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

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)
Publication Information
Elastomers and Composites / v.42, no.3, 2007 , pp. 151-158 More about this Journal
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.
Keywords
MWNT; PMMA; electrical conductivity; modular intermeshing co-rotating twin screw extruder; EMI (Electronic Magnetic Interference);
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