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Miscibility in blends of sulfonylated poly(2,6‐dimethyl‐1,4‐phenylene oxide) and poly( p ‐bromostyrene‐ co ‐ o ‐bromostyrene)
Author(s) -
Vuković Radivoje,
Bogdanić Grozdana,
Kurešević Vjera,
Srića Vlasta,
Karasz Frank E.,
MacKnight William J.
Publication year - 1994
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.1994.070521014
Subject(s) - miscibility , copolymer , compatibilization , phenylene , polymer chemistry , differential scanning calorimetry , materials science , oxide , polymer blend , thermodynamics , composite material , physics , polymer , metallurgy
Miscibility in blends of random copolymers of p ‐bromostyrene ( p BrSt) and o ‐bromostyrene ( o BrSt) [P( p BrSt‐ co ‐ o BrSt)] with partially sulfonylated poly(2,6‐dimethyl‐1,4‐phenylene oxide) (SPPO) have been studied by differential scanning calorimetry (DSC). For an SPPO of given degree of sulfonylation, a miscibility window in terms of the isomeric composition of the brominated copolymer was seen; the location and width of the window was a function of sulfonylation. In general, copolymers with a higher content of p BrSt exhibit miscibility with SPPOs with higher degrees of sulfonylation. Upon annealing to temperatures of 280° and 320°C, only small changes in the miscibility regime were observed. The miscibility behavior was analyzed on the basis of the mean‐field theory in terms of the individual segmental interaction parameters. © 1994 John Wiley & Sons, Inc.