基于氢化端羟基聚丁二烯和儿茶酚基团的聚氨酯的自修复及粘接性能研究  

Research on self-repair and bonding properties of polyurethane based on hydrogenated hydroxyl-terminated polybutadiene and catechol group

作　　者：朱军 常春[1] 魏柳荷[2] 李禹函 Zhu Jun;Chang Chun;Wei Liuhe;Li Yuhan(College of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;College of Chemistry,Zhengzhou University,Zhengzhou Key Laboratory of Elastic Sealing Materials,Zhengzhou 450001,Henan,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]郑州大学化学学院郑州市弹性密封材料重点实验室,河南郑州450001

出　　处：《中国胶粘剂》2022年第10期1-7,28,共8页China Adhesives

基　　金：中国博士后科学基金项目(2019M652572);郑州市协同创新重大专项(18XTZX12001)。

摘　　要：采用3,4-二羟基苯甲醛(DBA)和丝氨醇合成出含有儿茶酚基团的扩链剂,与氢化端羟基聚丁二烯(HHPB)、异佛尔酮二异氰酸酯(IPDI)合成了线型聚氨酯(HHPB-DS)。研究结果表明:聚烯烃性质的HHPB比聚四亚甲基醚(PTMEG)使微相分离程度更高,HHPB-DS的黏流转变温度为81℃,既表现出自修复特性又能用于热熔粘接;儿茶酚基团的引入赋予该材料对多种基材的良好粘接,尤其是对提升钢板粘接强度的效果显著;HHPB低表面能的特性起到保护硬段相作用,降低水分子对儿茶酚基团和氨基甲酸酯基间氢键的干扰作用,使得浸泡水3 d的粘接基材仍然能保持其粘接强度。Chain extender containing catechol group was synthesized from 3,4-dihydroxybenzaldehyde(DBA)and serinol,and then linear polyurethane(HHPB-DS)was synthesized with hydrogenated hydroxylterminated polybutadiene(HHPB)and isophorone diisocyanate(IPDI).The research results showed that the polyolefinic HHPB had a higher degree of microphase separation than that of polytetramethylene ether glycol(PTMEG).The viscous flow transition temperature of HHPB-DS was 81℃,which not only exhibited selfrepair properties but also could be used for hot melt bonding.The introduction of catechol group endowed the material with good bonding to a variety of substrates,especially to improve the bonding strength to steel plate.The HHPB with low surface energy played a role in protecting the hard segment phase and reducing the interference of water molecule on the hydrogen bond between carbamate group and catechol group so that the bonding strength of substrate could still be maintained even after immersed in water for 3 d.

关 键 词：儿茶酚 氢化端羟基聚丁二烯 耐水 自修复 粘接 

分 类 号：TQ433[化学工程]