Synthesis And Properties Of Phosphrous-Containing Poly(aryl Ether Ketone)s With Bisphenol-S Moiety

2-(6-oxide-6H-dibenz<1, 2> oxa phosphorin-6-yl)-1,4-dihydroxy- phenylene (DOPO-HQ) which has P in its side chain was synthesized at first. We amended its synthesis ways, and the structure of the DOPO-HQ was characterized by FT-IR, ¹H-NMR and DSC, and then bis (4-chloroformyl) phenylphosphine oxide (FPPPO) which has P in its main chain was also synthesized and characterized by FT-IR, ¹H-NMR, ³¹P-NMR, element analysis and DSC.Two series of phosphorus-containing PAEKs with biphenyl-S moiety were synthesized by high-temperature solution polycondensation, which 1, 4-bis (4-fluoro-benzoyl) benzene (1, 4-FBB) or 4, 4'-diflourodiphenylketone (DFK), DOPO-HQ, biphenol-S were used as monomer. The influences of reaction conditions such as reaction temperature, reaction time, and concentration of reactants on polymerization were studied. The PAEKs were characterized by FT-IR, ¹H-NMR and DSC, the thermal stabilities of PAEKs were measured by TGA. The solvencies of phosphorus-containing PAEKs were measured also. The results indicate that introducing DOPO-HQ into PAEKs' structure can increase its Tg and thermal stability and improve its solvencies in organic solvent.A novel phosphorus-containing-in-main-chain PAEK with biphenyl-S moiety (PEEKKS-MP) was synthesized by FPPPO and bisphenol-S through high-temperature solution polycondensation. The structure and properties of the PEEKKS-MP were characterized by FT-IR,¹H-NMR, ³¹P-NMR and DSC and TGA, and the solvency of the PEEKKS-MP was also measured. The results indicate that the Tg of PEEKKS-MP was 235℃, and it can be soluble in most ordinary solvents. The PEEKKS-MP possessed good film ability and the properties of thin film of PEEKKS-MP was tested, such as mechanics property, electrical property and oxygen index, the LOI of PEEKKS-MP was 45, which indicates it possessed excellent flame retardancy.