固化剂类型与助剂对桥梁用环氧结构胶湿热老化性能的影响

The Study on the Influencing of Curing Agent Type and Additives on Wet and Heat Aging Performance of Bridges with Epoxy Structural Adhesive

耐湿热老化性能是结构胶,尤其是桥梁加固用结构胶的重要性能之一。采用两种快速老化试验(80℃水浸7 d和90℃水浸3 d、5 d、7 d),考察了两种类型的固化剂对环氧结构胶耐湿热老化性能的影响,同时考察了分别掺入增韧剂和偶联剂对两类固化剂制备的环氧结构胶耐湿热老化性能的影响。试验结果表明:80℃水浸7 d后,固化剂为聚酰胺类时,不掺助剂的强度保持率为76.91%,掺增韧剂的强度保持率提高了1.27%,掺偶联剂的强度保持率提高了3.28%;固化剂为脂环胺类时,不掺助剂的强度保持率为132.16%,而掺增韧剂的强度保持率降低了6.25%,掺偶联剂的强度保持率降低了13.68%。

This paper used two kinds of fast aging tests to study the influence of two kinds of curing agent types on wet and heat aging resistance performance of epoxy structural adhesive. It also respectively added toughening agent and coupling agent to examine the effect of two types of preparative curing agents on wet and heat aging resistance performance of epoxy structural adhesive.