Method for preparing semipermeable membrane compositions

Details Method for preparing semipermeable membrane compositions Method for preparing semipermeable membrane compositions

1987-06-12

1988-08-16

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

55 16, 55158, 2105004, 21050041, 264 22, 2642096, 264211, 2642358, 2642888, 2642902, 264343, 264346, 521 61, 521189, B29C 5512, C08J 936

Patent

active

047643200

ABSTRACT:
Semipermeable membranes with improved permeation flux are prepared by contacting a glassy polymer in the form of a hollow fiber or film with a solvent in which the polymer swells at conditions which permit the swelling solvent to diffuse into the glassy polymer and then stretching the swollen polymer in an amount sufficient to cause visible stress whitening.

REFERENCES:
patent: 3534528 (1970-10-01), Porter
patent: 3839516 (1971-06-01), Williams et al.
patent: 3884801 (1973-09-01), Kesting
patent: 4130403 (1978-12-01), Cooley et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4430807 (1984-02-01), Davis et al.
patent: 4561654 (1985-12-01), Haza et al.
Kirk-Othmer Encyclopedia of Chemical Technology, Third Edition, vol. 15 "Membrane Technology", pp. 108-112.
Encyclopedia of Polymer Science and Technology, vol. 6, p. 764.

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