具有相分离结构的PMMA/PEG半互穿网络形状记忆高分子

doi:10.11896/cldb.19010200

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Abstract In this work, in-situ polymerization of linear polyethylene glycol (PEG) with different molecular weights, methacrylate (MMA) monomers and crosslinking agent was carried out by a one-step approach, in order to prepare the shape memory polymer of poly(methyl methacrylate)/polyethylene glycol semi-interpenetrating networks (PMMA/PEG semi-IPNs) with phase separation structure. The thermal properties, dynamic mechanical properties and mechanical properties of PMMA/PEG semi-IPNs shape memory polymers with diverse molecular weights of PEG were investigated by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and stress-strain analysis. Furthermore, DMA was also employed to study the double shape memory effect and triple shape memory effect of the PMMA/PEG semi-IPNs. It was found that the PMMA/PEG semi-IPNs shape memory polymer showed both crystal phase of PEG and amorphous phase region of the composite network. Thanks to the melting temperature of PEG crystal that located in the glass transition temperature zone, the shape memory performance of the semi-IPNs could be synergistically enhanced, and both the fixed rate and the recovery rate of semi-IPNs exceeded 99%. Accordingly, exceptional triple shape memory effect can be achieved by taking these two thermal transitions as the switching phase of shape memory. Additionally, the mechanism of triple shape memory effect of PMMA/PEG semi-IPNs was expounded.

Key words： shape memory polymer phase separation semi-interpenetrating polymer network triple shape memory effect

Published: 03 January 2020

CLC number:

TB381

About author:: Xingjian Li is currently a lecturer in Linyi University. He received his Ph.D. degree from Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences in 2016, and then studied as a post-doctor at Zhejiang University. In 2018, he taught in the School of Mate-rials Science and Engineering, Linyi University, as a high-level doctor. He has published more than 40 journal papers as first author or corresponding author. His research interests focus on the shape memory polymer.

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	LI Xingjian
	BAI Baoshi
	LIU Sheng
	MIAO Yujie
	ZHENG Zhaohui
	DING Xiaobin

Cite this article:

LI Xingjian,BAI Baoshi,LIU Sheng, et al. PMMA/PEG Semi-interpenetrating Network Shape Memory Polymer with Phase Separation Structure[J]. Materials Reports, 2020, 34(2): 2142-2146.

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http://www.mater-rep.com/EN/10.11896/cldb.19010200 OR http://www.mater-rep.com/EN/Y2020/V34/I2/2142

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