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Development of molecular orientation in sequentially drawn PET films

โœ Scribed by J.B.Faisant de Champchesnel; D.I. Bower; I.M. Ward; J.F. Tassin; G. Lorentz


Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
780 KB
Volume
34
Category
Article
ISSN
0032-3861

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## Abstract The polarized infrared (IR) spectroscopy technique was used to evaluate the surface uniaxial molecular orientation of films of poly(ethylene terephthalate) (PET), two thermotropic liquid crystalline polymers (LCPs), VectraยฎA950 and RodrunยฎLC5000, and their blends obtained by extrusion.

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Mechanical and structural parameters related to the optical properties of polyester (PET) (woollen type) ยฎbres drawn at room temperature have been investigated. The changes in the strain were evaluated to obtain the molecular orientation factors hP 2 (cos u)i and hP 4 (cos u)i. From the optical orie