Triple-Shape Memory Materials Based on Cross-Linked Poly(ethylene vinyl acetate) and Poly(ε-caprolactone)

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• 作者：Zhi-xing Zhang ; Xiao Wei ; Jing-hui Yang ; Nan Zhang ; Ting Huang ; Yong Wang ; Xiao-ling Gao
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：November 30, 2016
• 年：2016
• 卷：55
• 期：47
• 页码：12232-12241
• 全文大小：624K
• ISSN：1520-5045

文摘

In this work, chemically cross-linked poly(ethylene vinyl acetate) (EVA) was melt-compounded with poly(ε-caprolactone) (PCL) to prepare the EVA/PCL blends. The chemical cross-linking reaction of EVA was induced by dicumyl peroxide (DCP) during the melt compounding processing. The effects of the cross-linking degree of the EVA component on the rheological properties, morphology, and melting and crystallization behavior of samples were systematically investigated. The results demonstrated that a morphological change from the quasi-cocontinuous structure to the typical cocontinuous structure was induced with increasing the cross-linking degree of the EVA components. Thermal properties measurements and dynamic mechanical properties measurements demonstrated that the EVA/PCL blends exhibited two independent thermal transitions. The shape memory behavior measurements showed that the samples exhibited excellent triple shape memory effects (triple-SME). The corresponding mechanisms were then analyzed.