文章摘要
Effect of conductive carbon black and blending with pitch-base CF on electrical and thermal conductivity of NBR
Received:August 29, 2016  Revised:August 29, 2016
DOI：
Key Words: NBR; pitch-based carbon fiber;conductive carbon black;volume resistivity;thermal conductivity
Author NameAffiliationE-mail
CHENG Junmei* Key Laboratory of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science and Technology junmei_cheng@126.com 
ZHANG Dongxia Key Laboratory of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science and Technology  
ZHAO Shugao Key Laboratory of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science and Technology  
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Abstract:
      The mechanical properties, electrical and thermal conductivity of NBR has been investigated against the loading of conductive carbon black (VXC72) and the blending ratio of VXC72 with pitch-based carbon fiber (CF). SEM was employed to observe the filler disperse state in NBR matrix and the influence of double roller mill on L/D of CF by strong shear force. Result shows that with increasing VXC72 loading, tensile strength, tear strength and thermal conductivity of NBR increases almost linearly, volume resistivity of NBR decreases in the form of ladder type, and the percolation threshold is about 25phr. With the ratio of VXC72/CF raising, tensile strength and tear strength of NBR drops evidently, volume resistivity drops marginally, but thermal conductivity increases some extent. thermal conductivity of NBR filled 20 phr CF is higher than that of VXC72 by 30%. Blending sharply reduces the L/D of CF which decreasing from the original 600 to 10-20, that maybe the mainly reason why CF is only little effective in reducing the volume resistivity of NBR.
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