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Dielectric relaxations in poly(monocyclohexyl itaconate)
Author(s) -
DíazCalleja Ricardo,
Gargallo Ligia,
Radić Deodato
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070460304
Subject(s) - dielectric , polarizability , relaxation (psychology) , permittivity , materials science , conductivity , cole–cole equation , dielectric permittivity , dielectric loss , electrical resistivity and conductivity , condensed matter physics , nuclear magnetic resonance , chemistry , physics , molecule , optoelectronics , organic chemistry , quantum mechanics , psychology , social psychology
A study of the dielectric relaxation spectrum of poly(monocyclohexyl itaconate) (PMCHI) is performed by means of two experimental techniques: first, at variable frequency in the audio zone and, second, by thermally stimulated depolarization currents. Because of the high conductivity of the samples, there is a hidden dielectric relaxation that can be detected by using the macroscopic dynamic polarizability ε * defined in terms of the dielectric complex permittivity α * by means of the equation (ε * = 1)/(ε * + 2). The transformation performed through this equation is discussed in order to obtain the dielectric relaxations in the zone of high temperatures and low frequencies of the spectrum.