【摘要】 介绍了用插层改性蒙脱石制备聚丙烯纳米复合材料的方法 ,并对纳米复合材料的力学性能和微观结构进行了分析。结果表明 :采用季胺盐 苯乙烯两步复合插层改性的蒙脱石 ,在双螺杆挤出机中同聚丙烯熔融混合后可达到纳米级分散 ,蒙脱石分散片层厚度 <5 0nm ,制备的蒙脱石 /聚丙烯纳米复合材料拉伸强度 33.9MPa、弯曲强度 4 6 .3MPa、冲击强度 74 .2kJ/m2 、热变型温度 (1.82MPa) 5 6℃ ,分别较纯聚丙烯树脂提高了 5 .78%、2 8.2 5 %、1.6 4%和 2 3.6 2 %。更多还原

【Abstract】 The method for preparing PP nano-composites using modified montmorillonite isintroduced in this article. The mechanical property and microscopic structure of nano-composites is also analyzed. Test results showed that intercalation of montmorillonite with quaternary ammonium salt and styrene can be carried out by two-stage intercalation reaction. After mixed with PP and the mixture is melted and extruded in double spiral-lobe extruding machine,it is transformed into nano-composites. The products obtained can be satisfactory dispersed in PP at the size of <50nm. The tensile strength of the composites is 33.9MPa, flexural strength is 46.3MPa, impulsive strength is 74.2kJ/m~2, heat distortion temperature(1.82MPa)is 56℃. Compared with pure PP, these performance parameters are increased in 5.78%, 28.25%, 1.64% and 23.62% respectively.更多还原