首页 | 本学科首页   官方微博 | 高级检索  
     


Multiple percolation in a carbon‐filled polymer composites via foaming
Authors:M. R. Thompson  G. H. Motlagh  K. J. Oxby  A. N. Hrymak
Affiliation:1. MMRI/CAPPA‐D Department of Chemical Engineering, McMaster University Hamilton, Ontario L8S 4L7, Canada;2. Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran 14395/1311
Abstract:This article describes an investigation into the effects of foaming on the electrical conductivity for a carbon‐filled cyclic olefin copolymer (COC) composite incorporating both chopped carbon fibers (cCF) and carbon black (CB). Foamed and solid samples were injection molded and then analyzed for cell size, fiber length, fiber orientation, and electrical conductivity. Foamed samples exhibited higher electrical conductivity in the through‐plane direction for materials containing only CB or composites containing both filler types, and reduced electrical conductivity in the cCF‐filled composites. The increased electrical property gained by foaming was attributed to multiple percolation with CB aggregates forming more effective conductive clusters and networks in the continuous polymer phase during growth of the gas domains. A mechanism for the phenomenon was proposed based on these experimental observations. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Keywords:electrical conductivity  foam  polymer composite  carbon filler
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号