物理化学学报 >> 2005, Vol. 21 >> Issue (06): 681-685.doi: 10.3866/PKU.WHXB20050621

研究简报 上一篇    下一篇

酸酐固化环氧树脂/蒙脱土复合材料的等温固化动力学

杨超; 江学良; 孙康   

  1. 上海交通大学金属基复合材料国家重点实验室,上海 200030
  • 收稿日期:2004-10-26 修回日期:2004-12-03 发布日期:2005-06-15
  • 通讯作者: 孙康 E-mail:ksun@sjtu.edu.cn

Isothermal Cure Kinetics of Epoxy Resin/Montmorillionite Composites Cured by Acid Anhydride

YANG Chao; JIANG Xue-liang; SUN Kang   

  1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200030
  • Received:2004-10-26 Revised:2004-12-03 Published:2005-06-15
  • Contact: SUN Kang E-mail:ksun@sjtu.edu.cn

摘要: 用等温差示扫描量热法(DSC)研究了酸酐固化环氧树脂/蒙脱土复合材料的等温固化过程,考察了未处理的蒙脱土(MMT)和有机蒙脱土(OMMT)对环氧树脂固化动力学的影响. 实验表明, 环氧树脂的固化过程包含自催化机理,加入蒙脱土没有改变固化反应机理. 用Kamal方程对该体系的固化过程进行拟合,得到反应级数m、n,反应速率常数k1、k2,总反应级数(m + n)在2.4~3.0之间. MMT的加入使环氧树脂体系的k1、k2有所降低,而OMMT的加入对体系的k1、k2影响较为复杂,加入蒙脱土对环氧树脂固化体系的活化能影响较小.

关键词: 环氧树脂, 甲基四氢苯酐, 蒙脱土, 固化动力学

Abstract: The isothermal cure kinetics of the epoxy resin (EP)/montmorillionite composites, with anhydride as curing agent, was studied by means of differential scanning calorimetry (DSC), and the effects of original montmorillionite (MMT) and organic montmorillion (OMMT) on cure kinetics of epoxy resin were investigated. Analysis of DSC data indicated that curing process of the epoxy resin contains autocatalytic mechanism, the addition of the montmorillionite to the epoxy resin does not change the cure reaction mechanism. The curing process of the EP/montmorillionite composites was simulated by Kamal equation. Two reaction orders, m and n, and two rate constants, k1 and k2 were obtained. The overall reaction order, m + n, is in the range 2.4~3.0. The addition of the MMT to the epoxy resin decreases rate constants k1 and k2, but the OMMT makes rate constants k1 and k2 complicated. The cure activation energy of the epoxy resin varies slightly by the addition of montmorillionite.

Key words: Epoxy resin, Methyl tetrahydrophthalic anhydride, Montmorillionite, Cure kinetics