Chemical modification of oligophenylenes with acenaphthenyl groups

Oligophenylenes with acetonaphthenyl groups were synthesized by polycondensation of 4,4'-diacetyldiphenyl oxide or 4,4'-bis(4-acetylphenoxy)diphenyl sulfone with acetylacenaphthene. Acetonaphthenyl groups of oligophenylenes were converted into acenaphthylenyl moieties using various dehydrogenation techniques. Curing oligomers with acenaphthylenyl groups at 250-300°C yielded cross-linked polymers exhibiting heat resistance up to 400°C.