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Shape‐Memory PVDF Exhibiting Switchable Piezoelectricity
Author(s) -
Hoeher Robin,
Raidt Thomas,
Novak Nikola,
Katzenberg Frank,
Tiller Joerg C.
Publication year - 2015
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201500410
Subject(s) - polyvinylidene fluoride , materials science , piezoelectricity , shape memory alloy , composite material , shape memory polymer , polymer , phase (matter) , transformation (genetics) , chemistry , organic chemistry , biochemistry , gene
In this study, a material is designed which combines the properties of shape‐memory and electroactive polymers. This is achieved by covalent cross‐linking of polyvinylidene fluoride. The resulting polymer network exhibits excellent shape‐memory properties with a storable strain of 200%, and fixity as well as recovery values of 100%. Programming upon rolling induces the transformation from the nonelectroactive α‐phase to the piezoelectric β‐phase. The highest β‐phase content is found to be 83% for a programming strain of 200% affording a d 33 value of −30 pm V −1 . This is in good accordance with literature known values for piezoelectric properties. Thermal triggering this material does not only result in a shape change but also renders the material nonelectroactive.