化工学报 ›› 2014, Vol. 65 ›› Issue (3): 929-933.DOI: 10.3969/j.issn.0438-1157.2014.03.023

• 催化、动力学与反应器 • 上一篇    下一篇

苯并(口恶)嗪改性环氧酸酐体系的固化机理及动力学

廖进彬1,2, 姜其斌1,2, 曾智1, 李鸿岩1,2   

  1. 1 株洲时代新材料科技股份有限公司, 湖南 株洲 412007;
    2 湖南工业大学包装与材料工程学院, 湖南 株洲 412007
  • 收稿日期:2013-06-13 修回日期:2013-07-14 出版日期:2014-03-05 发布日期:2014-03-05
  • 通讯作者: 姜其斌
  • 作者简介:廖进彬(1989—),男,硕士研究生。

Curing mechanism and kinetics of epoxy/anhydride system modified by benzoxazine

LIAO Jinbin1,2, JIANG Qibin1,2, ZENG Zhi1, LI Hongyan1,2   

  1. 1 Zhuzhou Times New Material Technology Co., Ltd., Zhuzhou 412007, Hunan, China;
    2 School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan, China
  • Received:2013-06-13 Revised:2013-07-14 Online:2014-03-05 Published:2014-03-05

摘要: 利用一种二胺型苯并(口恶)嗪改性环氧酸酐体系。通过FT-IR和DSC分析了改性体系的固化机理。结果表明:共混树脂体系在固化时存在两个反应,首先是环氧树脂与足量的酸酐在咪唑作用下在100℃先开始固化,并在150℃固化2 h后固化完全,之后苯并(口恶)嗪在180℃发生开环聚合。用非等温DSC法研究了该共混体系的固化动力学。采用Flynn-Wall-Ozawa方法求出了共混体系在固化时两个固化反应的活化能,分别为65.27 kJ·mol-1和92.8 kJ·mol-1,并利用Friedman方法判断了两个反应都是自催化反应,计算得到自催化模型曲线与实验曲线能较好地吻合。

关键词: 苯并(口恶)嗪, 环氧树脂, 酸酐, 固化机理, 固化反应动力学

Abstract: An epoxy/anhydride system was modified by aromatic diamine-based benzoxazine. The curing mechanism of the system was analyzed with Fourier transform infrared spectroscopy(FT-IR)and differential scanning calorimetry (DSC). The blend system exhibited two curing reactions in the curing process. Epoxy resin first cured with sufficient anhydride catalyzed by imidazole at 100℃, and cured completely at 150℃ for 2 h. Benzoxazine underwent ring-opening polymerization at 180℃. The curing kinetics of modified resin system was studied with non-isothermal DSC at different heating rates. The average activation energies of two reactions were calculated utilizing the Flynn-Wall-Ozawa method to be 65.27 kJ·mol-1 and 92.8 kJ·mol-1, respectively. Both curing reactions were found to be autocatalytic processes by the Friedman method, and the predicted curves from the autocatalytic model fitted well with those of experiments.

Key words: benzoxazine, epoxy resin, anhydride, curing mechanism, curing kinetics

中图分类号: