Electret state of butadiene-styrene copolymers

Author

Capelletti, R. ; Pospisil, J.

Author_Institution

Dept. of Phys., Parma Univ., Italy

fYear

1988

fDate

1-3 Sep 1988

Firstpage

510

Lastpage

514

Abstract

Thermally stimulated depolarization currents (TSDC) in the range of 120-350 K are exploited to study triblock and statistical styrene-butadiene copolymers. TSDC peaks occur at the butadiene phase glass transition, due to the reorientation of butadiene dipolar groups. The peak is accounted for by a distribution of relaxation times. In block copolymers the TSDC signal is monitored at the butadiene phase transition temperature even if the sample is not previously polarized. Ordering effects induced by the sample preparation are discussed

Keywords

dielectric depolarisation; electrets; glass transition (polymers); molecular reorientation; polymer blends; thermally stimulated currents; 120 to 350 K; TSDC peaks; butadiene phase glass transition; butadiene-styrene copolymers; dipolar group reorientation; electret state; ordering effects; relaxation times distribution; sample preparation; statistical copolymers; thermally stimulated depolarisation currents; triblock copolymers; Computational Intelligence Society; Electrets; Electric variables measurement; Glass; Microstructure; Monitoring; Performance evaluation; Physics; Polarization; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)

Conference_Location

Oxford

Type

conf

DOI

10.1109/ISE.1988.38613

Filename

38613