Curing kinetics of phenolphthalein-aniline-based benzoxazine investigated by non-isothermal differential scanning calorimetry

被引:44
作者
Bai, Yun [1 ]
Yang, Po [1 ]
Zhang, Shuai [1 ]
Li, Yiqiao [1 ]
Gu, Yi [1 ]
机构
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China
基金
美国国家科学基金会;
关键词
Phenolphthalein-aniline-based benzoxazine; Curing kinetics; Activation; Autocatalytic curing; EPOXY-RESINS; PHOTOOXIDATIVE DEGRADATION; ISOCONVERSION METHODS; THERMAL-PROPERTIES; ACTIVATION-ENERGY; DSC DATA; POLYBENZOXAZINES; CURE; THERMOSET; AMINE;
D O I
10.1007/s10973-015-4544-x
中图分类号
O414.1 [热力学];
学科分类号
摘要
To understand the curing processes of phenolphthalein-aniline-based benzoxazine (BP-a), the curing kinetics of bisphenol A-aniline-based benzoxazine and BP-a were investigated using non-isothermal differential scanning calorimetry (DSC) at different heating rates. Kissinger, Ozawa, Friedman and Flynn-Wall-Ozawa methods were used to determine the kinetic parameters and built the kinetic models. According to the results, BP-a displays two dominant curing processes, namely the autocatalytic curing process at low-temperature curing (reaction (1)) with the average activation energy of 95.0-98.5 and nth-order curing process at elevated temperature curing (reaction (2)) with the average activation energy of 124.0-126.2 kJ mol(-1). Moreover, the predicted curves from the kinetic models fit well with the non-isothermal DSC curve. Non-isothermal differential scanning calorimetry is a promising method to help researchers explore the application of BP-a and other arylamine Mannich bridge structures containing polybenzoxazines.
引用
收藏
页码:1755 / 1764
页数:10
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