Characterization of PMMA/MWNT Composites Fabricated by a Twin Screw Extruder

이축 압출기를 이용하여 제조된 PMMA/MWNT 복합체의 특성 분석

  • Woo, Jong-Seok (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Lee, Geon-Woong (Korea Electrotechnology Research Institute) ;
  • Kye, Hyoung-San (Department of Materials and Design, Mokwon University) ;
  • Shin, Kyung-Chul (Department of Polymer Science and Engineering, Chungju National University) ;
  • Bang, Dae-Suk (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
  • 우종석 (금오공과대학교 고분자공학과) ;
  • 이건웅 (한국전기연구원 CNT전극전문연구랩) ;
  • 계형산 (목원대학교 디자인소재학과) ;
  • 신경철 (국립충주대학교 나노고분자공학과) ;
  • 방대석 (금오공과대학교 고분자공학과)
  • Published : 2007.09.29

Abstract

MWNTs have been widely investigated due to unique properties of such as good electrical conductivity and thermal stability in polymer composites industries. This paper established the procedure to fabricate PMMA/MWNT composites by a modular intermeshing co-rotating twin screw extruder with L/D ratio of 42. The electrical properties of PMMA/MWNT composites with different content of MWNT have been investigated. A sheet resistance percolation was observed at 4 wt% of MWNT for the melt processed composites. Sheet resistance of PMMA/MWNT composite film containing 4 wt% of MWNT was nearby $10^4{\Omega}/sq$ and this shows the possibility of potential application to EMI (Electronic Magnetic Interference) shielding materials. The characteristics of composites were analyzed by TGA, DSC, and SEM. In addition, MFI (Melt Flow Index) has been measured to analyze the rheological property.

References

  1. S. Ijima, 'Helical Microtubules of Graphitic Carbon', Nature, 354, 56 (1991) https://doi.org/10.1038/354056a0
  2. G. Che, B. Lakshmi, E. R. Fisher, and R. C. Martin, 'Carbon Nanotube Membranes for Electrochemical Energy Storage and Production', Nature, 393, 346 (1998) https://doi.org/10.1038/30694
  3. B. Gao, A. Kelinhammes, X. P. Tang, C. Bower, Y. Wu, and O. Zhou, 'Electrochemical Interaction of Single-Walled Carbon Nanotubes with Lithium', Chem. Phys. Lett., 307(3-4), 153 (1999) https://doi.org/10.1016/S0009-2614(99)00486-8
  4. C. M. Aguirre, S. Auvray, S. Pigeon, R. Izquierdo, R. Izquierdo, P. Desjardins, and R. Martel, 'Carbon nanotube Sheets as Electrodes in Organic Lightemitting Diodes', Appl. Phys. Lett., 88, 183104 (2006) https://doi.org/10.1063/1.2199461
  5. Q. Cao, S.-H. Hur, Z.-T. Zhu, Y. Sun, C. Wang, M. A. Meitl, M. Shim, and J. A. Rogers 'Highly Blendable, Transparent Thin-Film Transistors That Use Carbon-Nanotube-Based Conductors and Semiconductors with Elastomeric Dielectrics', Adv. Mater., 18, 304 (2006) https://doi.org/10.1002/adma.200501740
  6. S. J. Park, K. S. Cho, and S. H. Kim, 'A Study on Dielectric Characteristics of Fluorinated Polyimide Thin Film', J. Colloid Interface Sci., 272(2), 384 (2004) https://doi.org/10.1016/j.jcis.2003.12.027
  7. K. S. An, J. S. Kim, C. O. Kim, and J. P. Hong, 'Non-Reactive Treatment of Multiwall Carbon Nanotube with Inert Argon Plasma for Enhanced Field Emission', Carbon, 41(13), 2481 (2003) https://doi.org/10.1016/S0008-6223(03)00294-X
  8. Y. Zou, Y. Feng, L. Wang, and X. Liu, 'Processing and Properties of MWNT/HDPE Composites', Carbon, 42(2), 271 (2005) https://doi.org/10.1016/j.carbon.2003.10.028