Thermally stimulated shape memory behavior of (ethylene oxide-butylene terephthalate) segmented copolymer

The thermally stimulated shape memory behavior of ethylene oxide-butylene t erephthalate (EOBT) segmented copolymers with different soft segment molecu lar weight and hard segment content was investigated. The deformation recov ery ratio R-f of the EOBT samples increases with the soft segment molecular weight and the hard segment weight content, while the average overall defo rmation recovery speed V-r increases with the hard segment content. The tem perature of maximum deformation recovery speed (T-M) is determined by the m elting temperature of the soft segment crystals and the stability of the cr ystallized hard segment domains.