Abstract

In view of the poor tensile strength of polypropylene (PP) fibers, PP composite fibers reinforced with high density polyethylene (HDPE) and modified graphene were prepared by a melt extrusion method. The effects of graphene and HDPE on the PP fibers were studied by tensile strength measurement, infrared spectroscopy (IR), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA). The results showed that when 25 phr (parts per hundred resins) of HDPE were added, the tensile strength of the modified PP fibers reached 2.46 × 10² MPa, an increase by 9.3%, and with the addition of 0.3 phr graphene and 25 phr HDPE, the mechanical and thermal properties of graphene/HDPE/PP composite fiber, the 25 phr HDPE with 0.3 phr graphene evenly dispersed in the PP, were the best; the tensile strength increased by 11.1% and the thermal decomposition temperature increased by 197 °C compared to the pure PP fiber; the PP and HDPE were compatible.

摘要

鉴于聚丙烯（PP）纤维的拉伸强度差，通过熔融挤出法制备了由高密度聚乙烯（HDPE）和改性石墨烯增强的PP复合纤维。通过拉伸强度测量，红外光谱（IR），扫描电子显微镜（SEM），热重分析（TGA）研究了石墨烯和HDPE对PP纤维的影响。结果表明，当添加25 phr（每百份树脂中的份数）HDPE时，改性PP纤维的拉伸强度达到2.46×10 ^2。 MPa，增加9.3％，并添加0.3 phr石墨烯和25 phr HDPE，石墨烯/ HDPE / PP复合纤维，0.3 phr石墨烯均匀分散在PP中的25 phr HDPE的机械性能和热性能最好的; 与纯聚丙烯纤维相比，抗张强度提高了11.1％，热分解温度提高了197°C。PP和HDPE兼容。