EPS木塑复合材料的制备及阻燃改性

Preparation and Flame Retardant Treatment of EPS Wood Plastic Composite

通过模内发泡成型工艺制备了EPS/刨花木塑复合材料,并采用三聚氰胺磷酸盐对其进行了阻燃改性。进行了力学性能、燃烧性能测试,研究了刨花及三聚氰胺磷酸盐对复合材料性能的影响,并对其阻燃机理进行了分析。结果表明,向EPS中加入等量刨花,能使其极限氧指数显著提升,达到了26.3%,与EPS相比,提升了46.1%。MPP对WPC力学性能具有显著影响,当继续加入22.5份MPP时,复合材料的力学性能明显提高,冲击强度达到466.67 J/m^2,静曲强度达到了1.35 MPa,与WPC相比,冲击强度和静曲强度分别提高了191.7%、77.6%。热释放速率峰值降低且推后,在燃烧过程中,总热释放小幅降低,极限氧指数达29.7%,垂直燃烧等级达V-0级。

EPS/WP wood-plastic composite was prepared by in-mold foaming process and flame retarded by melamine phosphate.The mechanical properties and combustion properties were tested.The effects of shavings and melamine phosphate on the properties of composite were studied.The flame retardant mechanism was also analyzed.The results showed that the addition of equal amount of shavings to EPS increased the limiting oxygen index significantly,and the limiting oxygen index reached 26.3%.Compared with EPS,the limiting oxygen index increased by 46.1%.MPP had a significant effect on the mechanical properties of WPC,and continued to add 22.5 parts.At MPP,the mechanical properties of the composites were significantly improved,the impact strength was increased to 466.67 J/m^2,and the static bending strength was 1.35 MPa.Compared with WPC,the impact strength and static bending strength were increased by 191.7%and 77.6%,respectively.The peak release rate was reduced and pushed back.During the combustion process,the total heat release was reduced,the limiting oxygen index was 29.7%,and the vertical burning level was V-0.