Surface Conductivity of Molded Sheets and Films of Conductive Polymer Compounds

这项研究的目标是建立一种新的技术，在聚合物和聚合物复合材料中实现表面导电性，而不牺牲机械完整性。 导电聚合物在工业应用中的使用范围从绿色轮胎的模塑化合物到汽车的外部车身部件到计算机、笔记本电脑和蜂窝电话的塑料外壳。 导电聚合物的表面和体积导电性有助于消除静电，促进喷漆，并加快热传导速度。在当前技术中，轮胎或外部汽车车身部件的整个主体由导电聚合物化合物模制而成。 15 - 60重量%的导电颗粒中只有一小部分留在表面附近。 在多层制品中制造单独的导电表面层需要提高模制技术和材料组合物的基础知识。本研究将研究模塑聚合物片材和薄膜的有效表面电导率作为模塑条件、组合物和颗粒-颗粒网络形成的运动学的函数。简单形状的实验成型，两层复合材料层压板将进行演示的概念和评估的有效导电性。 研究计划包括绘制粘度-成分-电导率图，以指导导电化合物成分的选择。 预计将提高对控制界面形状和层间结合强度的参数的理解，以及提高成本和生产率的材料选择标准。

The goal of this research is to establish a new technology for attaining surface conductivity in polymers and polymer composites, without sacrificing mechanical integrity. The use of conductive polymers in industrial applications ranges from molding compounds of green tires to exterior body parts of automobiles to plastic housing of computers, notebooks, and cellular phones. The surface and bulk conductivity of conductive polymers help dissipate static electricity, facilitate spray painting, and expedite the rate of heat conduction. In current technology, the whole body of tires or exterior auto body parts is molded from conductive polymer compounds. Only a small fraction of the 15 - 60% by weight of conductive particles remains near the surface. Fabricating separate conductive surface layers in multi-layer articles requires advancing the fundamental knowledge of the molding technology and the material compositions. This investigation will study the effective surface conductivity of molded polymer sheets and films as a function of the kinematics of molding conditions, composition, and particle-particle network formation. Experimental molding of simple shaped, two-layer composite laminates will be conducted to demonstrate the concepts and to evaluate the effective conductivity. The research plan includes the development of viscosity-composition-conductivity diagrams to guide the selection of the composition of conductive compounds. Improved understanding of the parameters governing the shape of the interface and the strength of interlayer bonding is expected, as well as selection criteria for materials to improve cost and productibility.