Solvent treatment of syndiotactic styrene-based polymer moldings

Details Solvent treatment of syndiotactic styrene-based polymer moldings Solvent treatment of syndiotactic styrene-based polymer moldings

1989-08-07

1992-12-15

Teskin, Fred

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

Synthetic resins

Treating polymer containing material or treating a solid...

528491, 528497, 528498, 264233, 264341, C08J 702

Patent

active

051718340

ABSTRACT:
Styrene-based polymer moldings and a process for efficient production thereof are disclosed. The styrene-based polymer moldings are obtained by subjecting moldings of styrene-based polymers with mainly syndiotactic configuration and a weight average molecular weight of at least 100,000 to solvent treatment, such as, by dipping in a solvent or exposing to a solvent vapor. The styrene-based moldings are excellent in gas permeability and heat resistance, and thus are useful as gas permeable membranes, vegetable wrapping films or moldings required to have good heat resistance.

REFERENCES:
patent: 2142968 (1939-01-01), Stoesser
patent: 3476841 (1969-11-01), Bienert
Williams et al., "Crystallizable Polystyrene . . . ", JACS, 79, 1716 (1957).
Rebenfeld et al., "Interactions Between Solvents and Polymers in the Solid State", J. Macromol. Sci.-Rev. Macromol. Chem., C15(2), 279-393 (1976).

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