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A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds

文献类型： 外文期刊

作者： Wu, Hai-Tao 1 ; Jin, Bi-Qiang 1 ; Wang, Hao 1 ; Wu, Wen-Qiang 1 ; Cao, Zhen-Xing 1 ; Yuan, Zhao-Yang 1 ; Huang, Yue 1 ; L 1 ;

作者机构： 1.Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China

2.Chinese Acad Trop Agr Sci, Guangdong Prov Key Lab Nat Rubber Proc, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China

关键词： Self-healing; Polyurethane; Disulfide bonds; Chain mobility; Phase morphology

期刊名称：CHINESE JOURNAL OF POLYMER SCIENCE （ 影响因子：3.603； 五年影响因子：2.59 ）

ISSN： 0256-7679

年卷期： 2021 年 39 卷 10 期

页码：

收录情况： SCI

摘要： Elastomers with outstanding strength, toughness and healing efficiency are highly promising for many emerging fields. However, it is still a challenge to integrate all these beneficial features in one elastomer. Herein, an asymmetric alicyclic structure adjacent to aromatic disulfide was tactfully introduced into the backbone of polyurethane (PU) elastomer. Specifically, such elastomer (PU-HPS) was fabricated by polycondensing polytetramethylene ether glycol (PTMEG), isophorone diisocyanate (IPDI) and p-hydroxydiphenyl disulfide (HPS) via one-pot method. The molecular mobility and phase morphology of PU-HPS can be tuned by adjusting the HPS content. Consequently, the dynamic exchange of hydrogen and disulfide bonds in the hard segment domains can also be tailored. The optimized sample manifests outstanding tensile strength (46.4 MPa), high toughness (109.1 MJ/m(3)), high self-healing efficiency after fracture (90.3%), complete scratch recovery (100%) and good puncture resistance. Therefore, this work provides a facile strategy for developing robust self-healing polymers.

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