羧基官能化聚丁二烯:点击化学合成及对环氧树脂的固化机理

doi:10.11896/j.issn.1005-023X.2018.06.024

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Abstract The carboxyl-functionalized polybutadiene(PBu-COOH) was synthesized via a thiol-ene click-chemical method, and was subsequently used as a curing agent to produce a series of epoxy thermosets with different adding amount of PBu-COOH. The chemical structure of the resultant PBu-COOH was characterized by means of ¹H NMR and Fourier transform infrared spectroscopy (FTIR). In addition, the curing mechanism of epoxy resin with the presence of PBu-COOH and chemical structure of epoxy thermosets were studied via FTIR. The thermal properties of polybutadiene and PBu-COOH were also obtained by differential scanning calorimetry (DSC). Our experiment confirmed the successful synthesis of PBu-COOH, and the higher glass transition temperature (T_g) of PBu-COOH compared with polybutadiene. The tentative curing mechanism of PBu-COOH is the cross-linking of epoxy resin through the ring-opening reaction between multi-carboxyl and epoxy groups which results in the generation of hydroxyl and ester groups. It was observed that a relatively low curing agent/resin mass ratio (3∶7) could make epoxy resin cross-link completely.

Key words： click chemistry polybutadiene curing agent epoxy resin thermosets

Published: 25 March 2018

CLC number:	TB324
	O632.51

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	Articles by authors
	LI Junhui
	LIAO Zhijin
	LI Zhijun
	LIAO Shuangquan
	YU Rentong

Cite this article:

LI Junhui,LIAO Zhijin,LI Zhijun, et al. Carboxyl-functionalized Polybutadiene: Click-chemical Synthesis and Curing Mechanism for Epoxy Resin[J]. Materials Reports, 2018, 32(6): 983-986.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.06.024 OR http://www.mater-rep.com/EN/Y2018/V32/I6/983

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