Abstract: In this paper, intramolecular flame-retarded PET resins were prepared via copolymerization reaction by using reactive halogen-free ?ame retardant CEPPA as a third monomer. Then flame-retarded PET fibers were fabricated by melting spinning process. The phosphorus contents in the flame-retarded PET resins were analyzed by means of elementary analysis and NMR. The results showed that the majority of CEPPA were directly reacted into the PET chains. The crystallization property, dyeing behavior, mechanical property and flame retardation of the flame-retarded PET fibers were also investigated. The results showed that the crystallinity of flame-retarded PET fiber was decreased as increasing the phosphorus content, which led to the improved dyeing properties of the fibers. The dye-uptake of the fiber with disperse dyes at atmosphere pressure and boiling temperature was above 90%. Moreover, the flame- retarded PET fibers exhibit superior ?re resistance. The limiting oxygen index (LOI) value was about 35% and the anti-dripping property was also improved.

Key words: foame retardant , PET fiber , dyeing property , copolymeriazation reaction