改性聚氨酯接缝材料的力学性能试验研究

发布时间：2018-02-14 14:15

  本文关键词： 聚氨酯 固化剂 力学性能 填料 热老化　出处：《水电能源科学》2017年09期 　论文类型：期刊论文

【摘要】：近年来对单组分聚氨酯材料的研究逐渐活跃,但固化时间较长,尤其使用疑为致癌物质的莫卡(MOCA)作为固化剂,制约了其应用范围。基于此,研究了其他固化剂对聚氨酯接缝材料的影响,通过添加填料改善其力学性能,进行实际工况中的弱碱性、热老化模拟试验。结果表明,添加3‰的三亚乙基二胺能使表干时间缩短3h,较大提高力学性能;填料的最佳添加比例为30%左右;老化温度高于80℃时,材料的力学性能呈现缓慢下降趋势,满足弱碱性环境使用要求。
[Abstract]:In recent years, the research on one-component polyurethane materials has become more and more active, but the curing time is relatively long, especially the use of MOCA, a suspected carcinogen, as the curing agent, which restricts its application. The effects of other curing agents on polyurethane joint materials were studied. The mechanical properties of polyurethane joints were improved by adding fillers, and the simulation tests of weak alkalinity and thermal aging were carried out in actual working conditions. The addition of 3 鈥，

本文编号：1510892