阻燃改性木粉/聚苯乙烯复合装饰材料的性能

以含聚磷酸铵（APP）阻燃剂的木粉增强体制备复合材料。利用热重分析测试、极限氧指数测试、衰减全反射红外光谱分析、力学性能测试研究了阻燃改性复合材料对木粉/聚苯乙烯(PS)复合材料的阻燃性能和力学性能的影响。结果表明：相比未改性的木粉/聚苯乙烯复合材料，用APP改性木粉/聚苯乙烯复合材料改善了木塑复合材料的耐热性和阻燃性。当添加5%-20%APP含量时，最大热损失速率由13.02%·min-1降低到11.63%·min-1，热降解性能提高；成炭率和LOI值提高，阻燃性能增强。但是与未添加APP的复合材料相比，添加20%APP时，抗弯强度由71.3MPa降低到54.2MPa, 降低了24%; 拉伸强度从35.3MPa降低到24.8MPa, 降低了30%，APP的加入使复合材料的力学性能降低。

Study on Properties of Flame-retardant Modified Wood Flour/Polystyrene Composites

The composite material was prepared by using wood powder containing ammonium polyphosphate (APP) flame retardant as a reinforcement. Whether or not APP can improve the flame-retardant and mechanical properties the WF/PS composites were studied based on thermogravimetric analysis, limiting oxygen index (LOI) test, attenuated total internal reflectance fourier transform infrared sprctium analysis , mechanical instrument. The results show that the APP modified wood flour/polystyrene composite improves the thermal degradation performance and flame retardancy of wood-plastic composites compared with unmodified wood flour/polystyrene composites. When the content of 5%-20% APP was added, the maximum heat loss rate was reduced from 13.02%·min-1 to 11.63%·min-1, and the thermal degradation performance was improved; the carbon formation rate and LOI value were increased, the flame retardant performance was enhanced. However, compared with the composite without added APP, when adding 20% APP, the flexural strength decreased from 71.3MPa to 54.2MPa, which was reduced by 24%; the tensile strength decreased from 35.3MPa to 24.8MPa, which was reduced by 30%, The addition of APP reduces the mechanical properties of the WF/PS composite.