摘要
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。
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.
关键词
硅烷接枝聚丙烯
复合材料
大分子偶联剂
聚丙烯
silane grafted polypropylene, composite, macromolecular coupling agent
polypropylene