Ultradrawing of amorphous polymers by coextrusion illustrated with atactic polystyrene
- 15 November 1979
- journal article
- research article
- Published by Wiley in Journal of Applied Polymer Science
- Vol. 24 (10) , 2137-2146
- https://doi.org/10.1002/app.1979.070241006
Abstract
Films of pure and high‐impact atactic polystyrene were prepared by the recently developed technique of solid‐state coextrusion. The films were produced at extrusion rates ≥4 cm/min at 126°C with a maximum extrusion draw ratio (EDR) of 11.6. These ultradrawn films are fibrous, have a high birefringence of −2.24 × 10−2, and exhibit a 72% elastic recovery. The material has a tensile modulus of ∼4–5 GPa and a tensile strength to break of 85 MPa. Thermal analysis suggests a constant Tg.Keywords
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