Study of the Influence of the Speed of Cooling on the α-Relaxation in Polymers by the Thermostimulated Current Method
Thermostimulated current technique (TSC) was used to investigate the influence of the cooling rate on the α-relaxation in the glass transition range of poly(vinyl-acetate) and poly (ethylene) phase in ethyl-vinyl-acetate (EVA) copolymer. High resolution of TSC allowed the detection of the α-relaxation processes in polyethylene phase. The obtained spectra revealed two peaks, always at the same temperatures, but their maximum intensities are decreasing with the cooling rate. An empirical formula describing the maximum intensity evolution is proposed.
Keywords: Cooling rate; TSC (thermostimulated current); α-Relaxation
Document Type: Research Article
Affiliations: Laboratoire de Physique des Matériaux, Université des Sciences et Technologies Houari Boumedienne, Algiers, Algeria
Publication date: 01 July 2006
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