Title :
Polarization reversal of aliphatic polyurethane above the glass transition temperature
Author :
Yuki, Toshinao ; Shida, Kazuhisa ; Koda, Tomonori ; Ikeda, Susumu
Author_Institution :
Dept. of Mater. Sci. & Eng., Yamagata Univ., Yonezawa, Japan
Abstract :
In this report, the J(current)-E(electric field) hysteresis of hydrogen bonded polymers is discussed. The selected hydrogen bonded polymers are polyurethane copolymers. These copolymers are slightly crystalline. The remanent polarization is observed above the glass transition temperature through the transformation of a J-E hysteresis curve to a D(electric displacement)-E hysteresis one. The observation suggests a possibility of liquid ferroelectrics far from amorphous ferroelectrics
Keywords :
dielectric hysteresis; dielectric liquids; dielectric polarisation; ferroelectric materials; ferroelectric switching; glass transition; hydrogen bonds; polymer blends; polymer structure; J-E hysteresis curve; aliphatic polyurethane; copolymers; current-electric field hysteresis; glass transition temperature; hydrogen bonded polymers; liquid ferroelectrics; polarization reversal; remanent polarization; Amorphous materials; Bonding; Crystallization; Ferroelectric materials; Glass; Hydrogen; Hysteresis; Polarization; Polymers; Temperature;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.832136
