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以双(3-氨基苯基)苯基氧化膦、间苯二胺和间苯二甲酰氯为单体,采用低温溶液缩聚合法合成了含磷芳香族聚酰胺,共聚物的比浓对数粘度为1.44~2.41dL/g。用红外光谱、核磁共振表征了聚合物的结构。利用差示扫描量热法、热失重分析研究了聚合物的热性能,结果表明,随含磷单体的增加,共聚物的Tg略有升高;含磷单体的引入提高了聚合物热稳定性。薄膜的拉伸实验结果表明共聚物具有良好的力学性能。LOI测试表明含磷单体的引入显著提高了聚合物的阻燃性。
A series of polyphosphoric aromatic polyamides were synthesized by polycondensation at low temperature using bis (3-aminophenyl) phenylphosphine oxide, m-phenylenediamine and isophthaloyl dichloride as monomer. The inherent viscosity 1.44 to 2.41 dL / g. The structure of the polymer was characterized by infrared spectroscopy and nuclear magnetic resonance. The thermal properties of the polymers were investigated by differential scanning calorimetry and thermogravimetric analysis. The results showed that the Tg of the copolymers increased slightly with the increase of phosphorus-containing monomers. The incorporation of phosphorus-containing monomers increased the polymer thermal stability. Tensile test results show that the copolymer has good mechanical properties. The LOI test showed that the incorporation of phosphorus-containing monomer significantly improved the flame retardancy of the polymer.