Abstract

Vinylidene fluoride (VDF) and trifluoroethylene (TrFE) copolymers are ferroelectric materials and exhibit ferroelectric to paraelectric phase transitions. In order to understand the ferroelectric phase transition of polymers, we performed Monte Carlo simulations for the three states model which an extra freedom was added to Ising model. The simulations reproduced the characters of the ferroelectric phase transition of VDF/TrFE copolymers. The temperature dependence of the specific heat obtained by MC simulations revealed that the transition changed from a first order transition to a diffuse one and that the critical phenomena existed between them.

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