Dielectric relaxation behaviour of poly(cyclohexylmethyl methacrylate) and poly(benzyl methacrylate)

Amparo Ribes-Greus; Ricardo Díaz-Calleja; Ligia Gargallo; Deodato Radić

doi:10.1016/0032-3861(89)90331-5

Dielectric relaxation behaviour of poly(cyclohexylmethyl methacrylate) and poly(benzyl methacrylate)

Amparo Ribes-Greus
, Ricardo Díaz-Calleja
, Ligia Gargallo
, Deodato Radić

Polytechnic University of Valencia
Pontificia Universidad Católica de Chile

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

The relaxation processes in poly(cyclohexylmethyl methacrylate) (PCMMA) and poly(benzyl methacrylate) (PBzMA) have been studied by dynamic dielectric techniques. The study includes the α-, γ- and δ-relaxations in the first polymer and the α-relaxation in the second one. The α-relaxation has been fitted to the empirical model of Havriliak and Negami, and the functional relation between the mean relaxation times and the temperature has been adjusted to the equation of Vogel. In the case of PCMMA two new relaxations labelled δ and γ in order of increasing temperature have been observed. The apparent activation energy of these relaxations are 5.5 and 11.8 kcal mol^-1 respectively. The dielectric relaxation behaviours of PCMMA and PBzMA are discussed in relation to that of poly(cyclohexyl methacrylate) previously studied.

Original language	English
Pages (from-to)	1685-1689
Number of pages	5
Journal	Polymer
Volume	30
Issue number	9
DOIs	https://doi.org/10.1016/0032-3861(89)90331-5
State	Published - Sep 1989
Externally published	Yes

Keywords

Cole-Cole arcs
apparent activation energy
dielectric relaxations
isochrone difference
loss permittivity
poly(cyclohexylmethyl methacrylate)

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10.1016/0032-3861(89)90331-5

Cite this

@article{86aa04f9e6654dc2afe27f4f10e9dca0,

title = "Dielectric relaxation behaviour of poly(cyclohexylmethyl methacrylate) and poly(benzyl methacrylate)",

abstract = "The relaxation processes in poly(cyclohexylmethyl methacrylate) (PCMMA) and poly(benzyl methacrylate) (PBzMA) have been studied by dynamic dielectric techniques. The study includes the α-, γ- and δ-relaxations in the first polymer and the α-relaxation in the second one. The α-relaxation has been fitted to the empirical model of Havriliak and Negami, and the functional relation between the mean relaxation times and the temperature has been adjusted to the equation of Vogel. In the case of PCMMA two new relaxations labelled δ and γ in order of increasing temperature have been observed. The apparent activation energy of these relaxations are 5.5 and 11.8 kcal mol-1 respectively. The dielectric relaxation behaviours of PCMMA and PBzMA are discussed in relation to that of poly(cyclohexyl methacrylate) previously studied.",

keywords = "Cole-Cole arcs, apparent activation energy, dielectric relaxations, isochrone difference, loss permittivity, poly(cyclohexylmethyl methacrylate)",

author = "Amparo Ribes-Greus and Ricardo D{\'i}az-Calleja and Ligia Gargallo and Deodato Radi{\'c}",

year = "1989",

month = sep,

doi = "10.1016/0032-3861(89)90331-5",

language = "English",

volume = "30",

pages = "1685--1689",

journal = "Polymer",

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number = "9",

}

TY - JOUR

T1 - Dielectric relaxation behaviour of poly(cyclohexylmethyl methacrylate) and poly(benzyl methacrylate)

AU - Ribes-Greus, Amparo

AU - Díaz-Calleja, Ricardo

AU - Gargallo, Ligia

AU - Radić, Deodato

PY - 1989/9

Y1 - 1989/9

N2 - The relaxation processes in poly(cyclohexylmethyl methacrylate) (PCMMA) and poly(benzyl methacrylate) (PBzMA) have been studied by dynamic dielectric techniques. The study includes the α-, γ- and δ-relaxations in the first polymer and the α-relaxation in the second one. The α-relaxation has been fitted to the empirical model of Havriliak and Negami, and the functional relation between the mean relaxation times and the temperature has been adjusted to the equation of Vogel. In the case of PCMMA two new relaxations labelled δ and γ in order of increasing temperature have been observed. The apparent activation energy of these relaxations are 5.5 and 11.8 kcal mol-1 respectively. The dielectric relaxation behaviours of PCMMA and PBzMA are discussed in relation to that of poly(cyclohexyl methacrylate) previously studied.

AB - The relaxation processes in poly(cyclohexylmethyl methacrylate) (PCMMA) and poly(benzyl methacrylate) (PBzMA) have been studied by dynamic dielectric techniques. The study includes the α-, γ- and δ-relaxations in the first polymer and the α-relaxation in the second one. The α-relaxation has been fitted to the empirical model of Havriliak and Negami, and the functional relation between the mean relaxation times and the temperature has been adjusted to the equation of Vogel. In the case of PCMMA two new relaxations labelled δ and γ in order of increasing temperature have been observed. The apparent activation energy of these relaxations are 5.5 and 11.8 kcal mol-1 respectively. The dielectric relaxation behaviours of PCMMA and PBzMA are discussed in relation to that of poly(cyclohexyl methacrylate) previously studied.

KW - Cole-Cole arcs

KW - apparent activation energy

KW - dielectric relaxations

KW - isochrone difference

KW - loss permittivity

KW - poly(cyclohexylmethyl methacrylate)

UR - https://www.scopus.com/pages/publications/0024732562

U2 - 10.1016/0032-3861(89)90331-5

DO - 10.1016/0032-3861(89)90331-5

M3 - Article

AN - SCOPUS:0024732562

SN - 0032-3861

VL - 30

SP - 1685

EP - 1689

JO - Polymer

JF - Polymer

IS - 9

ER -

Dielectric relaxation behaviour of poly(cyclohexylmethyl methacrylate) and poly(benzyl methacrylate)

Abstract

Keywords

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