Structures and properties of flame retardant vinylons and development trend thereof

Flame retardant vinylons,possessing high strength,high modulus and flame retardance,have wide applications.A systematic introduction of the structures and properties of chloro vinylon,CY841 flame retardant vinylon,high-strength bromine/antimony composite flame retardant vinylon and high-strength halogen-free flame retardant vinylon is made.The advantages and disadvantages of the above four kinds of fibers are compared through X-ray diffraction(XRD),scanning electron microscopy(SEM),optical microscopy,limit the oxygen index and other test methods.The development trend and application prospect of flame retardant vinylons are also presented.