文献类型：期刊文献

中文题名：液体橡胶增韧环氧树脂的力学性能及增韧机理

英文题名：Mechanical Properties and Toughening Mechanism of Rubber Toughening Epoxy Resin

作者：周恒石[1];徐世爱[1]

机构：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海市先进聚合物材料重点实验室,上海200237

年份：2013

卷号：29

期号：11

起止页码：50

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;EI(收录号：20140117165901);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金资助项目(51073052)

语种：中文

中文关键词：环氧树脂;液体橡胶;力学性能;增韧机理

外文关键词：epoxy resin; liquid rubber; mechanical properties; toughening mechanism

摘要：比较了3种不同的液体橡胶增韧环氧树脂复合材料的力学性能,用电镜观察了复合材料的形态结构以及冲击断面的形貌,并据此提出了增韧机理。结果表明,随着橡胶含量的增加,复合材料的拉伸强度不断降低,而冲击强度呈现出先增加后降低的趋势;液体橡胶中丙烯腈的含量越高,对环氧树脂的增韧效果越好。而且,丙烯腈含量不同的橡胶,其增韧机理也明显不同。此外,将橡胶粒子的尺寸与基体交联网络的网格尺寸相关联,讨论了不同尺寸的橡胶粒子对交联网络的影响,从而解释了橡胶粒子尺寸对基体性能的影响。
The toughening effects of three kinds of liquid rubber on epoxy were investigated. It is shown that the yield stress of composites decreases with the liquid rubber content increasing, while impact strength exhibits the maximum value in the range from 10phr to 15phr rubber inclusion. The liquid rubber with higher acrylonitrile content exhibits better toughening effect, and the toughening mechanisms are mainly matrix shear deformation and track pinning. For the liquid rubber with lower acrylonitrile content, the cavitation of rubber particles and subsequent void growth by matrix shear deformation are predominant toughening mechanisms. Besides, the size of the rubber particles is correlated with the mesh size of the cross-linking network of the epoxy matrix in order to interpret the size effect of rubber particles on the properties of the composites.