Preparation and Application of Large Particle Size MCA Flame Retardant
A large particle size melamine cyanurate(MCA)flame retardant was prepared by mother liquor reuse.The effects of mother liquor p H value,reaction temperature and reaction time on the particle size of MCA were analyzed using scanning electron microscopy,thermogravimetric analyzer,laser particle size analyzer,etc.The effects of large particle size MCA on properties of nylon 6(PA6)were also studied.The results show that when mother liquor p H value is 5.5～6.5,reaction temperature is 100℃,and reaction time is 2 h,the average particle size of MCA is about 3.5 μm,and the particle size is relatively uniform.PA6/MCA composite material shows good flame retardant properties,and the tensile strength and notch impact strength are less affected by the amount of MCA used.
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