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首页> 外文期刊>Journal of Applied Polymer Science >Conductive poly(vinylidene fluoride)/polyethylene/graphene blend-nanocomposites: Relationship between rheology, morphology, and electrical conductivity
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Conductive poly(vinylidene fluoride)/polyethylene/graphene blend-nanocomposites: Relationship between rheology, morphology, and electrical conductivity

机译：导电聚（偏二氟乙烯）/聚乙烯/石墨烯共混物 - 纳米复合材料：流变学，形态学和电导率之间的关系

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摘要

Relationship between rheology, morphology, and electrical conductivity of the poly(vinylidene fluoride)/polyethylene/graphene nano-platelets ternary system (PVDF/PE/GnP) were investigated. All the blend nanocomposites were prepared via a two-step melt mixing method. GnP (0.75 and 1.5 wt %) was first compounded with PVDF and then the resulted premixtuers were melt mixed with PE to achieve the desired compositions. The corresponding reference nanocomposites and filler-less blends were also prepared. Effect of an interfacial agent (PEMA; maleic anhydride grafted polyethylene) was also studied in this work. The results of rheological analysis in conjunction with the Raman spectroscopy experiments revealed that GnP had higher affinity to PVDF than PE, which in turn led to creation of conductive networks of GnP (1.5 wt %) in PVDF matrix exhibiting the electrical conductivity of about 10(-2) (S/cm). Double percolated micro-structure was predicted for the PE/PVDF 40/60 (wt/wt) blend containing low GnP content (0.9 wt %) and confirmed via direct electron microscopy and conductivity analysis. Using 5 wt % of the PEMA reduced the conductivity to 10(-5) (S/cm) and further increase in PEMA content to 10 wt % led to non-conductive characteristics. The latter was attributed to the migration of GnP from the PVDF phase to PE/PEMA phase and hence disturbance of double percolated micro-structure. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46333.
机译：研究了流变学，形态学和聚乙烯/石墨烯纳米血小板三元系统（PVDF / PE / GNP）的关系。通过两步熔融混合方法制备所有混合物纳米复合材料。用PVDF配混GNP（0.75和1.5wt％），然后将得到的预混物熔融混合，与PE混合以达到所需的组合物。还制备了相应的参考纳米复合材料和较少的填充剂。在这项工作中还研究了界面剂（PEMA;马来酸酐接枝聚乙烯）的影响。随着拉曼光谱实验结合的流变分析结果显示，GNP对PVDF具有比PE更高的亲和力，这反过来导致了在PVDF矩阵中的GNP（1.5wt％）的导电网络的产生，表现出约10的电导率为约10（ -2）（s / cm）。预测含有低GNP含量（0.9wt％）的PE / PVDF 40/60（WT / WT）共混物的双渗透微结构，并通过直接电子显微镜和电导分析证实。使用5wt％的PEMA将电导率降低至10（-5）（S / cm），并且PEMA含量进一步增加至10wt％导致非导电特性。后者归因于GNP从PVDF期迁移到PE / PEMA相对PE / PEMA相，因此对双渗透微结构的扰动。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46333。

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