Citation: Ji Wen HU, Ming Wei LI, Ming Qiu ZHANG, Gen Shui CHENG, Min Zhi RONG. A Novel Method for Preparing Polyurethane Based Conductive Composites with Low Percolation Threshold[J]. Chinese Chemical Letters, ;2004, 15(8): 1001-1004. shu

A Novel Method for Preparing Polyurethane Based Conductive Composites with Low Percolation Threshold

1.
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650;
2.
Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Zhongshan University, Guangzhou 510275

Received Date: 20 December 2002
Revised Date: 12 May 2004

A novel method for preparing conductive carbon black filled polymer composites with low percolation threshold from polyurethane emulsion are reported in this paper.The experimental results indicate that with a rise in carbon black concentration the insulator-conductor transition in the emulsion blended composites occurs at 0.8-1.4vol%.In contrast, the solution blended composites exhibit drastic increase in conductivity at conducting filler fraction as high as 12.3-13.3vol%.It is demonstrated that the composites microstructure rather than chemical structure of the matrix polymer predominantly determines the electrical conduction performance of the composites.
- Percolation,
- water-borne polyurethane,
- conductive polymer composites,
- carbon black
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