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Electrical Conductivity Behavior of 6FDA-based Fluorinated Polyimide/PMMA-g-MWCNT Nanocomposite Film  

Yun, Sung-Jin (School of Chemical Engineering & Materials Science, Chung-Ang University)
Im, Hyun-Gu (School of Chemical Engineering & Materials Science, Chung-Ang University)
Kim, Joo-Heon (School of Chemical Engineering & Materials Science, Chung-Ang University)
Publication Information
Polymer(Korea) / v.34, no.2, 2010 , pp. 97-103 More about this Journal
Abstract
PMMA was grafted on MWCNT surface in order to prepare conducting film composed of 6FDAbased polyimide/MWCNT. The electrical conductivity of 6FDA-based polyimide/PMMA-g-MWCNT was investigated as a function of PMMA-g-MWCNT content. Dispersion of MWCNT in 6FDA-based polyimide composite film was better than the pristine MWCNT due to the interaction force between PMMA and 6FDA-based polyimide. Electrical conductivity was interpreted by percolation threshold theory. As a result, 6FDA-6FpDA/PMMA-g-MWCNT which have high critical exponents and low critical concentration showed better dispersion than polyimide composite material that contains DABA(diamino benzoic acid).
Keywords
6FDA-based polyimide; PMMA; MWCNT; dispersty; percolation;
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