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Effects of Strain-Induced Crystallization on Mechanical Properties of Elastomeric Composites Containing Carbon Nanotubes and Carbon Black

탄소나노튜브 및 카본블랙 강화 고무복합재료의 변형에 의한 결정화가 기계적 특성에 미치는 영향

  • Sung, Jong-Hwan (School of Mechanical Engineering, Yeungnam University) ;
  • Ryu, Sang-Ryeoul (School of Mechanical Engineering, Yeungnam University) ;
  • Lee, Dong-Joo (School of Mechanical Engineering, Yeungnam University)
  • 성종환 (영남대학교 기계공학부) ;
  • 류상렬 (영남대학교 기계공학부) ;
  • 이동주 (영남대학교 기계공학부)
  • Received : 2010.12.14
  • Accepted : 2011.07.04
  • Published : 2011.09.01

Abstract

The effects of strain-induced crystallization (SIC) on the mechanical properties of elastomeric composites as functions of extension ratio (${\lambda}$), multiwalled carbon nanotube (CNT) content, and carbon black (CB) content are investigated. The differential scanning calorimetry (DSC) analysis shows that the degree of crystallinity increases with the increase in the CB and CNT content. As ${\lambda}$ increases, the glass transition temperature (Tg) of the composites increases, and the latent heat of crystallization (LHc) of the composites is maximum at ${\lambda}$=1.5. It is found that the mechanical properties have a linear relation with LHc, depending on the CNT content. According to the TGA (thermogravimetric analysis), the weight loss of the composite matrix is 94.3% and the weight of the composites decreases with the filler content. The ratio of tensile modulus ($E_{comp}/E_{matrix}$) is higher than that of tensile strength (${\sigma}_{comp}/{\sigma}_{matrix}$) because of the CNT orientation inside the elastomeric composites.

Keywords

Carbon Nano-Tube;Carbon Black;Differential Scanning Calorimetry Analysis;Thermogravimetric Analysis;Elastomeric Composites

Acknowledgement

Supported by : 한국과학재단

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