Synthesis and Properties of Copolyesters Containing Phosphorus in Main Chains

A flame-retardant copolyester containing phosphorus in the main chain of macromolecules was synthesizedfromterephthalic acid, ethylene glycoland 2-carboxyethyl(phenylphosphinic) acid (HPPPA). An optimum reaction condition for synthesizing the copolyester was determined by theorthogonal design method. The resulting copolyesterswere characterized by FTIR. The thermal stability, rheological property and flame retardancy of copolyesters were also investigated. This kind of copolyester containing phosphorus in the main chain has very good stability andflame retardancy, and can be used to manufacture the flame retardant fibers.