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Morphology and texture development of uniaxially stretched poly(ethylene naphthalene‐2,6‐dicarboxylate)
Author(s) -
Douillard A.,
Hakme C.,
David L.,
Stevenson I.,
Boiteux G.,
Seytre G.,
Kazmierczak T.,
Galeski A.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24758
Subject(s) - crystallinity , materials science , crystallite , crystallization , amorphous solid , texture (cosmology) , morphology (biology) , composite material , pole figure , diffraction , crystallography , polymer chemistry , microstructure , chemical engineering , optics , chemistry , physics , image (mathematics) , artificial intelligence , biology , computer science , engineering , metallurgy , genetics
The texture development of PEN films with different semicrystalline morphologies have been studied by X‐ray diffraction. These different structures have been obtained by uniaxially stretching PEN amorphous films at 100 and 160°C (below and above T g ) at different drawing ratios. Samples have also been characterized by DSC to determine the crystallinity ratios, the crystallization, and melting temperatures. To define the orientation of crystallites in the oriented samples, pole figures have been constructed, as a function of temperature and drawing ratio (DR) in the range 1.5–4. In the range from DR = 2 to 4 the orientation is clearly uniplanar‐axial. At T draw = 100°C the crystallinity shown by DSC analysis is higher than the sample stretched at 160°C. The orientation is also higher when samples are stretched at 100°C. The naphthalene rings mainly stay in the plane of the film with a lower fraction perpendicular to the plane of the film. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 395–401, 2007