Self-healing polyurethane based on disulfide bond and hydrogen bond

被引：170

作者：

Jian, Xiaoxia ^{[1
]}

Hu, Yiwen ^{[1
]}

Zhou, Weiliang ^{[1
]}

Xiao, Leqin ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China

来源：

POLYMERS FOR ADVANCED TECHNOLOGIES | 2018年 / 29卷 / 01期

关键词：

disulfide metathesis; hydrogen bond; mechanical property; polyurethane; self-healing; SEGMENTED POLYURETHANES; DIISOCYANATE SYMMETRY; MORPHOLOGY; NETWORKS; POLYMERS;

D O I：

10.1002/pat.4135

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Tough and transparent polyurethane networks with self-healing capability at mild temperature conditions were successfully prepared in a 1-pot procedure. The self-healing ability of synthesized polyurethane comes from the covalent disulfide metathesis and non-covalent H-bonding. The mechanical testing indicates that disulfide metathesis reforms the covalent bonds on a longer time scale, while H-bonding gives rise to a healing efficiency of around 46% in the early healing processing. The compromise between mechanical performance and healing capability is reached by tailoring the concentration of disulfide. The tensile strength of the sample with 100% self-heal efficiency can get to 5.01MPa, which can be explained by higher mobility of polymer chain under ambient temperature from creep testing.

引用

页码：463 / 469

页数：7

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