Preparation and properties of MCA flame retardant nylon 66
Melamine cyanurate(MCA)flame retardant nylon 66(PA 66)composite material was prepared by melt blending u-sing MCA as flame retardant.The effect of MCA addition on the thermal stability,flame retardance and mechanical properties of the composite material was studied.The results showed that MCA had good thermal stability at temperatures of 30-300℃;the addition of MCA can effectively improve the flame retardance of PA 66,the limit oxygen index of the flame-retardant PA 66 com-posite material reached 32.7%and the vertical combustion test reached V-0 level when the mass fraction of MCA was 10%;how-ever,compared with those of pure PA 66,the mechanical properties of the flame-retardant PA 66 composite material decreased in some degree,the tensile strength decreased from 65.24 MPa to 37.26 MPa,the elastic modulus decreased from 432.17 MPa to 350.39 MPa,and the elongation at break decreased from 380.34%to 46.55%.
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