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Novel Shape‐Memory Polymer with Two Transition Temperatures
Author(s) -
Liu Guoqin,
Ding Xiaobin,
Cao Yiping,
Zheng Zhaohui,
Peng Yuxing
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400640
Subject(s) - shape memory polymer , materials science , interpenetrating polymer network , peg ratio , polymer , shape memory alloy , dynamic mechanical analysis , modulus , polymer chemistry , composite material , chemical engineering , finance , engineering , economics
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.