Open AccessPHENOMENOLOGICAL THEORY OF SLOW POLARIZATION IN POLYMERS
Author(s) -
Jingde Li,
Wanqiang Cao,
Yong Wang
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.986
Subject(s) - dielectric , materials science , electret , polarization (electrochemistry) , phase transition , polymer , condensed matter physics , ferroics , phenomenological model , quantum phase transition , physics , chemistry , quantum critical point , optoelectronics , composite material
The phenomenological theory using in phase transition of crystalline state is generalized to polymers. The dielectric behaviors and space charge electret effects of polymers in the process of its structural transitions are explained by the theory. The phase transition of a crystal is the transition of its structure of first-order, it is related to the anomalous of dielectric constant εh of fast polarization. But the structural transitions of a polymer is only the transition of its structure of second-order and third-order; in this process, the anomalous of εh absents and the reciprocal of dielectric constant εl of slow polarization softens as parabolic type. The theory is in good agreement with experimental results of polypropylene.