Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ
Patent
1995-02-01
1996-04-16
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
264 83, 264184, 264203, 2642091, 26421116, 26421119, 264216, 264344, B29C 6720, D01D 5247
Patent
active
055079849
ABSTRACT:
A process is disclosed for preparing a poly(phenylene sulfide) (PPS) separation membrane in which a PPS is treated with oxygen to increase its bulk viscosity to at least about 20,000 poise. The treated PPS is then dissolved in a solvent and cast or extruded, followed by a precipitation step.
REFERENCES:
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patent: 5246647 (1993-09-01), Beck et al.
Ma et al., "Rheological and Morphological Properties of Thermal-Aged Poly(phenylene Sulfide) Resin", J. App. Pol. Sci., vol. 39, pp. 1399-1415 (1990).
Smith, "Poly(arylene Sulfides)" Encyclopedia of Polymer Science and Technology, vol. 10, 1969, pp. 653-659.
Hawkins, "Chemistry of the Cure of Poly(p-phenylene sulfide", Macromolecules, vol. 9, No. 2, Mar.-Apr., 1976, pp. 189-194.
Encyclopedia of Polymer Science and Engineering, vol. 16, (1989), pp. 288-290, 359.
Scobbo, "Effect of Solid-State Curing on the Viscoelastic Properties of Poly(phenylene sulfide)" J. of App. Pol. Sci., vol. 47, pp. 2169-2175 (1993).
Meier et al., "Selectivity enhancement via phtooxidative surface modification of polyimide air separation membranes", J. of Membrane Sci., 94 (1994), pp. 195-212.
Tentoni Leo B.
The Dow Chemical Company
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