粘土与弹性体改性聚丙烯复合材料的流变性研究

Rheological Behavior of Polypropylene Composites Modified by Polyolefin Elastomer and Organic Reactorite

采用熔融共混法制备了二元复合材料聚丙烯 (PP) /有机粘土 (OREC)体系 (PR体系 )、聚烯烃弹性体 (POE)增韧的PP体系 (P/E体系 )及三元复合材料OREC、POE补强增韧的PRE体系 ,采用毛细管流变仪研究了两种聚合物复合材料的流变性能。结果表明 ,在所研究的范围内PP及PP复合材料体系熔体的流变性均属于假塑性流体 ;对二元体系 ,OREC能够大大改善PP体系的加工流动性 ,在相同条件下PR体系的粘度小于纯PP的粘度 ,且随着粘土添加量的增加 ,粘度的下降幅度增大 ;POE能够改善PP的加工性能 ;三元PRE体系在相同条件下的表观粘度随着POE用量的增加而减小 ,但只有在较大用量及较小剪切力下的表观粘度小于二元体系的表观粘度。

Two binary composites, PP/OREC (polypropylene/organic reactorite) and PP/POE(PP/polyolefin elastomer, and a ternary cpmposite, PP/OREC/POE were prepared via melt blending. Rheological investigation showed that the melts of the composites were all pseudoplastic. The viscosities of the composites were lower than that of pure PP and decreased with increasing content of OREC. The incorporation of POE also improved the processability.