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| Electrical Properties of Conductive Polymer Composites With Special Morphology |
| LU Chang, HU Xiaoning, HE Yuxin, LIU Jichun, ZHANG Yuqing |
| Key Lab of Polymer Science and Nanotechnology, Chemical Engineering & Pharmaceutics School, Henan University of Science and Technology, Luoyang 471003 |
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Cite this article:
LU Chang HU Xiaoning HE Yuxin LIU Jichun ZHANG Yuqing. Electrical Properties of Conductive Polymer Composites With Special Morphology. Chin J Mater Res, 2012, 26(1): 37-43.
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Abstract The maleic anhydride grafted polypropylene (PP–g–MAH) was first reacted with carbon black (CB) and then blended with polypropylene/nylon6 (PP/PA6) to prepare the PP/PA6/PP–g–MAH/CB composites. The special morphology and electrical properties of the composites were investigated. The results show that in PP/PA6/CB blends, CB preferentially localizes in the PA6 phase and the percolation threshold is 2%. However, in the PP/PA6/PP–g–MAH/CB blends, CB particles can be induced by PP–g–MAH to localize at the interface. The composites of PP/PA6/PP–g–MAH/CB have conductivity even when PA6 and PP phases form sea–island morphology. The percolation threshold of PP/PA6/PP–g–MAH/CB is 1.6%, which is lower than that of PP/PA6/CB. Moreover, the PTC (positive temperature coefficient) intensity of PP/PA6/PP–g–MAH/CB composites is stronger than that of PP/PA6/CB, and the negative temperature coefficient (NTC) effect was eliminated within the temperature range of 90 and 135?C. The electrical properties of PP/PA6/PP–g–MAH/CB can be explained in terms of its special interface morphology: PP–g–MAH and CB localize at interface to form the conductive pathways.
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Received: 16 November 2011
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| Fund: Supported by National Natural Science Foundation of China No. 51003024 and the Foundation for University Young Key Teacher by He‘nan Province of China. |
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