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Dispersity and Electro-Conductivity of PU Grafted MWCNT/PU Composite via Simple Blending Method  

Yun, Sung-Jin (Department of Chemical Engineering, Chungang University)
Im, Hyun-Gu (Department of Chemical Engineering, Chungang University)
Kim, Joo-Heon (Department of Chemical Engineering, Chungang University)
Publication Information
Applied Chemistry for Engineering / v.21, no.5, 2010 , pp. 500-504 More about this Journal
Abstract
The PU-g-MWNTs/PU film was synthesized by simple blending method to fabricate composites which have excellent mechanical and electrical properties. PU-g-MWNTs based composite revealed much enhanced dispersity than pristine MWNTs composite because of interfacial interaction related with interfacial compatibility between polymer matrix and PU on the MWNTs surface. The electro-conductivity of composite was measured as a function of PU-g-MWNTs concentration. The results were correlated with percolation threshold theory. As a result, the critical concentration and exponent of electro-conductivity behavior was equal to 0.78 wt% and 0.945.
Keywords
polyurethane; CNT; dispersion; electro-conductivity;
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