一种实时监测环氧树脂固化过程中化学收缩的方法

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (1): 74-78.

一种实时监测环氧树脂固化过程中化学收缩的方法

杨喜,李书欣,王继辉^*,胡海晓

武汉理工大学材料科学与工程学院,武汉430070

收稿日期:2015-08-04 出版日期:2016-01-28 发布日期:2016-01-28
通讯作者: 王继辉(1962-),男,博士,教授,主要从事聚合物基复合材料力学研究,jhwang@whut.edu.cn。
作者简介:杨喜(1990-),男,硕士研究生,主要从事复合材料方面的研究。

A REAL-TIME MONITORING METHOD FOR THE CHEMICAL SHRINKAGE IN THE CURING PROCESS OF EPOXY RESIN

YANG Xi, LI Shu-xin, WANG Ji-hui^*, HU Hai-xiao

College of Material Science and Engineering, Wu Han University of Technology , Wuhan 430070, China

Received:2015-08-04 Online:2016-01-28 Published:2016-01-28

摘要/Abstract

摘要： 树脂固化过程中的化学收缩会使复合材料产生缺陷,而这些缺陷会极大降低复合材料的性能。本文在选用传统毛细管膨胀计的基础上通过添加一个对照瓶以及选用PE袋的做法,找到了一种快捷、高效、高精度、高适用性的化学收缩测试方法。通过建立化学收缩与固化度之间的联系,证实了化学收缩独立于温度和时间,仅与固化度呈现一种双线性关系。总体来看在固化度0.28(初步凝胶点)左右直线斜率发生变化,直线前半段斜率约为42.54,后半段斜率约为64.63,树脂完全固化时总的化学收缩率为7.55%。研究表明,上纬2511-1A/BS树脂体系凝胶后化学收缩率远大于凝胶前的化学收缩率。

关键词: 化学收缩, 固化度, 毛细管膨胀计, 环氧树脂

Abstract: Chemical shrinkage in the process of resin curing will cause composite material defects and these defects can greatly reduce the performance of the composite materials. According to this article, through the improvement method which adds a contrast bottle to the traditional capillary dilatometer as well as the selection of PE bag, a fast, efficient, high precision and high applicability test method of chemical shrinkage was found. Based on the contact of chemical shrinkage and degree of cure, it has been confirmed that the chemical shrinkage was independent with the temperature and time except for appearing only a bilinear relation with degree of cure. Overall, the line′s slope starts to change when the degree of cure is about 0.28 (initial gel point). The earlier stage slope is about 42.54. The later stage slope is about 64.63. The general chemical shrinkage rate is 7.55% after being completely cured. It also suggests that the rates of chemical shrinkage is greater after resin gelation.

Key words: chemical shrinkage, degree of cure, capillary dilatometer, epoxy resins

中图分类号:

TB332

杨喜,李书欣,王继辉,胡海晓. 一种实时监测环氧树脂固化过程中化学收缩的方法[J]. 玻璃钢/复合材料, 2016, 0(1): 74-78.

YANG Xi, LI Shu-xin, WANG Ji-hui , HU Hai-xiao. A REAL-TIME MONITORING METHOD FOR THE CHEMICAL SHRINKAGE IN THE CURING PROCESS OF EPOXY RESIN[J]. Fiber Reinforced Plastics/Composites, 2016, 0(1): 74-78.

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