EFFECT OF HEXANE TREATMENT AND UNIAXIAL STRETCHING ON BENDING ELECTRICITY OF POLYVINYLIDENE FLUORIDE (PVDF)

Abstract

The  effect  of  hexane  treatment  and  uniaxial stretching  in  polyvinylidene fluoride (PVDF) film was studied. The quantity,  β31, defined as the bending piezoelectric stress constant, was  calculated. After hexane treatment and uniaxial stretching of the PVDF film, the value of β31 was 5.75 mV/m and 8.00 mV/m for draw ratio of 1.5  and  2.5  was  recorded.  Fourier  transform  Infra-red  (FTIR)  spectrophotometry was used for structural investigations.