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

Hai-Tao Wu; Bi-Qiang Jin; Hao Wang; Wen-Qiang Wu; Zhen-Xing Cao; Zhao-Yang Yuan; Yue Huang; Wei-Hang Li; Guang-Su Huang; Lu-Sheng Liao; Jin-Rong Wu

doi:10.1007/s10118-021-2607-y

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

ARTICLE | Updated：2021-07-29

- A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds
- Chinese Journal of Polymer Science Vol. 39, Issue 10, Pages: 1299-1309(2021)
- Affiliations：
  
  a.State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineerng, Sichuan University, Chengdu 610065, China
  b.Guangdong Provincial Key Laboratory of Natural Rubber Processing, Agricultural Products Processing Research Institute of Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524001, China
- Author bio：
  
  276491692@qq.com (L.S.L.)
  wujinrong@scu.edu.cn (J.R.W.)
- Funds：
- DOI：10.1007/s10118-021-2607-y
  CLC：
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Hai-Tao Wu, Bi-Qiang Jin, Hao Wang, et al. A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds. [J]. Chinese Journal of Polymer Science 39(10):1299-1309(2021)
DOI：

Hai-Tao Wu, Bi-Qiang Jin, Hao Wang, et al. A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds. [J]. Chinese Journal of Polymer Science 39(10):1299-1309(2021) DOI： 10.1007/s10118-021-2607-y.

摘要

Abstract

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.

关键词

Keywords

Self-healingPolyurethaneDisulfide bondsChain mobilityPhase morphology

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