Miscibility of polysulfone blends with poly(1-vinylpyrrolidone-co-styrene) copolymers and their interaction energies
- Authors
- Kim, Joo Heon; Kim, Yong; Kim, Chang Keun; Lee, Jae Wook; Seo, S.B.
- Issue Date
- Jun-2003
- Publisher
- JOHN WILEY & SONS INC
- Keywords
- polysulfone; poly(1-vinylpyrrolidone-co-styrene); hydrophilicity; miscibility; blends; lower critical solution temperature; interaction energy; phase behavior
- Citation
- JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v.41, no.12, pp 1401 - 1411
- Pages
- 11
- Journal Title
- JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
- Volume
- 41
- Number
- 12
- Start Page
- 1401
- End Page
- 1411
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/24980
- DOI
- 10.1002/polb.10485
- ISSN
- 0887-6266
1099-0488
- Abstract
- The miscibility of polysulfone (PSf) with various hydrophilic copolymers was explored. Among these blends, PSf gave homogeneous mixtures with poly(1-vinylpyrrolidone-co-styrene) [P(VP-S)] copolymers when these copolymers contained 68-88 wt % 1-vinylpyrrolidone (VP). Miscible PSf blends with P(VP-S) copolymers underwent phase separation on heating caused by lower critical solution temperature (LCST)-type phase behavior. The phase behavior depended on the copolymer composition. Changes in the VP content of P(V-P-S) copolymers from 65 to 68 wt % shifted the phase behavior from immiscibility to miscibility and the LCST behavior. The phase-separation temperatures of the miscible blends first increased gradually with the VIP content, then went through a broad maximum centered at about 80 wt % V-P, and finally decreased just before the limiting content of VP for miscibility with PSf. The interaction energies of binary pairs involved in PSf/P(VP-S) blends were evaluated from the phase-separation temperatures of PSf/P(VP-S) blends with lattice-fluid theory combined with a binary interaction model. The decrease in the contact angle between water and the membrane surface with increasing VP content in P(VP-S) copolymers indicated that the hydrophobic properties of PSf could be improved via blending with hydrophilic P(VP-S) copolymers. (C) 2003 Wiley Periodicals, Inc.
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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