Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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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
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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.

고무복합재료에 대해 변형에 의한 결정화(SIC)가 기계적 특성에 미치는 영향을 연신율(${\lambda}$) 및 다중벽 탄소나노튜브(CNT)와 카본블랙(CB)의 함유량을 함수로 하여 연구하였다. 시차 주사 열량(DSC) 분석을 통해 CB 및 CNT의 함유량에 따라 결정화 정도가 증가함을 확인 하였다. 또한 연신율이 증가함에 따라 복합재료의 유리전이온도(Tg)는 증가하였고, 결정화 잠열 값(LHc)은 ${\lambda}$=1.5에서 최대값을 보였다. CNT의 함유량 증가에 따라 기계적 특성과 LHc는 비례관계임을 확인하였다. 열 중량 분석(TGA)을 통해 기지의 소실율은 94.3%였고, 복합재료의 소실율은 보강재의 함유량 증가에 따라 감소하였다. 인장탄성율 비는 고무 내의 CNT 배향으로 인장강도 비보다 높게 나타났다.

Keywords

References

  1. Iijima, S., 1991, "Helical Microtubules of Graphitic Carbon," Nature, 354, pp. 56-58. https://doi.org/10.1038/354056a0
  2. Fakhru'l-Razi, A., Atieh, M. A., Girun, N., Chuah, T. G., El-Sadig, M. and Biak, D. R. A., 2006, "Effect of Multi-Wall Carbon Nanotubes on the Mechanical Properties of Natural Rubber," Composite Structures, 75, pp. 496-500. https://doi.org/10.1016/j.compstruct.2006.04.035
  3. Lau, K. T. and Micrcea, C., 2004, "On the Effective Elastic Moduli of Carbon Nanotubes for Nanocomposite Structures," Composites: Part B, 35, pp. 95-101.
  4. Lu, L., Zhai, Y., Zhang, Y., Ong, C. and Guo, S., 2008, "Reinforcement of Hydrogenated Carboxylated Nitrile Butadiene Rubber by Multi-walled Carbon Nanotubes," Applied Surface Science, 255, pp. 2162-2166. https://doi.org/10.1016/j.apsusc.2008.07.052
  5. Yang, L., Zhang, C., Pilla, S. and Gong, S., 2008, "Polybenzoxazine-Core Shell Rubber-Carbon Nanotube Nanocomposites," Composites: Part A, 39, pp. 1653-1659. https://doi.org/10.1016/j.compositesa.2008.07.004
  6. Sanjib, B., Christophe, S., Ouziyine, B., Marie-Louise, S., Sabu, T. and Jean-Paul, S., 2008, "Improving Reinforcement of Natural Rubber by Networking of Activated Carbon Nanotubes," Carbon, 46, pp. 1037-1045. https://doi.org/10.1016/j.carbon.2008.03.011
  7. Xiao, K. Q. and Zhang, L. C., 2004, "The Stress Transfer Efficiency of a Single-Walled Carbon Nanotube in Epoxy Matrix," J of Material Science, 39, pp. 4481-4486. https://doi.org/10.1023/B:JMSC.0000034141.48785.d2
  8. Baja, M., George, S. C., Gardette, J. L. and Lacoste, J., 2002, "Evaluation of Crosslinking in Elastomers Using Thermoporometry, Densimetry and Differential Scanning Calorimetry Analysis," Rubber Chem and Tech, 75, p. 143. https://doi.org/10.5254/1.3547666
  9. Sircar, A. K., Rodrigues, S. and Chartoff, R. P., 1999, "Glass Transition of Elastomers Using Thermal Analysis Techniques," Rubber Chem and Tech, 72, p. 513. https://doi.org/10.5254/1.3538816
  10. Verge, P., Peeterbroeck, S., Bonnaud, L. and Dubois, P., 2010, "Investigation on the Dispersion of Carbon Nanotubes in Nitrile Butadiene Rubber: Role of Polymer-to-Filler Grafting Reaction," Composite Science and Technology, 70, pp. 1453-1459. https://doi.org/10.1016/j.compscitech.2010.04.022
  11. Sung, J. H., Lee D. J., Ryu, S. R. and Cho, Y. S., 2010, "Mechanical Properties of Elastomeric Composites with Atmospheric Pressure Flame Plasma Treated Multi-Walled Carbon Nano Tube and Carbon Black," J. of the Korean Society of Mechanical Engineers(A), 34(9), pp. 1209-1215. https://doi.org/10.3795/KSME-A.2010.34.9.1209
  12. Sui, G., Zhong, W. H., Yang, X. P. and Yu, Y. H., 2008, "Curing Kinetics and Mechanical Behavior of Natural Rubber Reinforced with Pretreated Carbon Nanotubes," Materials Science and Engineering A, 485, pp. 524-531. https://doi.org/10.1016/j.msea.2007.09.007
  13. Pham, G. T., Park, Y. B., Liang, Z., Zhang, C. and Wang, B., 2008, "Processing and Modeling of Conductive Thermoplastic/Carbon Nanotube Films for Strain Sensing," Composites: Part B, 39, pp. 209-216. https://doi.org/10.1016/j.compositesb.2007.02.024

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