The influence of drawing in hot water on the morphological properties of PET films as measured by DSC and modulated DSC. Zumailan, A., Denis, G., Dargent, E., Saiter, J. M., & Grenet, A. Journal of Thermal Analysis and Calorimetry, 68(1):5–13, 2002.
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PET films uniaxially drawn in hot water are studied by means of conventional DSC and modulated DSC (MDSC). Glass transition is studied by MDSC which allows to access the glass transition temperature T-g and the variations of DeltaC(P)=C-Pt -C-Pg (difference between thermal capacity in the liquid-like and glassy states at T=T-g). Variations of T-g with the water content (which act as plasticizer) and with the drawing (which rigidifies the amorphous phase) are discussed with regard to the structure engaged in these materials. The increments of DeltaC(p) at T-g are also interpreted using a three phases model and the 'strong-fragile' glass former liquid concept. We show that the 'fragility' of the medium increases due to the conjugated effects of deformation and water sorption as soon as a strain induced crystalline phase is obtained. Then, 'fragility' decreases drastically with the occurring rigid amorphous phase.
@article{zumailan_influence_2002,
	title = {The influence of drawing in hot water on the morphological properties of {PET} films as measured by {DSC} and modulated {DSC}},
	volume = {68},
	issn = {1418-2874},
	doi = {10.1023/A:1014956114060},
	abstract = {PET films uniaxially drawn in hot water are studied by means of conventional DSC and modulated DSC (MDSC). Glass transition is studied by MDSC which allows to access the glass transition temperature T-g and the variations of DeltaC(P)=C-Pt -C-Pg (difference between thermal capacity in the liquid-like and glassy states at T=T-g). Variations of T-g with the water content (which act as plasticizer) and with the drawing (which rigidifies the amorphous phase) are discussed with regard to the structure engaged in these materials. The increments of DeltaC(p) at T-g are also interpreted using a three phases model and the 'strong-fragile' glass former liquid concept. We show that the 'fragility' of the medium increases due to the conjugated effects of deformation and water sorption as soon as a strain induced crystalline phase is obtained. Then, 'fragility' decreases drastically with the occurring rigid amorphous phase.},
	language = {English},
	number = {1},
	journal = {Journal of Thermal Analysis and Calorimetry},
	author = {Zumailan, A. and Denis, G. and Dargent, E. and Saiter, J. M. and Grenet, A.},
	year = {2002},
	keywords = {DSC, PET, cure, differential scanning calorimetry, mdsc, poly(ethylene-terephthalate) films, thermosetting systems, vitrification, water},
	pages = {5--13}
}

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