聚醚接枝增韧改性环氧树脂防水密封材料研究

Research on epoxy resin waterproof sealing material modified by polyether grafting and toughening

朱剑南 ¹高立广 ²卢立群 ³缪志勇 ³钱玉德 ³李波 ⁴杨涛 ⁴孙德文⁴

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作者信息

1. 江苏省建筑科学研究院有限公司,江苏南京 210008
2. 徐州市公路事业发展中心,江苏徐州 221005
3. 江苏丰彩建材(集团)有限公司,江苏南京 211100
4. 江苏苏博特新材料股份有限公司,江苏南京 211103
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摘要

将相对分子质量为650的聚乙二醇单甲醚用于环氧树脂接枝增韧改性,红外光谱及有效接枝率分析表明,柔性聚醚链段有效接枝到环氧树脂基体中,有效接枝率达到70.1％～84.9％,改性环氧树脂冲击强度、断裂伸长率随聚醚接枝量的增加显著提高,拉伸强度及压缩强度在设定理论接枝量不超过10％时均处于较高水平,未出现显著下降,且冲击强度及断裂伸长率均得到了大幅提升,表明柔性聚醚对环氧树脂具有良好的增韧效果,可以提高环氧树脂防水密封材料的综合韧性.

Abstract

Polyethylene glycol monomethyl ether with molecular weight of 650 was used for the grafting and toughening modi-fication of epoxy resin.Infrared spectrum and effective grafting rate analysis showed that the flexible polyether chain segments were effectively grafted into the epoxy resin matrix,and the effective grafting rate reached 70.1％～84.9％.The impact strength and elongation at break of the modified epoxy resin significantly increased with the increase of the amount of polyether grafted.The tensile strength and compressive strength are at a high level when the theoretical grafting amount is less than 10％,and there is no significant decrease,and the impact strength and elongation at break are greatly improved,which indicates that flexible polyether has a good toughening effect on epoxy resin,and can improve the comprehensive toughness of epoxy resin waterproof sealing material.

关键词

环氧树脂/原位接枝/聚醚改性/冲击强度/密封防水

Key words

epoxy resin/in situ grafting/polyether modification/impact strength/sealed and waterproof

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基金项目

国家自然科学基金青年基金项目(52008188)

"十四五"国家重点研发计划项目(2021YFB2601000)

"十四五"国家重点研发计划项目(2021YFF0500803)

出版年

2024

新型建筑材料

中国新型建筑材料工业杭州设计研究院

新型建筑材料

CSTPCD

影响因子：0.569

ISSN：1001-702X

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