A novel heterocyclic poly (aryl ether ketone ketone) (PPEKK) containing cyclohexenering was prepared from 1-methyl-cyclohex-1-ene-4, 5 -diyl-bis(4-chlorophenyl methanone) and 4 (4-hydroxyphenyl)(2H) phthalazin-1-one. The polymer was characterized by FTIR, 1HNMR, DSC,TG and X-ray analysis.
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