Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 1999-04-01

Journal: JOURNAL OF APPLIED POLYMER SCIENCE

Included Journals: SCIE、Scopus

Volume: 71

Issue: 14

Page Number: 2385-2390

ISSN: 0021-8995

Key Words: poly(phthalazinone ether sulfone ketone)s; gas separation; permeability; selectivity; composite membrane

Abstract: A series of poly(phthalazinone ether sulfone ketone) (PPESK) copolymers containing different component ratios of bis(4-fluorodiphenyl) ketone and bis(4-chlorodiphenyl)sulfone with respect to a certain amount of 4-(4-hydroxyphenyl)-2,3-phthalazin-1-one were synthesized by polycondensation. Glass transition temperatures of these polymers were adjusted from 263 degrees C to 305 degrees C by changing the ratios of reactants. Gas permeability and selectivity of the dense membranes of the polymers for three kinds of gases (CO2, O-2, and N-2) were determined at different temperatures. The result indicated that the membrane of PPESK (S/K = 1/1, mol ratio) had an excellent gas separation property. Permeability of the polymer membranes for CO2, O-2, and N-2 was P-CO2 = 4.121 barrier, P-O2 = 0.674 barrier, and P-N2 = 0.0891 barrier, respectively. Separation factors of alpha(O2/N) and alpha(CO2/N2) were 7.6 and 46, respectively. New material was made into a composite membrane with silicone rubber for blocking up leaks and defects on the surface of its nonsymmetrical membrane, As a result of the test, permeability of the composite membrane was J(O2) = 7.2 x 10(-6) cm(3) (STP) cm(-2) S-1 cm(-1) Hg and J(N2) = 0.99 x 10(-6) cm(3) (STP) cm(-2) S-1 cm(-1) Hg, whereas the alpha(O2/N2) was Still higher than 7. These showed that PPESKs had a bright prospect as the potential membrane material for high-temperature gas separation. (C) 1999 John Wiley & Sons, Inc.