热可逆聚氨酯改性自修复环氧树脂的力学性能和自修复行为

doi:10.11896/cldb.22010044

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Abstract A thermo-reversible polyurethane-modified self-healing epoxy resin was manufactured successfully through introducing thermo-reversible polyurethane into Diels-Alder reaction-based self-healing epoxy resin. The bending behavior, impact toughness and self-healing performance of self-healing epoxy resin were reinforced prominently when thermo-reversible polyurethane was introduced. The thermo-reversible polyurethane-modified self-healing epoxy resin material exhibited the optimal performance when the introduced amount of thermo-reversible polyurethane was 20%. Cracks could be renovated by heat-treating at 130 ℃ for 12 min and 85 ℃ for 24 h once thermo-reversible polyurethane-modified self-hea-ling epoxy resin was damaged on account of external factors and cracks appeared. Moreover, the repair could be repeated. Results revealed that the repeated self-healing behavior was implemented by reason of synergistic effect of thermo-reversible Diels-Alder reaction, dissociation and regeneration of hydrogen bonds as well as thermal movement of molecular chains. The results had significant instruction for fabricating epoxy resin materials with both strong impact toughness and self-healing for micro-damages efficiently.

Key words： polyurethane epoxy resin toughness thermo-reversible self-healing

Published: 25 July 2023 Online: 2023-07-24

CLC number:

TQ323

Fund:National Natural Science Foundation of China (51463010) and West Light Support Project.

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	Articles by authors
	YE Jiaofeng
	WANG Fei
	ZHANG Junxiang
	ZUO Yang
	FENG Libang
	LUO Xiaoxiao

Cite this article:

YE Jiaofeng,WANG Fei,ZHANG Junxiang, et al. Mechanical Properties and Self-healing Behavior of Thermo-reversible Polyurethane-modified Self-healing Epoxy Resins[J]. Materials Reports, 2023, 37(14): 22010044-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22010044 OR http://www.mater-rep.com/EN/Y2023/V37/I14/22010044

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