SYNTHESIS OF NEW AROMATIC POLY（AMIDE IMIDE）S FROM UNSYMMETRICAL EXTENDED DIAMINE CONTAINING A PHTHALAZINONE MOIETY
摘要
The direct polymerization of an unsymmetrical kink non-coplanar heterocyclic diarnine (1) with various aromatic bis(trimellitimide)s (2a-e) using triphenyl phosphite and pyridine as condensing agents could generate a series of new aromatic poly(amide imide)s (3a-e) containing the kink non-coplanar phthalazinone heterocyclic units in the polymer main chains with inherent viscosities of 0.58-0.66 dL/g. The polymers are readily soluble in a variety of solvents such as N,Ndimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, N-methy1-2-pyrrolidinone, pyridine and m-cresol and can be cast to form flexible and tough films. The glass transition temperatures of polymers (Ts) are in the range of 301-327℃,and the temperatures for 5% weight loss in nitrogen are in the range of 498-521 ℃.