Development of molecular orientation in sequentially drawn PET films
โ 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.
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