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Licensed Unlicensed Requires Authentication Published by De Gruyter March 9, 2021

Thermo-Responsive Shape Memory Behavior of Methyl Vinyl Silicone Rubber/Olefin Block Copolymer Blends via Co-Crosslinking

Q. Ren, X. J. Wang, Y. Q. Zhao, L. Q. Xu, H. W. Yu, A. J. Ma and W. G. Zheng

Abstract

Shape memory polymers (SMPs) are developed by blending and cross-linking polymers which include crystalline domains and cross-linked networks. In this paper, we describe the morphology, thermal and shape memory behavior of methyl vinyl silicone rubber (MVMQ)/olefin block copolymer (OBC) blends prepared by a melt-blending and chemical cross-linking method. MVMQ without crystalline domains could not hold its temporary shape. After introducing the OBC, the obtained blends exhibited excellent dual shape memory properties. The cross-linking networks of MVMQ acted as reversible domains, while crystalline regions of OBC worked as fixed domains. When the blending ratio of MVMQ/OBC was 50/ 50, the blend had both a high shape fixity ratio and shape recovery ratio.


Yongqing Zhao, Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China


Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51703234), the Zhejiang Provincial Natural Science Foundation of China (LY17E030010), and the Natural Science Foundation of Ningbo City of China (2018A610219, 2018A610036, 2009A610159 and 2019A610143).

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Received: 2019-12-20
Accepted: 2020-06-09
Published Online: 2021-03-09
Published in Print: 2021-03-26

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