agent to promote the curing reaction of phthalonitrile-terminated poly(phthalazinone ether nitrile) (PPEN-Ph). The curing kinetics over differential scanning calorimetry (DSC) showed that both the initial curing temperature T-po' and apparent activation energy Ea' (based on Kissinger equation) were reduced significantly over MIL (207.9 degrees C and 101.5 kJ/mol) compared to the common curing agent ZnCl2 (268.5 degrees C and 201.5 kJ/mol). Moreover, under identical curing conditions, the resulting thermosetting resin over former (T-d5%= 526.1 degrees C) showed better thermal stability than that over latter (T-d5%= 512.1 degrees C). These results indicated that MIL should be a good candidate as a curing agent for phthalonitrile resins. (C) 2016 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.