Synthesis and Characterization of Cross-linked Self-healable Polyurethane Elastomer Containing Disulfide Bonds

Xiao-wen HUANG; Shi-yu ZHANG; Kai-feng ZHAO; Ya-peng BAI; Yan-yan WEI

doi:10.14028/j.cnki.1003-3726.2018.05.009

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Synthesis and Characterization of Cross-linked Self-healable Polyurethane Elastomer Containing Disulfide Bonds

更新时间：2022-09-05

- Synthesis and Characterization of Cross-linked Self-healable Polyurethane Elastomer Containing Disulfide Bonds
- Polymer Bulletin Vol. 31, Issue 5, Pages: 67-72(2018)
- 作者机构：
  
  青岛科技大学高分子科学与工程学院, 青岛 266042
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2018.05.009
  CLC：
- Published：20 May 2018，
  
  Received：25 August 2017，
  
  Revised：22 March 2018，
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Xiao-wen HUANG, Shi-yu ZHANG, Kai-feng ZHAO, Ya-peng BAI, Yan-yan WEI. Synthesis and Characterization of Cross-linked Self-healable Polyurethane Elastomer Containing Disulfide Bonds. [J]. Polymer Bulletin 31(5):67-72(2018)
DOI：

Xiao-wen HUANG, Shi-yu ZHANG, Kai-feng ZHAO, Ya-peng BAI, Yan-yan WEI. Synthesis and Characterization of Cross-linked Self-healable Polyurethane Elastomer Containing Disulfide Bonds. [J]. Polymer Bulletin 31(5):67-72(2018) DOI： 10.14028/j.cnki.1003-3726.2018.05.009.

摘要

采用预聚法，以多官能度聚醚多元醇和异佛尔酮二异氰酸酯为原料，β-巯基乙醇为封端剂制备多官能度巯基封端聚氨酯低聚物，利用NaI/H2O2将巯基氧化为双硫键，获得含双硫键的交联型聚氨酯。通过FT-IR研究了产物的化学结构及组成，采用拉伸测试和对比试验等测试方法对自修复条件、自修复效率以及双硫键和氢键在自修复过程中的作用进行了分析。结果表明，制得的含脂肪族双硫键的交联聚氨酯可以在室温下实现高效自修复，而且不需要额外的催化剂和外界刺激条件。用刀片将试样切成两半后对接紧密在自然光线下放置48h后拉伸强度可恢复到原来的95%，断裂伸长率恢复到原来的100%。其中，聚氨酯的氨基甲酸酯键之间形成的氢键提供30%左右的自修复效率。

Abstract

By Prepolymer Process

the polyfunctional thiol terminated polyurethane oligomer was prepared with polyfunctional polyether polyols

isophorone diisocyanate(IPDI)

and by adding an end-capping reagent-mercaptoethanol. The crosslinked polyurethane containing disulfide bonds was then polymerized by oxidative coupling of the thiol moieties using sodium iodide/hydrogen peroxide.The resultant polymers were characterized by FT-IR. The effect of self-healing condition

self-healing efficiency

the function of disulfide bond and hydrogen bond in self-healing process were analyzed by means of tensile test and contrast test

etc. The results showed that the crosslinked polyurethane containing aliphatic disulfide bonds can achieve efficient self-healing at room temperature

and does not require additional catalyst and external stimulus.After being cut in half with a razor blade and simple contact

the samples were exposed to natural light for 48 hours

the tensile strength can be restored to 95% of the original

and the elongation at break can be restored to 100% of original. which hydrogen bonds among urethane moieties contributed up to about 30% of the healing efficiency.

关键词

交联型聚氨酯巯基双硫键自修复动态可逆共价键

Keywords

Crosslinked polyurethanesThiolDisulfideSelf-healingDynamic reversible covalent bond

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