聚丙烯/聚烯烃弹性体/硅灰石复合材料的制备与热学力学性能

Preparation and Thermal/Mechanical Properties of Polypropylene/Polyolefinelastomer/Wollastonite Composites

采用熔融共混的方法制备聚丙烯(PP)/聚烯烃弹性体(POE)/硅灰石(Wollastonite)复合材料,利用万能材料试验机、悬臂梁冲击机、差热扫描量热仪(DSC)和扫描电镜(SEM)研究了聚烯烃弹性体和硅灰石对聚丙烯的力学性能及热性能的影响。结果表明,POE弹性体对PP有很好的增韧作用,提高了PP的冲击强度,硅灰石在一定程度上有增强的作用,提高了PP/POE的拉伸强度;POE和硅灰石使复合材料的结晶温度有所提高,但使熔点有所降低。当POE占3%(质量分数,下同),硅灰石占3%时,复合材料的热学、力学性能最优,冲击强度比纯PP高出15.4%,拉伸强度高出2.6%,结晶温度高出5℃。

a series of polypropylene（PP）/polyolefin elastomer（POE）/wollastonite were prepared by melted blending method,The influences of POE and wollastonite on the thermal and mechanical properties of the composites were studied by universal material testing machine,impact test machine,differential scanning calorimetry（DSC） and scanning electron microscope（SEM）.The results show that the composites have higher tough property due to the presence of POE in the matrix.The tensile strength is improved by the addition of wollastonite.However,the crystallizing point of the composites increases while the melt point reduces.As a result,when the content of POE is 3% and wollastonite is 3%,the composites has the best thermal and mechanical properties： the impact strength is 15.4% more than that of PP and the tensile strength is 2.6% high than of PP,the crystallization temperature is also 5 ℃ above that of PP.