等规聚丙烯/针状硅灰石复合材料性能的研究

将针状硅灰石、马来酸酐接枝聚丙烯(PP-g-MAH)和等规聚丙烯(iPP)经双螺杆挤出机熔融共混,制备了iPP/硅灰石复合材料。研究了共混工艺条件、PP-g-MAH和硅灰石用量对iPP/硅灰石复合材料力学性能和熔体质量流动速率的影响;用光学显微镜和扫描电子显微镜分别观察了硅灰石共混前后的形貌和iPP/硅灰石复合材料冲击试样断面的形貌。实验结果表明:硅灰石采用侧喂料和较低的螺杆转速,可以提高iPP/硅灰石复合材料力学性能。随着硅灰石质量分数的增加,复合材料的力学性能提高。在PP-g-MAH质量分数为1%,硅灰石质量分数为30%时,iPP/硅灰石复合材料力学性能最好。

Study on Properties of IPP/Needle-like Wollastonite Composite Material

IPP /wollastonite composite material was prepared with needle-like wollastonite,PP-g-MAH and iPP blending by co-rotation twin-screw extruder.The effects of blending process conditions,contents of PP-g-MAH and wollastonite on mechanical properties and melt flow rate of iPP / wollastonite composite were studied.The features of wollastonite before and after blending and the morphology of the impact fracture features of iPP / wollastonite composite material were observed with optical microscope and SEM.The results showed that the mechanical properties of iPP / wollastonite composite materials were improved with side feeding of wollastonite and lower screw speed.The properties of composite materials were improved with the increase of the content of wollastonite.When the content of PP-g-MAH was at 1%,wollastonite at 30%,the me-chanical properties of iPP / wollastonite composite materials were the best.