Abstract: Three cardo bisphenols (phenolphalan, phenolphthalimidine and N-methyl-phenolphtha-limidinr) were used to synthesize new polyaryl ether sulfones. The effect of the structuresof various cardo groups on the polycondensation was investigated to provide further expe-rimental evidence for mechanistic study. The results show that all these cardo bisphenolshave a polycondensation behavior similar to phenolphthalein, i.e. the rates of polymer for-mation are much greater than those of polymers from common bisphenols, such as Bisphe-nol-A or Bisphenol-S. The structures of these cardo polymers Were characterized by IR and ¹³C NMR methods.

Key words: Phenolphthalein, Cardo biophenols Polycondensation, Polyarylethersulfone