Research on Preparation and Properties of Self-healing Polyurethanes Based on Reversible Acylhydrazone Bonds

Chuan-ying SHI; Xiao-yue MA; Xiao-wen HUANG; Yang LIU; Yan-yan WEI

doi:10.14028/j.cnki.1003-3726.2019.09.005

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Research on Preparation and Properties of Self-healing Polyurethanes Based on Reversible Acylhydrazone Bonds

更新时间：2022-09-02

- Research on Preparation and Properties of Self-healing Polyurethanes Based on Reversible Acylhydrazone Bonds
- Polymer Bulletin Vol. 32, Issue 9, Pages: 45-57(2019)
- 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.1003-3726.2019.09.005
  CLC：
- Published：20 September 2019，
  
  Received：08 October 2018，
  
  Revised：15 July 2019，
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Chuan-ying SHI, Xiao-yue MA, Xiao-wen HUANG, Yang LIU, Yan-yan WEI. Research on Preparation and Properties of Self-healing Polyurethanes Based on Reversible Acylhydrazone Bonds. [J]. Polymer Bulletin 32(9):45-57(2019)
DOI：

Chuan-ying SHI, Xiao-yue MA, Xiao-wen HUANG, Yang LIU, Yan-yan WEI. Research on Preparation and Properties of Self-healing Polyurethanes Based on Reversible Acylhydrazone Bonds. [J]. Polymer Bulletin 32(9):45-57(2019) DOI： 10.14028/j.cnki.1003-3726.2019.09.005.

摘要

由双丙酮醇和对苯二甲酸二酰肼反应生成酰腙键得到羟基封端的功能性扩链剂（命名为AAD）。将亲水性良好且广泛应用于生物医用聚氨酯材料的二官能度多元醇（聚己内酯二元醇PCL-210）和三官能度聚醚多元醇（TEP-240）分别与MDI-50反应生成端异氰酸酯基团的聚氨酯预聚体，将二者按照一定比例混合，并加入AAD交联得到自修复聚氨酯。根据修复前后拉伸强度和断裂伸长率的恢复值表征其自修复性能，表明室温下修复24h后其拉伸强度恢复至94.6%，断裂伸长率恢复至原始试样的76.3%。

Abstract

The acylhydrazone compound (named AAD)

which is a hydroxyl terminated chain extender in PU

was synthesized using terephthalic dihydrazide and diacetone alcohol. The difunctional polyol (polycaprolactone diol PCL-210)and the trifunctional polyether polyol (TEP-240) which are hydrophilic and widely used in biomedical polyurethane materials

react with MDI-50 to produce isocyanate group-terminated polyurethane prepolyxmer respectively. The two pre-PU prepolymer with —NCO groups are mixed in a certain proportion and cross-linked with AAD to obtain a self-healing polyurethane. The self-repairing property was characterized by the recovery value of the tensile strength and the elongation at break before and after repair. It showed that the tensile strength recovered to 94.6% after 24 hours of repair at room temperature

and the elongation at break recovered to 76.3% of the original sample.

关键词

自修复pH敏感性可逆共价键交联型聚氨酯酰腙键

Keywords

Self-repairpH sensitivityReversible covalent bondCross-linked polyurethaneAcylhydrazone bond

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School of Pharmacy, Zunyi Medical University

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