Polymer networks with crystalline segments

SMP should be composed of two phases, i.e., a reversible and a fixed phase. Typically, the transition temperature of the reversible phase becomes the shape recovery temperature and hence its range and sensitivity are of practical significance for their processability. Therefore, any thermoplastic material. 

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Aharoni S M and Edwards S F (1994) Polyamide networks with stiff liquid-crystalline segments and trifurcated flexible jimctions, Polymer 35 1298-1305. Kirikihira I, Yamakawa H and Kubo Y (1994) Production of esteramide copoljoner, Japanese Patent 6207005, to Tosoh Corporation. 

This was utilized by Tian et al. [168] to prepare a new class of liquid crystal homopolymers of poly ll-[4-(3-ethoxycarbonyl-coumarin-7-oxy)-carbonyl-phenyloxy]-undecyl methacrylate] containing a coumarin moiety as a photocross-linkable unit. The preparations included polymers of various chain lengths. Also, hquid crystaUine-coil diblock and hquid crystalline-coil-liquid crystalline triblock copolymers with polystyrene as the coil segment were formed. The polymers were reported to have been synthesized with the aid of atom transfer radical polymerization. The dimerization of the coumarin moieties takes place upon irradiation with light of A > 300 nm to yield cross-linked network structures. 

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