聚丙烯／改性长石复合材料的制备、性能及结构表征

摘要

以新疆地产哈密长石为原料，对长石进行湿法表面改性。以改性长石作为填料，制备了聚丙烯（PP）／改性长石复合材料，对其性能及微观结构进行了测试和表征。结果表明，改性长石的界面接触角明显增大；与PP基体相比，PP／5％改性长石复合材料的拉伸强度提高了3．78％，冲击强度提高了3．40％，热分解温度提高了6．47℃；改性长石填料起到了部分β-PP晶成核剂的作用，PP／改性长石复合材料的结晶度比纯PP有了不同程度的提高。%Hami feldspar was modified through surface wet method, which was used in polypropylene（PP）/modified feldspar composites. The properties and structure of PP/modified feldspar composites were characterized and analyzed. Results showed that the surface of modified feldspar particle was hydrophobie. The tensile and impact strengths of PP/5 %modified feldspar composites increased by 3.78 %, and 3.40 %, respectively, compared with those of neat PP. The heat decomposition temperature of the composites was 6.47 °C higher than that of neat PP. Modified feldspar acted as nucleation agent which increased the crystallinity of PP.