EFFECT OF BROMINATED FLAME RETARDANTS ON THE PROPERTIES OF ACRYLONITRILE VINYL ACETATE COPOLYMER FIBERS/

Two brominated flame-retardant additives, Great Lakes CD-75P (hexabro- mocyclododecane) and Great Lakes PDBS (a polymer of dibromostyrene), a re introduced into acrylonitrile/vinyl acetate (AN/VA) fibers, and the ir effects on the fibers' thermal and mechanical properties, morpholog y, and flammability are investigated Because the additives influence t he viscosity of AN/VA solution dope, the influence of spinneret diamet er on spinning the modified AN/VA fibers is also studied. The results show that the both additives can reduce flammability with little effec t on tensile strength but large effect on the breaking elongation.