Process for the preparation of fibers of stereoregular polystyrene
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United States of America Patent
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Apr 9, 1991
Grant Date -
N/A
app pub date -
Sep 1, 1988
filing date -
Sep 1, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the preparation of fibers of syndiotatic polystyrene, or a mixture of isotactic polystyrene and syndiotactic polystyrene which comprises: A. heating syndiotactic polystyrene, or a mixture of syndiotactic polystyrene and isotactic polystyrene, to a temperature between its crystal melting point and the temperature at which the polystyrene undergoes degradation, wherein the polystyrene has sufficient viscosity to be extruded: B. extruding the polystyrene through an orifice to form a fiber at elevated temperature; C. quenching the fiber by passing the fiber through one or more zones under conditions such that the fiber solidifies; and D. cooling the fiber to ambient temperature.
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