Abstract: Epoxy-terminated phenolphthalein polyaryletherketones (E-PEK) of M_n=1000～8000 were synthesized by reaction of epichhlorohydrin with PEK oligomer having-OK terminal groups prepared by condensation of phenolphthalein (PPH) with 4,4'-dichlorobenzophenone (DCBP) at molar ratios of PPH to DCBP from 1:0.5 to 1:0.9. The E-PEKs were characterized by IR and ¹HNMR spectra,initial glass transtion temperature (T_gi); the melting viscosity and solubility of E-PEK samples were also measured. The E-PEKs were cured with 4, 4'-diaminodiphenylether (DDE) and the glass transition temperatures of the fully erosslinked E-PEK/DDE (T_g∞) were found to be in relation with the initial molecular weight of the oligomer. The T_g∞ values for all samples closslinked were in the range of 183～215℃.

Key words: epoxy-terminated oligomer, phenolphthalein, polyaryletherketone, synthesis