Synthesis and Characterization of Flame Retardant Polyester Copolymer

The flame-retardant polyester containing the new phosphorus-nitrogen flame retardant Fyrol-6 was synthesized by copolymerization method,the optimized reaction conditions by changing the reaction temperature,reaction time and amount of catalyst was got.Under the optimized conditions,the flame retardant polyester,with the flame retardant quality content of 5%,10%,15%,20%of the terephthalic acid bis-hydroxyethyl methacrylate(BHET),were synthesized which were characterized by means of FT-IR,TG and LOT.The results showed that the flame-retardant polyester contained the structure features of BHET,Fyrol-6 and OPA.After the flame retardant agent was added into the molecular chain of PE,the thermal stability was improved.The obtained flame retardant polyester had a higher LOI value.The new flame-retardant polyester WAs expected to be applied to PET retardant modified as an additive flame retardant.