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Compatibility studies of sulfonated poly(ether ether ketone)–poly(ether imide)–polycarbonate ternary blends
Author(s) -
Chun Yong Sung,
Kwon Hyun Sung,
Kim Woo Nyon,
Yoon Ho Gyu
Publication year - 2000
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 - 10.1002/1097-4628(20001227)78:14<2488::aid-app80>3.0.co;2-t
Subject(s) - miscibility , materials science , ether , polymer blend , polymer chemistry , polycarbonate , differential scanning calorimetry , ternary operation , glass transition , imide , polymer , chemical engineering , composite material , copolymer , organic chemistry , chemistry , thermodynamics , computer science , programming language , physics , engineering
Binary blends of the sulfonated poly(ether ether ketone) (SPEEK)–poly(ether imide) (PEI) and SPEEK–polycarbonate (PC), and ternary blends of the SPEEK–PEI–PC, were investigated by differential scanning calorimetry. SPEEK was obtained by sulfonation of poly(ether ether ketone) using 95% sulfuric acid. From the thermal analysis of the SPEEK–PEI blends, single glass transition temperature ( T g ) was observed at all the blend composition. For the SPEEK–PC blends, double T g s were observed. From the results of thermal analysis, it is suggested that the SPEEK–PEI blends are miscible and the SPEEK–PC blends are immiscible. Polymer–polymer interaction parameter (χ 12 ) of the SPEEK–PEI blends was calculated from the modified Lu and Weiss equation, and found to range from −0.011 to −0.825 with the blend composition. For the SPEEK–PC blends, the χ 12 values were calculated from the modified Flory–Huggins equation, and found to range from 0.191 to 0.272 with the blend composition. For the SPEEK–PEI–PC ternary blends, phase separation regions that showed two T g s were found to be consistent with the spinodal curves calculated from the χ 12 values of the three binary blends. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2488–2494, 2000