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Isothermal phase diagrams and phase‐inversion behavior of poly(vinylidene fluoride)/solvents/additives/water systems
Author(s) -
Yeow M. L.,
Liu Y. T.,
Li K.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12846
Subject(s) - fluoride , isothermal process , ternary numeral system , ternary operation , dimethylacetamide , polyvinylpyrrolidone , phase inversion , phase diagram , formamide , polymer chemistry , dissolution , materials science , chemistry , chemical engineering , phase (matter) , nuclear chemistry , solvent , inorganic chemistry , organic chemistry , thermodynamics , membrane , biochemistry , physics , computer science , engineering , programming language
Isothermal ternary phase diagrams of poly(vinylidene fluoride) (PVDF)/solvents/nonsolvent systems were produced using four different solvents, N,N ‐dimethylacetamide (DMAc), 1‐methyl‐2‐pyrrolidinone (NMP), N,N ‐dimethylformamide (DMF), and triethyl phosphate (TEP), and using water as a nonsolvent. The effects of the additives polyvinylpyrrolidone (PVP, M w = 10,000), ethanol, and lithium perchlorate (LiClO 4 ) on the phase‐inversion behavior of PVDF/DMAc/water ternary system were investigated, with additive concentrations of 2 and 6 wt %, at temperatures of 25 and 70°C, respectively. Ethanol, glycerol, and water were used to study the cloud points of 10, 15, and 20 wt % PVDF/DMAc concentrations, at solution temperatures ranging from 30 to 70°C. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2150–2155, 2003
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