Synthesis and Performance of a Double Network Self-healing Elastomer Based on Hydrogen Bonds and Diels-Alder Crosslinks

Yan Peng; Yu-jia Hou; Qiao-qiao Shen; Hui Wang; Gang Li; Guang-su Huang; Jin-rong Wu

doi:10.11777/j.issn1000-3304.2019.19140

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Synthesis and Performance of a Double Network Self-healing Elastomer Based on Hydrogen Bonds and Diels-Alder Crosslinks

更新时间：2021-01-26

- Synthesis and Performance of a Double Network Self-healing Elastomer Based on Hydrogen Bonds and Diels-Alder Crosslinks
- Acta Polymerica Sinica Vol. 51, Issue 2, Pages: 158-165(2020)
- 作者机构：
  
  1.四川大学高分子科学与工程学院高分子材料工程国家重点实验室　成都 610065
  2.中国核动力研究设计院反应堆燃料及材料重点实验室　成都 610041
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2019.19140
  CLC：
- Published：2020-2，
  
  Published Online：27 September 2019，
  
  Received：31 July 2019，
  
  Revised：23 August 2019，
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Yan Peng, Yu-jia Hou, Qiao-qiao Shen, Hui Wang, Gang Li, Guang-su Huang, Jin-rong Wu. Synthesis and Performance of a Double Network Self-healing Elastomer Based on Hydrogen Bonds and Diels-Alder Crosslinks. [J]. Acta Polymerica Sinica 51(2):158-165(2020)
DOI：

Yan Peng, Yu-jia Hou, Qiao-qiao Shen, Hui Wang, Gang Li, Guang-su Huang, Jin-rong Wu. Synthesis and Performance of a Double Network Self-healing Elastomer Based on Hydrogen Bonds and Diels-Alder Crosslinks. [J]. Acta Polymerica Sinica 51(2):158-165(2020) DOI： 10.11777/j.issn1000-3304.2019.19140.

摘要

基于氢键作用和Diels-Alder (DA)交联的双可逆网络，制备了一种高性能、高修复效率的自修复弹性体. 首先使用异氰酸正丁酯和

-(2-羟乙基)丙烯酰胺合成氨基甲酸酯小分子(简称为HM)，然后将HM、丙烯酸丁酯(BA)及甲基丙烯酸糠酯(FMA)共聚得到线形共聚物，最后用双马来酰亚胺(BMI)通过DA反应交联线形共聚物，得到既有氢键交联，又有DA键交联的双网络自修复弹性体. 当受到外力时，键能较低的氢键先断裂消耗能量，使得材料的韧性提高了6.2倍，断裂强度提高了12.3倍；而DA键则赋予了材料较高的弹性和形状回复能力. 除此之外，两重网络均为可逆网络，使材料的自修复效率高达98%.

Abstract

Intrinsic self-healing elastomers

which can automatically heal themselves after damage without the addition of other reagents

have recently attracted increasing attention. However

a trade-off commonly exists between high mechanical properties and high self-healing efficiency

which is always the bottle-neck in advancing these high performance self-healing elastomers. To solve this problem

a high performance and high self-healing efficiency elastomer was developed in this work based on hydrogen bonds and Diles-Alder (DA) crosslinks. Firstly

a monomer (HM) functionalized with amido bond and carbamic acid ester for the generation of hydrogen bonds was synthesized by

-butyl isocyanate and

-(2-hydroxyethyl)acrylamide. Next

one-pot free-radical copolymerization of HM

butyl acrylate (BA)

and furfuryl methacrylate (FMA) was carried out to afford a linear copolymer

which was only cross-linked with hydrogen bonds. Finally

bismaleimide (BMI) was used to crosslink the linear copolymer through DA reaction. A double network self-healing elastomer with two kinds of crosslinks

i.e.

hydrogen bonds and DA bonds

was thus prepared. The heating-up and cooling down FTIR spectroscopy was used to characterize the hydrogen bonds

while the existence of DA bonds was proved by FTIR

DSC

and DMA techniques. When an external force was applied

the hydrogen bonds broke firstly to dissipate energy

which helped to increase the toughness by about 6.2 times

the tensile strength by about 12.3 times

and Young’s modulus of the elastomer by about 26 times. Meanwhile

DA crosslinks endowed the elastomer with certain elasticity and the capability of fast shape recovery. Moreover

thanks to the reversible ability of hydrogen bonds and DA crosslinks

the elastomer exhibited a high self-healing efficiency up to 98%.

关键词

力学性能弹性体双网络自修复

Keywords

Mechanical propertiesSelf-healingElastomerDouble networks

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Department of Polymer Science and Engineering, Zhejiang University

College of Materials Science and Engineering, Qingdao University

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University

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