Premium
Miscibility and enthalpy relaxations in polysulfone—Carboxylated polysulfone blends
Author(s) -
Lau Wayne W. Y.,
Jiang Y. Q.,
Tan Pedro P. K.
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990310207
Subject(s) - polysulfone , miscibility , enthalpy , materials science , polymer chemistry , glass transition , chemical engineering , thermodynamics , polymer , composite material , physics , engineering
Phase behavior in polysulfone‐carboxylated polysulfone (PSf‐CPSf) blends was studied by glass transition observations in conjunction with enthalpy relaxation technique. Miscibility in all proportions was detected in blends where CPSf has a degree of carboxylation (DC, i.e. number of carboxyl groups per repeat unit) less than about 1.3. Partial miscibility was detected in blends for DC > 1.4 and up to DC = 1.9, probably as a result of decreasing intermolecular interactions with increase in DC.