Oriented optically transparent crystalline syndiotatic vinylarom

Details Oriented optically transparent crystalline syndiotatic vinylarom Oriented optically transparent crystalline syndiotatic vinylarom

1989-04-24

1990-09-25

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526347, 5263471, 5263481, C08F 1208, C08F 1206

Patent

active

049594354

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), Neuman et al.
patent: 3639332 (1972-02-01), Coover et al.
patent: 4680353 (1987-07-01), Ishihara
patent: 4692295 (1987-09-01), Vinatier

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