Synthesis And Characterization Of A Kind Of High Performance Polymers-Polyarylene Sulfide Sulfone(Ketone) Amide And Copoly(Arylene Sulfide Sulfone/arylene Sulfide Amine)

In the beginning of this paper,we simply introduced the performances and synthesis methods of Poly(phenylene sulfide sulfone) (PPSS), Poly(phenylene sulfide amine) (PPSA), Poly(phenylene sulfide ketone) (PPSK) and some copolymers.The research work of this paper include two part:(1)Synthesis and characterization of a kind of high performance polymers- polyarylene Sulfide slfone(ketone) amide (2) Normal pressure synthesis and characterization of a kind of copoly (arylene sulfide sulfone/ arylene sulfide amine)First: Diamine monomers containing sulfide and sulfone or ketone group were synthesized by the reaction of 4,4'-dichloro diphenyl sulfone or 4,4'-difiuodibenzo-phenone with 4-aminothiophenol in the presence of NaOH, K₂CO₃ or Na₂CO₃ in N,N-dimethyl formamide (DMF)and dimethyl acetamide (DMAC) solvents. The method of synthesis monomers was carefully investigated. We obtained high purity monomers.Then Polyarylene sulfide sulfone amide (PASSA) and Polyarylene sulfide ketone amide (PASKA) with high molecular weight were synthesized by a low temperature solution polycondensation reaction in the solvent of anhydrous N-methyl-pyrrolidone(NMP).The optimum technological conditions of synthesis of PASSA and PASKA resin were gained by exploring the synthetic methods of PASSA and PASKA elaborately and repeatedly, which had excellent stability, high-viscosity product and good repeatability, and high molecular weight PASSA and PASKA resins with the maximum viscosity of 0.75g/dL and 0.60g/dLwas attained. The structures of monomers were characterized by FT-IR spectrum, H-NMR spectrum. The chain and aggregative structures of PPSSA and PPSKA were characterized by FT-IR spectrum, UV absorption spectrums, wide-angle X-ray diffraction spectrum(XRD). XRD resuls showed that untreated PASSA and PASKA samples are amorphous.Physical properties of the polymer,including thermal stability and solubility, were also studied. DSC and TG analyses revealed that the glass transition tem-perature(Tg)for PASSA and PASKA are 274.9℃and 195.2℃respectively, the initial degradation temperatures (Ti) for PASSA and PASKA are 461.55℃and 445.88℃respectively which suggests that PASSA and PASKA are good heat-resistant mate-rials.From the research of dissolvability of PASSA and PASKA, it can be obviously conformed that PASSA and PASKA is a kind of resin to excellent chemical corrosion resistant property.Second: In order to improve dissolvability and the thermal property of poly-(phenylene sulfide amine) and poly(phenylene sulfide sufone),we synthesized the copolymer of poly(arylene sulfide sulfone/arylene sulfide amine)(PASS/A).many methods were tried to synthesize the PASS/A copolymer at normal pressure. Finally, we find that the reaction conditions such as modes of adding monomer, monomer ratios of materials, reaction temperature and time have obvious effects on molecular weight of the copolymer. By optimizing the PPSS /A synthetic schemes, high molecular weight PASS/A who's viscosity reach 0.40dL/g was prepared The copolymer's chain structures were characterized by FT-IR spectrum and ¹H-NMR and X-ray diffraction demonstrated. The copolymer's aggregative structures were characterized by XRD.The copolymer was demonstrated to be amorphous but with local ordering structures at the content of amine variation in the range of 0-30%.Thermal properties were researched and the results showed that with the increase of the content of amine , Tg,Ti and Tmax became a little drop;but The copolymers have the higher remainder at high temperature.