Enhanced electrocaloric effect in poly(vinylidene fluoride- trifluoroethylene)-based terpolymer/copolymer blends

Xiang Zhong Chen, Xiao Shi Qian, Xinyu Li, S. G. Lu, Hai Ming Gu, Minren Lin, Qun Dong Shen, Q. M. Zhang

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Abstract

The electrocaloric effect in the blends of poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) with small amount of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) is investigated. It was found that small amount of P(VDF-TrFE) (∼10 wt. ) can cause a more than 10 increase in the crystallinity in the blends. Although the two polymers form separate crystalline phases, the interfacial couplings to the random defects in the terpolymer convert the normal ferroelectric P(VDF-TrFE) into a relaxor ferroelectric. As a result, the blends with 10 wt. of P(VDF-TrFE) exhibit a 30 increase in the adiabatic temperature change over the entire experimental temperature range (20 °C-60 °C).

Original languageEnglish (US)
Article number222902
JournalApplied Physics Letters
Volume100
Issue number22
DOIs
StatePublished - May 28 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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