Orientation in poly(ethylene terephthalate) drawn by solid state coextrusion |
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| Authors: | Tong Sun C. Richard Desper Roger S. Porter |
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| Affiliation: | (1) Polymer Science and Engineering Department, Materials Research Laboratory, University of Massachusetts, 01003 Amherst, Massachusetts, USA;(2) Present address: East China Institute of Textile Science and Technology, Shanghai, People's Republic of China;(3) Present address: US Army Materials and Mechanics Research Center, Polymer Research Group, Building 39, 02172 Watertown, Massachusetts, USA |
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| Abstract: | ![]()
The development of uniaxial orientation by solid-state extrusion at 60 to 90° C has been evaluated for both the amorphous and crystalline components of a polyethylene terephthalate). Analyses involved X-ray diffraction, birefringence and visable dichroism. The dichroism was evalulated from a host dye molecule. The initial PET film for draw was amorphous and isotropic. Orientation functions for the amorphous and the developed crystalline phases are reported at a series of draw ratios up to 4.4. |
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