Kinetics study of imidazole-cured epoxy-phenol resins
Kinetics study of imidazole-cured epoxy-phenol resins
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DOI：
10.1002/(sici)1099-0518(19990815)37:16
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发表时间：
1999-08-15
影响因子：
--
通讯作者：
Lin, KF
中科院分区：
文献类型：
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作者：
Chen, YC;Chiu, WY;Lin, KF
采用差示扫描量热法研究了不同浓度咪唑和双酚A固化双酚A二缩水甘油酯醚（DGEBA）的反应动力学。对动态DSC和等温DSC进行了研究。发现两种引发机制在固化反应中起作用。一种是基于吡啶型氮与环氧基形成加合物，另一种是基于咪唑与双酚a的离子配合物。随后的增殖由三个主要反应组成，即环氧化物/苯酚反应、酸/碱反应和环氧化物/R-O反应。建立了一个广义的动力学模型，并用于预测在咪唑和双酚A浓度和固化温度范围内环氧化物基团的转化。(C) 1999 John Wiley & Sons, Inc
The reaction kinetics of diglycidyl ether of bisphenol A (DGEBA) cured with different concentrations of imidazole and bisphenol A (BPA) were investigated by using differential scanning calorimetry. Both dynamic and isothermal DSC were studied. Two initiation mechanisms were found to play roles in the-curing reactions. One was based on adduct formation of epoxy groups with pyridine-type nitrogen and the other was based on ionic complexes of imidazole and BPA. The subsequent propagation was composed of three main reactions, viz. the epoxide/phenol reaction, the acid/base reaction, and the epoxide/R-O- reaction. A generalized kinetics model was developed and used to predict the conversion of epoxide groups using a wide range of imidazole and BPA concentrations, and cure temperature. (C) 1999 John Wiley & Sons, Inc.