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Shape Memory Properties in Poly(ethylene oxide)–Poly(ethylene terephthalate) Copolymers

✍ Scribed by Mingtai Wang; Xiaolie Luo; Xiaoyun Zhang; Dezhu Ma

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
270 KB
Volume
8
Category
Article
ISSN
1042-7147

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✦ Synopsis

Memory effects of several copolymers of poly(ethylene oxide) (PEO) and poly(ethylene terephthalate) (PET) were illustrated with photos, determined with shrinkage experiments and characterized by the recovery of samples to their original figures. Copolymers of appropriate composition could undertake an approximately full recovery which is tightly related to the annealing temperature at which shrinkage of samples occurs to some extent. Melting and recrystallization of PEO segments may be responsible for the memory effect. The memory properties of samples almost kept unchanged after many fatigue cycles (e.g. 15-20 cycles), which could make these copolymers useful in practical applications as novel shape memory materials.

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