کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
822884 | 906812 | 2007 | 7 صفحه PDF | دانلود رایگان |
The results presented in this paper reveal the first evidence that two types of percolation thresholds can coexist in an insulator–conductor-system, the higher one attributed to a static and the lower one to a kinetic network formation process. Detailed measurements at concentrations above the statistical percolation threshold show a power law dependence of conductivity on filler concentration (with an exponent of 2.7) that is independent of the processing condition. A simplified model of percolated particles was developed in order to relate the sample conductivity to the contact resistance between individual particles embedded within a polymer matrix. Our results are compared with previous studies in order to correlate the contact resistance values to different materials and processing conditions.
Journal: Composites Science and Technology - Volume 67, Issue 5, April 2007, Pages 922–928