A series of multiblock copolymers composed of polyether ketone ketone(PEKK) and 4,4′-diphenoxydiphenylsulfone(DPODPS) were synthesized by polycondensation of acyl chloride-terminated PEKK oligomers and 4,4′-diphenoxydiphenylsulfone.

A series of polyether ketone ketone (PEKK)/polyether ketone ether ketone ketone (PEKEKK) containing naphthalene group random copolymers were synthesized by low temperature solution polycondensation of diphenyl ether(DPE), 4,4′bis(αnaphthoxy) benzophenone (DNBP) and terephthaloyl chloride (TPC) in 1,2dichloroethane and in the presence of AlCl3 and NMP.

A series of random copolymers of polyether ketone ketone (PEKK)/polyether ketone ether ketone ketone(PEKEKK) were prepared by low temperature solution polycondensation of diphenyl ether, 4,4′ diphenoxybenzophone, terephthaloyl chloride and isophthaloyl chloride in the presence of aluminum chloride, 1,2 dichloroethane and NMP.

A series of modified poly(aryl ether ketone ketone) were prepared from 3 methyldiphenyl ether(MPE),terephthaloyl chloride(TPC) and diphenyl ether(DPE) in a catalyst/solvent system of AlCl 3/ClCH 2CH 2Cl/NMP by Friedel Crafts electrophilic polymerization.

Poly(aryl ether ketone ketone) were prepared by polycondensation of diphenyl ether and tereph-thaloy] chloride in the presence of aluminum chlorid and N,N-dimethylformamide Catalyst,1.

High Performance Aviation and Spaceflight Material——PEKK;

STUDY ON THERMAL STABILITY OF PEKK AND SPEKK;

The performance,synthesis and modification research of five kinds of high performance poly(aryl ether ketone)(PAEK) such as PEK,PEEK,PEEKK,PEKK,PEKEKK are summarized,and their applications are presented.

A series of poly(ether ketone ketone)/poly(ether ketone ether ketone ketone) random copolymers containing naphthalene ring were synthesized by low-temperature solution polycondensation of diphenyl ether and 4,4′-di(β-naphthoxy)benzophenone with aromatic diacid chlorides such as terephthaloyl chloride(TPC) and isophthaloyl chloride(IPC) in the presence of AlC.

A series of poly(ether ketone ketone ether ketone ketone)/ poly(ether ketone ketone)(PEKKE.

The physical properties of polyetherketoneketone and sulphonated polyetherketoneketone, such as density, water absorption, solvent resistance and electrical properties were studied.

The effect of duration of polyetherketoneketone dissolved in concentrated sulfuric acid on its intrinsic viscosity by blending several series of polyetherketoneketone with different molecular weight was investigated.