Title :
Molecular mobility in poly(ethylene naphthalene 2,6 dicarboxylate)(PEN) dielectric films
Author :
Hakme, C. ; Stevenson, I. ; David, L. ; Sixou, B. ; Voice, A. ; Seytre, G. ; Boiteux, G.
Author_Institution :
Lab. des Materiaux Polymeres et des Biomateriaux, CNRS, Villeurbanne, France
Abstract :
The morphology of amorphous and uniaxially stretched PEN films have been characterized by DSC, WAXS and IR. Molecular mobility have been also studied by dynamic mechanical (DMS) and dielectric (DRS) spectroscopies: the α-relaxation is affected by orientation and crystallisation and is shifted to higher temperature, the β*-relaxation is dependent on the orientation state and shows an increase of mobility after stretching whereas the last β-relaxation shows no variation with drawing ratio or temperature of stretching. The influence of conduction mechanism upon orientation and crystallinity with temperature was studied by DC measurements in order to enable us to follow the mobility in situ during crystallization.
Keywords :
X-ray diffraction; crystallisation; dielectric relaxation; dielectric thin films; differential scanning calorimetry; electrical conductivity; infrared spectra; polymer films; α-relaxation; β*-relaxation; β-relaxation; DSC; IR; WAXS; amorphous PEN films morphology; conduction mechanism; crystallisation; dc measurements; dielectric spectroscopy; drawing ratio; dynamic mechanical spectroscopy; molecular mobility; orientation; poly(ethylene naphthalene 2,6 dicarboxylate); stretching temperature; uniaxially stretched PEN films; Amorphous materials; Astronomy; Crystallization; Dielectric films; Electrochemical impedance spectroscopy; Glass; Morphology; Physics; Polymer films; Temperature dependence;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350283
