Novel Shape‐Memory Polymer with Two Transition Temperatures

• DOI: 10.1002/marc.200400640
• Publication Date: 2005-04-21T13:16:58Z
• Authors: Guoqin Liu; Xiaobin Ding; Yiping Cao; Zhaohui Zheng; Yuxing Peng
• Keywords: 01 natural sciences; 0104 chemical sciences

AbstractSummary: 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 Tm of the PEG crystal and the Tg of the semi‐IPN. Based on a reversible order‐disorder transition of the crystals below and above the Tm of PEG, and the large difference in storage modulus below and above the Tg 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.