硅烷接枝聚丙烯对聚丙烯复合材料性能的影响

目的研究硅烷接枝聚丙烯（PP－g－Si）对不同填料如滑石粉（Ta）、碳酸钙和硫酸钡填充的PP复合材料性能的影响，方法分别制备经PP－g－Si偶联的滑石粉、CaCO3和BaSO4填充的PP复合材料，并测试其机械性能和结晶熔融行为，结果与未经偶联的体系相比，在一定PP－g－Si含量范围内，PP－g－Si可使T3／PP体系力学性能提高，但拉伸模量降低；而对PP／CaCO3和PP／BaSO4体系的力学性能影响不大或使其性能有所降低，同时，PP－g－Si对这3种填料填充的PP体系中PP的结晶熔融行为也有较大影响，结论在实验范围内，PP－g－Si对聚丙烯和滑石粉界面有增容作用，可作为PP／Ta材料的大分子偶联剂，而对PP／CaCO3和PP／BaSO4体系则没有增容作用。

The Effect of Silane Grafted Polypropylente on the Property of Different Filler/Polypropylene Composites

Aim To determine the effect of silane grafted polypropylene on the property of different filler/polypropylene composites. Methods Polypropylene (PP) composites filled with talc(Ta), baryta sulfate and calcium carbonate coupled with silane grafted polypropylene (PP-g-Si) were made, their mechanical properties and thermal properties were investigated, respectively. Results As compared with the non-coupled composites, the mechanical properties of PP/Ta/PP-g-Si composites were improved to some extent, though the values of tensile modulus and the strain at peak were decreased. But for PP/BaSO4 and PP/CaCO3 composites, the values of their mechanical properties varied slightly or even decreased with increasing PP-g-Si content within the experimental component. Meanwhile, PP-g-Si also affected the melting and crystallization behavior of PP in the composites. Conclusion PP-g-Si offers compatibilization in PP/Ta composites, but offers no-compatibilization in PP/BaSO4 and PP/CaCO3 composites within the extent of the present range of PP-g-Si, which shows that PP-g-Si can be used as the macromolecular coupling agent of PP and Ta composite.