Synthèse
Volume 29, Numéro 2, Pages 36-45
2024-12-26
Mechanical And Dielectric Relaxationsi N Poly(vinylidenefluoride) Pvdffilms
Authors : Khemis Sofiane . Gasmi Ali . Debili Souha . Jomni Fathi .
Abstract
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°C, 84°C and -42°C, 13°C respectively, at a frequency of 1 Hz in unstretched PVDF film. The main objective of this study was to compare the β and α 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.
Keywords
polymer ; DSC ; Relaxation ; PVDF ; XRD
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