1<\/sup><\/em>Laboratoire LPS, D\u00e9partement de Physique, Facult\u00e9s des Sciences, <\/em><\/p>\n Universit\u00e9 Badji Mokhtar BP 12,23000 Annaba, Alg\u00e9rie.<\/em><\/p>\n 2<\/sup><\/em>Laboratoire LMOP, D\u00e9partement de Physique, Facult\u00e9 des Sciences,<\/em><\/p>\n \u00a0Universit\u00e9 de Tunis El Manar Tunis, Tunisie.<\/em><\/p>\n <\/p>\n T\u00e9l\u00e9charger l’article ABSTRACT<\/strong><\/p>\n Dielectric and Dynamic Mechanical Spectroscopy, as well as Differential Scanning Calorimetry measurements associated with X-ray diffraction (XRD), were conducted on PVDF films. Several mechanical and dielectric relaxations were observed at approximately -48\u00b0C, 84\u00b0C and -42\u00b0C, 13\u00b0C respectively, at a frequency of 1 Hz in unstretched PVDF film. The main objective of this study was to compare the \u03b2 and \u03b1 mechanical relaxations and enhance the understanding of the structural changes that occur in the crystalline phase during stretching at various temperatures. Reorientation of the chains and an increase in the degree of crystallinity were observed with stretching at different temperatures.<\/p>\n Keywords:<\/em><\/strong><\/p>\n Polymer ,PVDF , Relaxation DSC , <\/em>XRD.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Num\u00e9ro de la revue: Volume 29 , Num\u00e9ro 2 Auteurs: Khemis1, S. Debili1, F. jomni2 and A. Gasmi1 1Laboratoire LPS, D\u00e9partement de Physique, Facult\u00e9s des Sciences, Universit\u00e9 Badji Mokhtar BP 12,23000 Annaba, Alg\u00e9rie. 2Laboratoire LMOP, D\u00e9partement de Physique, Facult\u00e9 des … Lire la suite ![\"p2\"](\"\/wp-content\/uploads\/2014\/04\/p2.jpg\")
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