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Dielectric relaxation behaviour of poly(cyclobutyl methacrylate)s
Author(s) -
DíazCalleja Ricardo,
GarcíaBernabé Abel,
SánchezMartínez Enrique,
Hormazábal Andrea,
Gargallo Ligia,
Radić Deodato
Publication year - 2002
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1084
Subject(s) - dielectric , relaxation (psychology) , methacrylate , polymer chemistry , materials science , methyl methacrylate , dielectric loss , side chain , permittivity , electrical conductor , thermodynamics , polymer , composite material , polymer science , polymerization , physics , psychology , social psychology , optoelectronics
Dielectric behaviour of two poly(methacrylate)s with cyclobutyl groups in the side‐chains has been studied. This investigation was performed by determining the dielectric permittivity and loss in terms of frequency and temperature for poly(cyclobutyl methacrylate) (PCBuM) and poly(cyclobutylmethyl methacrylate) (PCBuMM). Dynamic dielectric measurements show sub‐glass relaxations, probably due to motions in the lateral chain, including the cyclobutyl ring. The effect of the insertion of a flexible spacer group into the side‐chain is also analyzed. The α relaxations were analyzed in terms of the Havriliak–Negami equation and the free volume theory tested according to the Vogel–Fulcher–Tamman–Hesse equation. The conductive and interfacial phenomena were studied by hopping and MacDonald–Coelho models. © 2002 Society of Chemical Industry