"Telechelic" Ferroelectric Fluoro Terpolymers With High Chemical Reactivity and Large Electromechanical Response at Ambient Temperature
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE AND ENGINEERING
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This paper discusses a new family of telechelic ferroelectric polymorphs fluoroterpolymers having OH and COOH terminal groups. The polymer backbone comprises of vinylidene difluoride VDF, trifluoroethylene TrFE, and a small amount of chlorinecontaining third monomers. The slightly bulky chlorine atoms serve as the kinks, which alters the chain conformation from all-trans Beta-phase to tttgtttg- gamma -phase, without reducing crystallinity. Consequently, the terpolymers exhibit low Curie temperature, high dielectric constant 80 and large electrostrictive response 5 at ambient temperature. On the other hand, the reactive terminal groups provide the terpolymers chemical reactivity to form super-structures that may further enhance their electric performance.
- Industrial Chemistry and Chemical Processing
- Polymer Chemistry
- Non-electrical Energy Conversion