An electrostrictive high dielectric constant fluorinated terpolymer sheet fabricated by a melt and stretch extrusion process
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Lightweight and conformable electroactive polymers (EAPs) are promising for advanced electromechanical and dielectric applications such as actuators, artificial muscle systems, and high efficiency charge storage capacitors [1, 2, 3, 4, 5, 6, 7]. EAPs are especially attractive for polymer muscle applications and demonstrate several advantages over competing approaches, exhibiting ambient operation, rapid reaction speed (microseconds to minutes), and a high mechanical energy density (~10 J/cm3) [6, 8]. Polyvinilidyneflouride-trifluoroethylene (P(VDF-TrFE)) copolymers are piezoelectric and demonstrate piezoelectric properties, but are unable to achieve high strains. It has been demonstrated that by introducing defects in P(VDF-TrFE) through irradiation or introduction of a bulky non-blocking co-monomer unit such as 1,1-chlorofluoroethlene (CFE), the resulting P(VDF-TrFE-CFE) terpolymers transition into a ferroelectric relaxor and demonstrate a large electromechanical coupling and...
KeywordsExtrusion Process Suspension Polymerization Beta Phase PVDF Film Content PVDF
This study was partially supported by the NSF award ECCS-0644656. S-J.K. acknowledges the support of the Korean Ministry of Education, Science and Technology (The Regional Core Research Program/Chungbuk BIT Research-Oriented University Consortium).