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
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
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