Preparation of polyacrylate-based conductive coatings and its PTC effect

Xiong Chuan-xi; Hu Hui-rong; Zhou Zhi-yong; Zhang Yi; Dong Li-jie

doi:10.1007/BF02838356

Journal of Wuhan University of Technology Materials Science Edition ›› 2004, Vol. 19 ›› Issue (1) : 26 -29. DOI: 10.1007/BF02838356

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Preparation of polyacrylate-based conductive coatings and its PTC effect

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Abstract

Polyacrylate-based conductive coatings were prepared from polyacrylate emulsion as matrix and carbon black (CB) whose surface was treated with titanate coupling agent as conducting particles. One kind of organic crystal was added to study its effects on the electrical conductivity and PTC (positive temperature coefficient) effect of the conductive coatings. Experimental results show that the coatings containing only polyacrylate emulsion and CB exhibit an excellent electrical conductivity but bad PTC effect, and when organic crystal is added, PTC effect is characterized and can increase by 2 orders of magtitude. The critical transformation temperature of polyacrylate emulsion/CB PTC composites is decided by melting point of organic crystals.

Keywords

carbon block / PTC effect / organic crystal

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Xiong Chuan-xi, Hu Hui-rong, Zhou Zhi-yong, Zhang Yi, Dong Li-jie. Preparation of polyacrylate-based conductive coatings and its PTC effect. Journal of Wuhan University of Technology Materials Science Edition, 2004, 19(1): 26-29 DOI:10.1007/BF02838356

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