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Novel Shape-Memory Polymer with Two Transition Temperatures

✍ Scribed by Guoqin Liu; Xiaobin Ding; Yiping Cao; Zhaohui Zheng; Yuxing Peng

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
128 KB
Volume
26
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: This communication describes a novel kind of PMMA‐PEG semi‐interpenetrating network (semi‐IPN) which shows excellent shape‐memory behavior at two transition temperatures, the T~m~ of the PEG crystal and the T~g~ of the semi‐IPN. Based on a reversible order‐disorder transition of the crystals below and above the T~m~ of PEG, and the large difference in storage modulus below and above the T~g~ of the semi‐IPN, the polymer has a recovery ratio of 91 and 99%, respectively.

Shape‐memory phenomena of PMMA‐PEG2000 semi‐IPN.

magnified imageShape‐memory phenomena of PMMA‐PEG2000 semi‐IPN.

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