化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (1) : 190-193. DOI: 10.19817/j.cnki.issn 1006-3536.2021.01.042

科学研究

抗压缩聚硫代醚密封剂的制备及性能研究

章谏正, 任杰, 刘艺帆

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Preparation and performance of anti-compression polythioether sealant

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Received		Published
2020-08-09		2021-01-20
Issue Date	Revised Date
2021-01-27	2020-08-09

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摘要

采用“硫醇-烯”点击反应制备了一种新型高交联、低黏度聚硫代醚橡胶,数均分子量达到5611,分散系数仅为2.9,玻璃化转变温度达到-60℃。以此为基体制备密封剂,对比聚硫密封剂,聚硫代醚密封剂表现出优异的耐压缩性能,压缩蠕变量仅为5.19%;聚硫代醚密封剂的压缩永久变形率随试样高度的增加呈上升趋势,压力越大越容易产生蠕变变形,但总体增量不大。热循环后力学性能对比实验表明,聚硫代醚密封剂较聚硫密封剂表现出更为优异的耐高温性能,低温应力松弛试验表明,聚硫代醚密封剂具有更好的低温耐压缩性能。

Abstract

A new type of polythioether rubber with high crosslinking and low viscosity was prepared by thiol ene click chemical reaction.The number average molecular weight was 5611,the polydispersity index was only 2.9,and the glass transition temperature was -60℃.Compared with the polysulfide sealant,the polythioether sealant showed excellent compression resistance,and the compression creep variable was only 5.19%.the compression permanent deformation rate of the sealant increased with the increase of the sample height,and the greater the pressure,the easier the creep deformation was,but the overall increment was small.Compared with the mechanical properties after thermal cycling,the sealant had better high temperature resistance than polysulfide sealant.The low temperature stress relaxation test shown that the polythioether sealant had better low temperature compression resistance.

关键词

聚硫代醚 / 密封剂 / 压缩

Key words

polythioether / sealant / compression

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章谏正, 任杰, 刘艺帆. 抗压缩聚硫代醚密封剂的制备及性能研究[J]. 化工新型材料, 2021, 49(1): 190-193 DOI:10.19817/j.cnki.issn 1006-3536.2021.01.042

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参考文献

原文顺序 | 出版日期 | 本文引用

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