环氧/酸酐体系网络结构对形状记忆性能的影响

doi:10.11896/cldb.19120004

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Abstract To explore the relationship between network structures and shape memory properties of amorphous matrix resin, epoxy/anhydride (bisphenol A diglycidyl ether/methyl Nadie anhydride, DGEBA/MNA) matrix systems of shape memory composites were studied. The tris (dimethy-laminomethyl) phenol (DMP-30) and zinc octoate were used as accelerators of DGEBA/MNA system to acquire different network structures by adjusting the matrix formula. Three kinds of network structures of cured samples, namely ester network, ether network and ester-ether mixed network, were determined by gel measurement before and after saponification. The dynamic thermomechanical properties of each system were tes-ted by dynamic mechanical analysis (DMA). Shape recovery ratio, shape recovery time and shape recovery force were used as indexes to cha-racterize the shape memory properties of the corresponding carbon fiber reinforced composites. The results show that the three kinds of network structures all have high shape recovery ratio, and the repeated thermodynamic cycle has little effect on shape recovery ratio of the three network structures; the shape recovery time of ester network, ether network and ester-ether mixed network increases in turn, while the shape recovery force decreases gradually. At the same time, at a lower recovery degree, the shape recovery force of the three kinds of network structures decreases with the increase of the fold-deploy times, while with the increase of recovery degree, the decline amplitude of the recovery force decreases gradually.

Key words： shape memory properties network structure epoxy anhydride

Published: 28 January 2021

CLC number:

TB332

About author:: Tian Mareceived her bachelor of engineering degree in June 2017 from Tongji University. From September 2017 to now, she has studied in Tongji University for master of engineering degree. Mainly engaged in the research of shape memory polymer and its composite materials.
Wenxiao Li, associate professor and master mentor of School of Aerospace Engineering and Applied Mecha-nics, Tongji University. Her interests are the design, preparation and performance research of shape memory polymer matrix composites and composite & foam compounded sandwich structures.

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Cite this article:

MA Tian,HE Pengfei,LI Wenxiao. Shape Memory Properties of Epoxy/Anhydride Systems with Different Network Structures[J]. Materials Reports, 2021, 35(2): 2145-2150.

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http://www.mater-rep.com/EN/10.11896/cldb.19120004 OR http://www.mater-rep.com/EN/Y2021/V35/I2/2145

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