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Electrical Properties and Characterization of 3-Methylthiophene Impregnated Polyurethane films  

Choi, Sei-Young (Department of Chemistry, Cheongju University)
Choi, Kyo-Chang (Department of Chemistry, Cheongju University)
Lee, Eun-Kyoung (Department of Chemistry, Cheongju University)
Publication Information
Elastomers and Composites / v.39, no.3, 2004 , pp. 234-243 More about this Journal
Abstract
The elastomeric and conductive polyurethane (PU) films were prepared by poly(propylene glycol) (PPG), toluene 2,4-diisocyanate, 3-methylthiophene (3-MT) at various preparation conditions, such as the reaction time, the $FeCl_3$ concentration, the weight ratio of the 3-MT to PU and the reaction temperature for the diffusion-oxidative reaction. The conductive poly (3-methylthiophene) (PMT) layers via the diffusion-oxidative reaction of 3-MT and ferric chloride were formed by immersing the film in organic solution of $FeCl_3$/ethyl acetate. The preparation conditions greatly affected the electrical conductivity of the 3-MT/PU composite. The effects of the reaction time and temperature on morphology and surface free energy were investigated by scanning electron microscopy (SEM) analysis and contact angle measurement, respectively. The conductivity of the composite was as high as 42 S/cm.
Keywords
conductive polyurethane; diffusion-oxidative reaction; electrical conductivity;
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