Abstract
Films of polyethylene, polytetrafluoroethylene and poly(vinylidene fluoride) were polarized to form electrets under a high static field at a high temperature. Electret films were cooled to near liquid nitrogen temperature and the depolarization current was measured as temperature increased. Several peaks of depolarization current were observed, which indicated the temperatures at which the change of thermal molecular motion or the phase transition in polymer structure took place. A peak was also observed near the temperature at which the electret was formed. The results show that the measurement of depolarization current in electret polymers could become a new method for thermal analysis of polymer properties.
Similar content being viewed by others
Article PDF
References
H. H. Wieder and S. Kaufman, J. Appl. Phys., 24, 156 (1953).
B. Gross, Charge Storage in Solid Dielectrics, Elsevier publishing Co., Amsterdam (1963).
B. Gross, J. Chem. Phys., 17, 866 (1949).
L. Mandelkern, G. M. Martin, and F. A. Quinn.Jr, J. Res. Nat. Bur. Stand., 58, 137 (1957).
M. Date and E. Fukada, Rep. Prog. Polym. Phys. Jpn., 7, 183 (1964).
H. Sasabe and S. Saito, Rep. Prog. Polym. Phys. Jpn., 11, 379 (1968).
M. Asahina, H. Kakutani, and K. Wada, Reprint of 16th Meeting for Discussion of Polymer Science (1967) p. 336.
Y. Wada, J. Phys. Soc. Jpn., 16, 1226 (1960).
S. G. Turley and H. Keskkula, J. Polym. Sci., Part C, 14, 69 (1966).
T. Furukawa, Y. Uematsu, K. Asakawa, and Y. Wada, J. Appl. Polym. Sci., 12, 2675 (1968).
Y. Ohzawa and Y. Wada, J. Appl. Phys. Jpn., 3, 436 (1964).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Takamatsu, T., Fukada, E. Thermal Change of Depolarization Current in Polymer Electrets. Polym J 1, 101–106 (1970). https://doi.org/10.1295/polymj.1.101
Issue Date:
DOI: https://doi.org/10.1295/polymj.1.101
Keywords
This article is cited by
-
Electric current arising from unpolarized polyvinyl formal
Bulletin of Materials Science (2000)
-
Titanium dioxide induced failure in polycarbonate
Journal of Materials Science (1995)
-
Electric field-induced structure in poly(acrylonitrile)
Colloid and Polymer Science (1979)
-
Zur Entstehung des starken piezoelektrischen Effekts in Polyvinylidenfluorid
Colloid and Polymer Science (1978)
-
Low-temperature TSD measurements on γ-irradiated polyvinylidene fluoride
Journal of Materials Science (1977)