FUNCTIONALIZED POLYSULFONES FROM 4,4-BIS(4-HYDROXYPHENYL)-PENTANOIC ACID, 2,2-ISOPROPYLIDENEDIPHENOL AND BIS(4-CHLOROPHENYL) SULFONE - SYNTHESIS, BEHAVIOR AND POLYMER ANALOGOUS AMIDATION OF THE CARBOXYLIC GROUPS

Two reactive polysulfones with carboxylic side groups were synthesized by polycondensation of different amounts of 4,4-bis(4-hydroxyphenyl)pentanoic acid (1) and 2,2'-isopropylidenediphenol (bisphenol-A, 2) with bis(4-chlorophenyl) sulfone (3). The amorphous polycondensate 4a was cast from solution in N,N-dimethylformamide (DMF) to produce a homogeneous membrane which is clear and colourless. With ethanol/water as permeate, preferred permeability of water occurs. Additionally, the carboxylic groups of 4a were condensed with several alkylamines via the acyl chlorides. The obtained polysulfones with pendant alkylamido groups show a strong dependence of the glass transition temperature on the side chain length.