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Abstract
Oligomeric aryl ether sulfones were prepared by aromatic nucleophilic substitution reactions of 4,4′-dichlorodiphenyl sulfone with 4,4′-isopropylidenediphenol and 4,4′-(1,1-cyclohexylidene)diphenol. The resultant products were characterized by elemental analysis, IR spectral data, gel permeation chromatography and thermogravimetry. These low molecular weight oligomers were used as curing agents for epoxy resins. The curing kinetic study was made by differential scanning calorimetry. The cured epoxy resins were observed to possess better heat resistance compared to the resins cured with the traditional curing agents (4,4-diamino diphenyl sulfone or phthalic anhydride).