Response of acrylate polymers containing substituted 1,3-dioxacyclohexane groups in the ester residue to mechanical and electric perturbation fields

Citation
V. Compan et al., Response of acrylate polymers containing substituted 1,3-dioxacyclohexane groups in the ester residue to mechanical and electric perturbation fields, POLYMER, 42(9), 2001, pp. 4339-4346
Citations number
31
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER
ISSN journal
00323861 → ACNP
Volume
42
Issue
9
Year of publication
2001
Pages
4339 - 4346
Database
ISI
SICI code
0032-3861(200104)42:9<4339:ROAPCS>2.0.ZU;2-P
Abstract
The responses of poly(2-phenyl-5-aeryloxymethyl-5-ethyl-1,3-dioxacyclohexan e) (PDAEP) to alternating mechanical and electric fields are studied. Molec ular dynamics simulations, together with the comparative analysis of the di electric spectra of PDAEP and poly(5-acryloxymethyl-5-ethyl-1,3-dioxacycloh exane) lead to conclude that Ripping motions of the 1.3-dioxacyclohexane ri ng may not be exclusively responsible, as it is often assumed, for the prom inent beta relaxations present in the spectra of polymers containing dioxan e and cyclohexane pendant groups in their structure. The dipole-correlation coefficient of PDAEP obtained from the dielectric spectra is ca. 0.62, a v alue similar to that reported for the dipole auto-correlation coefficient o f most acrylate chains. This fact suggests that intramolecular dipolar-corr elations play a dominant role in the dielectric relaxation of PDAEP. (C) 20 01 Elsevier Science Ltd. All rights reserved.