Process for preparing an oriented crystalline syndiotactic vinyl

Details Process for preparing an oriented crystalline syndiotactic vinyl Process for preparing an oriented crystalline syndiotactic vinyl

1988-02-04

1989-04-25

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Stretching or stretch forming

26433117, B29C 5502

Patent

active

048246298

ABSTRACT:
Oriented, syndiotactic, optically transparent vinylaromatic polymers are prepared by a process comprising heating the polymer to a temperature above its crystalline melting point, cooling the polymer to a temperature less than an orientable temperature at a rate sufficient to avoid substantial crystal formation, and inducing strain into the polymer while at a orientable temperature to induce crystal formation and molecular orientation.

REFERENCES:
patent: 3069406 (1962-12-01), Newman et al.
patent: 4692295 (1987-09-01), Vinatier

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