Microphase Separation Structure and Properties of Self-healing Polyurethane Elastomers Based on Hierarchical Hydrogen Bonds

Yong Xiong; Yun-liang Jiang; Yu-min Dong; Jing-yue Deng; Jian-ping Zhou; Bing-hua Zhou; Hong-bo Liang

doi:10.11777/j.issn1000-3304.2024.24219

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Microphase Separation Structure and Properties of Self-healing Polyurethane Elastomers Based on Hierarchical Hydrogen Bonds

Research Article | 更新时间：2025-02-27

- Microphase Separation Structure and Properties of Self-healing Polyurethane Elastomers Based on Hierarchical Hydrogen Bonds
- Acta Polymerica Sinica Vol. 56, Issue 3, Pages: 487-500(2025)
- 作者机构：
  
  1.南昌航空大学材料科学与工程学院南昌 330063
  2.湖北三江航天江北机械工程有限公司孝感 432000
  3.苏州基亿科技有限公司苏州 215009
  4.江西师范大学化学工程学院南昌 330022
- 作者简介：
  
  Yun-liang Jiang, E-mail: jiangyunliang@nchu.edu.cn
  Bing-hua Zhou, E-mail: zhoubh@jxnu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2024.24219
  CLC：
- CSTR：32057.14.GFZXB.2024.7307
- Received：24 August 2024，
  
  Accepted：2024-11-05，
  
  Published Online：22 January 2025，
  
  Published：20 March 2025
- 稿件说明：
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熊勇, 姜昀良, 董育民, 邓景月, 周建萍, 周炳华, 梁红波. 基于分级氢键的自修复聚氨酯弹性体的微相分离结构与性能研究. 高分子学报, 2025, 56(3), 487-500

Xiong, Y.; Jiang, Y. L.; Dong, Y. M.; Deng, J. Y.; Zhou, J. P.; Zhou, B. H.; Liang, H. B. Microphase separation structure and properties of self-healing polyurethane elastomers based on hierarchical hydrogen bonds. Acta Polymerica Sinica, 2025, 56(3), 487-500
熊勇, 姜昀良, 董育民, 邓景月, 周建萍, 周炳华, 梁红波. 基于分级氢键的自修复聚氨酯弹性体的微相分离结构与性能研究. 高分子学报, 2025, 56(3), 487-500 DOI： 10.11777/j.issn1000-3304.2024.24219. CSTR： 32057.14.GFZXB.2024.7307.

Xiong, Y.; Jiang, Y. L.; Dong, Y. M.; Deng, J. Y.; Zhou, J. P.; Zhou, B. H.; Liang, H. B. Microphase separation structure and properties of self-healing polyurethane elastomers based on hierarchical hydrogen bonds. Acta Polymerica Sinica, 2025, 56(3), 487-500 DOI： 10.11777/j.issn1000-3304.2024.24219. CSTR： 32057.14.GFZXB.2024.7307.

摘要

含氢键的聚氨酯(PU)弹性体具有优异的自修复能力和力学性能. 在弹性体主链和侧链引入多重氢键，构建的分级氢键体系能进一步提高自修复弹性体的综合性能. 本研究制备了含草酰胺基团的扩链剂

-双(2-羟乙基)草酰胺(BHO)和含四重氢键的扩链剂1(6-(3-(1

3-二羟基-2-甲基丙烷-2-基)脲基)己基)-3-(6-甲基-4-氧-1

4-二氢嘧啶-2-基)脲基(UPy-(OH)

))，基于2种扩链剂的复配合成了一系列含分级氢键的聚氨酯弹性体(PU-B

). 通过调控2种扩链剂的比例，探究侧链UPy含量对弹性体性能的影响. 结果表明：相较于未引入侧链UPy基团的PU-B，引入适量侧链UPy基团的PU弹性体(PU-B8U2)，其强度由(22.21±1.67) MPa增加到(40.62±3.46) MPa. 韧性由(87.44±4.43) MJ·m

-3

提升到(156.11±5.31) MJ·m

-3

. 除此之外，PU-B8U2在100 ℃下30 min内可实现划痕修复完全. 并且在100 ℃下修复1 h后，PU膜的修复效率达到89.4%.

Abstract

The hydrogen-bonded polyurethane (PU) e

lastomers possess excellent self-healing ability and mechanical properties. By introducing multiple bonds into the main chain and side chains of the elastomers

the hierarchical hydrogen-bonding system can further improve the comprehensive performance of the self-healing elast. In this work

the chain extenders

-bis(2-hydroxyethyl) oxamide (BHO) and 1-(6-(3-(1

3-dihydroxy-2-methylpropane-2-yl) ureido)hexyl)‍-3-‍(6-methyl-4oxo-1

4-dihydropyrimidine-2-yl) urea (UPy-‍(OH)

) were prepared

and a series of PU elastomers with hierarchical hydrogen bonds (PU-B

) were synthesized by using the two chain extenders. The effects of the content of side UPy groups on the properties of the elastomers were investigated by adjusting the ratio of the two chain extenders. The results showed that

compared with PU-B side chain UPy groups

the strength of the PU elastomer with an appropriate amount of side chain UPy groups (PU-B8U2) increased from (22.21±1.67) MPa to (40.62±3.46) MPa

and the toughness was improved from (87.44±4.43) MJ·m

-3

to (156.11±5.31) MJ·m

-3

. In addition

PU-B8U2 can achieve complete scratch healing within 30 min at 100 ℃. Moreover

the healing efficiency of the film can reach 89.4% after 1 h at 100 ℃.

关键词

Keywords

references

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