Synthesis and characterization of the hyperbranched polyamide with triphenyl phosphorus structure and the influence on mechanical property of ny!on-6

摘要

Due to the unique molecular structure, hyperbranched polymers showed many characteristics,such as high solubility, low viscosity and high-activity. Therefore, it had been widely applied in different areas. In this paper, isophthaloyl chloride(IPC) was used as A_2 monomer and tri (3-aminophenyl) phosphine oxide(TAPPO) was used as B3 monomer, compounding hyperbranched polyamide with triphenyl phosphorus structure . The best reaction conditions were obtained that the molar ratio of TAPPO and IPC was 1.5:1, the reaction temperture was 50°C, the reaction concentration was 0.1 mol/L and the reaction time was 2h.Besides, the structure of the polymer was characterized by FT-IR and H1-NMR analysis.The ~1H-NMR result showed that the branched degree of hyperbranched polyamide was 0.36.The DSC result showed that the glass transition temperature (Tg) was 130.7 °C. When the addition of P-HBPA content was 0.5% in PA6/P-HBPA blends, the properties of tensile strength, elongation at break and impact strength reached the maximum.