@article { ISI:000261582300006,
	title = {Molecular dynamics of copolyester/clay nanocomposites as investigated by viscoelastic and dielectric analysis},
	journal = {Journal of Polymer Science Part B-Polymer Physics},
	volume = {46},
	number = {23},
	year = {2008},
	month = {DEC},
	pages = {2539-2555},
	publisher = {JOHN WILEY \& SONS INC},
	type = {Article},
	address = {111 RIVER ST, HOBOKEN, NJ 07030 USA},
	abstract = {<p>We have investigated the molecular dynamics of poly(ethylene glycol-co-cycloxeane-1,4-dimethanol terephthalate) (PETG) nanocomposites based on a organically modified layered silicate. Intercalated namocomposites were prepared by melt compounding technique as evidenced from the X-ray diffraction and transmission electron microscopy studies. Two relaxation processes were observed in pure PETG as well as in the nanocomposites. The low-temperature beta-process was assigned to the local motions of C=O polar groups and the alpha-process was due to the glass-rubber transition or the segmental relaxations associated with the polymer chain backbone. Presence of layered silicates accelerated alpha-relaxation dynamics in the nanocomposites accompanied by a depression in T(g) which was attributed to the reduced intermolecular cooperativity between intercalated polymers chains. Additionally, a direct comparison between the viscoelastic and dielectric studies shows excellent agreement between the accelerated alpha dynamics of the nanocomposites. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 2539-2555, 2008</p>},
	keywords = {clay, Dielectric relaxation, Nanocomposites, polyesters},
	issn = {0887-6266},
	doi = {10.1002/polb.21603},
	author = {Kalgaonkar, Rajendra A. and Jog, Jyoti Prakash}
}
