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 -