DIELECTRIC RELAXATIONS IN POLY(MONOCYCLOHEXYL ITACONATE)
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Date
1992
Authors
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Publisher
JOHN WILEY & SONS INC
Abstract
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 alpha* defined in terms of the dielectric complex permittivity epsilon* by means of the equation-alpha* = (epsilon* - 1)/(epsilon* + 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.
Description
Keywords
DYNAMIC MECHANICAL SPECTRA, POLY(ITACONIC ACID-ESTERS), POLY(ALKYL ITACONATES), GLASS TRANSITIONS, CYCLOHEXYL RINGS, ESTER SERIES, METHACRYLATE), BEHAVIOR, PHENYL