Process for production of styrene-based polymer moldings

Details Process for production of styrene-based polymer moldings Process for production of styrene-based polymer moldings

1993-09-02

1996-03-05

Teskin, Fred

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

Synthetic resins

Treating polymer containing material or treating a solid...

528503, 5263472, 264345, 264346, C08F 600, C08F 1208

Patent

active

054969190

ABSTRACT:
A process of producing a styrene polymer molding which comprises heat treating a molding of a crystalline styrene polymer having mainly a syndiotactic configuration and having a crystallinity of at least 10% as determined by X-ray diffraction analysis. The heat treating is carried out at a temperature of 150.degree.to 250.degree. C. for 20 seconds to 90 minutes.

REFERENCES:
patent: 3009206 (1961-11-01), Salyer et al.
patent: 4680353 (1987-07-01), Ishihara et al.
patent: 4824629 (1989-04-01), Seitz et al.
Neilsen, Mechanical Properties of Polymers . . ., Marcel Dekker, Inc. N.Y., N.Y. (1974) pp. 54-55.
Ishihara et al, Macromolecules, 1986, 19, 2464-2465.

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