PP/PS/纳米插层高岭土复合材料的制备及性能研究

采用熔融共混法制备了聚丙烯/聚苯乙烯/二甲基亚砜插层改性高岭土（PP/PS/K-DMSO）复合材料。研究了不同用量K-DMSO对PP/PS共混材料的结构及性能的影响。结果表明，随着K-DMSO的加入，复合材料的加工性能、力学性能、热性能均得到提高；与PP/PS共混材料相比，在K-DMSO的加入量为6 %（质量分数，下同）时，熔融流动速率增加了2.925 g/(10min)，冲击强度提高了48.8 %，弯曲强度提高了24.1 %。扫描电镜分析表明，K-DMSO的加入,使PP与PS两相界面模糊，PS分散相尺寸减小，增加了PP、PS的相容性。

Preparation and Properties of Polystyrene/Polypropylene/ Nano-interrelated Kaolinite Composites

Nanocomposites of PP/PS/DMSO-intercalated kaolinite were prepared via melt blending. Studies of properties and structure of the composites showed that the addition of modified DMSO-kaolinite improved the processing behavior, mechanical properties, and thermal stability. Compared with neat PP/PS, the melt flow index increased 2.925g·10min-1, the impact and tensile strengths of the composites increased by 48.8% and 24.1%, respectively, when the content of the DMSO-kaolinite was 6 wt%. The scanning electron microscope(SEM) showed that the size of polystyrene domains decreased with K-DMSO added, and the compatibility of PP and PS was increased.