Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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PTC/NTC Properties of Carbon Black/HDPE Conductive Composites Containing Elastomer

엘라스토머를 함유한 Carbon Black/HDPE 전도성 복합재료의 PTC/NTC 특성 연구

  • 박수진 (한국화학연구원 화학소재연구부) ;
  • 서민강 (한국화학연구원 화학소재연구부) ;
  • 김학용 (전북대학교 섬유공학과(공업기술연구소)) ;
  • 이덕래 (전북대학교 섬유공학과(공업기술연구소))
  • Published : 2002.08.01
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Abstract

The effects of elastomer and carbon black contents on the positive temperature coefficient(PTC) and the negative temperature coefficient(NTC) behavior of carbon black (CB)-filled HDPE composites are studied. The 20~50wt% CB-filled HDPE composites containing 0, 1, 3 and 5wt％ elastomer are prepared using an internal mixer and compression-molded at 18$0^{\circ}C$ for 10min. The PTC/NTC behavior of the composites is dependent on the CB and elastomer contents. The PTC behavior is due to the breakage of the conductive networks, caused by the thermal expansion at the melting temperature of HDPE and the NTC behavior is caused by reformation of conductive chains, resulting from the relaxation of polymer structure and reagglomeration of CB particles. It is found that the impact strength of the composites containing elastomer is improved, even though they exhibit slight decrease in PTC intensity. This probably resulted from the improvement of impact damping, due to the increase in the internal stress of the composites.

Keywords

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