Study on the Preparation and Properties of the Phosphorus-Containing Flame Retardant PET Copolymer

The phosphorus-containing flame retardant PET was synthesized by adding different content CEPPA. The study found that the flame retardant and char formation abilities of PET increased with CEPPA content increasing, but the melting point, glass transition temperature and melt crystallization temperature decrease, and the anti-drip properties got worse and then better. It is attributed to the introduced C-P bond energy of the main chain was much smaller than the C-C bond energy.