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).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)