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Correlation of piezoelectric effect and TSC in stretched polystyrene-acrylonitrile films

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2 Author(s)
Hundal, J.S. ; Dept. of Phys., Roorkee Univ., India ; Nath, R.

The piezoelectric coefficient d31 of stretched SAN (polystyrene-co-acrylonitrile) films has been measured under different poling and stretching conditions. The maximum average value of d31 has been found to be 3.85 pC/N for 2.5× stretched films, corona poled at field EP≃50 MV/m, and poling temperature TP=85°C. The TSC (thermally stimulated current) experiments were performed to obtain the contribution of the polarization to the piezoelectric activity. The shrinkage effect and the TSC results are correlated to elucidate the molecular relaxation processes. The elastic modulus, crystallinity and polarization parameters are correlated to the piezoelectricity. The contributions of the dimensional and the local field effects to the piezoelectric activity in SAN are discussed

Published in:

Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:4 ,  Issue: 6 )

Date of Publication:

Dec 1997

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