Rt. Patel et al., HYDROXY-TERMINATED ARYL ETHER-SULFONE OLIGOMERS AS CURING AGENTS FOR EPOXY RESINS-SYNTHESIS, CHARACTERIZATION AND THERMAL STUDY, Phosphorus, sulfur and silicon and the related elements, 89(1-4), 1994, pp. 113-117
Oligomeric aryl ether sulfones were prepared by aromatic nucleophilic
substitution reactions of 4,4'-dichlorodiphenyl sulfone with 4,4'-isop
ropylidenediphenol and 4,4'-(1,1-cyclohexylidene)diphenol. The resulta
nt products were characterized by elemental analysis, IR spectral data
, gel permeation chromatography and thermogravimetry. These low molecu
lar weight oligomers were used as curing agents for epoxy resins. The
curing kinetic study was made by differential scanning calorimetry. Th
e cured epoxy resins were observed to possess better heat resistance c
ompared to the resins cured with the traditional curing agents (4,4-di
amino diphenyl sulfone or phthalic anhydride).