聚丙烯/氧化石墨烯共混体系的结晶行为与发泡性能

Crystallization Behavior and Foaming Performance of Polypropylene/Graphene Oxide Blend System

通过熔融共混法制备了聚丙烯(PP)/氧化石墨烯(GO)共混材料,采用超临界CO2进行间歇发泡,制备了PP/G0发泡材料。通过差示扫描量热仪(DSC)、X射线衍射仪(XRD)和偏光显微镜(P0M)对PP/G0共混材料的结晶行为进行了表征。研究结果表明,与纯PP相比,PP/G0共混材料的总结晶速率有所提高,球晶的尺寸减小且分布变窄,晶体的结构无明显变化,但结晶度有所降低;通过扫描电子显微镜(SEM)对PP/G0发泡材料进行了表征,结果表明,PP/GO共混材料的发泡性能较纯PP有明显的提高,当GO的含量为8%时,PP/GO共混材料的平均泡孔尺寸达到最小值,约为8.4μm,其平均泡孔密度达到最大值,约为7.9×10^9个/cm^3。

Polypropylene (PP)/ graphene oxide (GO) blends were prepared by melt blending,and then PP/GO foaming material was prepared by using supercritical C0 2.The crystallization behavior of PP/GO blends were characterized by differential scanning calorimetry (DSC),X-ray diffraction (XRD)and polarized light microscopy (POM),the results showed that compared with pure PP,the total crystallization rate of PP/GO blends was higher,its spherolith size was smaller,and its spherulitic distribution was narrowed,the crystal structure was not changed,but its crystallinity was reduced.The PP/GO foaming material was characterized by scanning electron microscopy (SEM).The results showed that compared with pure PP,the foaming property of PP/GO blends was improved,The best cell morphology was achieved when the content of GO was 8%,its average cell diameter was about 8.4 μm,and its average cell density was about 7.9×10^9 cells/cm^3.