Chromatography Research Today is a free monthly online journal that collates and summarizes the latest research about Chromatography, including details on column chromatography, gas chromatography (gc), liquid chromatograpy, hplc.

Surface and thermodynamic characterization of conducting polymers by inverse gas chromatography II. Polyaniline and its blend.

Wu R, Que D, Al-Saigh ZY

Department of Chemistry, State University of New York, College at Buffalo, 1300 Elmwood Avenue, Buffalo, NY 14222, USA.

Inverse gas chromatography was used to characterize both doped, the undoped polyaniline (PANI), and its blend with nylon-6 using 27 solutes. The change in the morphology of these polymers was detected between 80 and 180 degrees C and was complemented by the degree of crystallinity. Delta H1(s)values of all solutes - pure polymers were found endothermic and exothermic for the blend. The X'23 depended on the chemical nature of solutes; a correction measure was not successful in obtaining the true values of X'23. X'23 showed a phase separation of the blend (60:40 w/w) between 80 and 180 degrees C. Blending nylon-6 with PANI has lowered the dispersive surface energy of PANI while increasing the surface energy of nylon-6.

Published 12 March 2007 in J Chromatogr A, 1146(1): 93-102.
Full-text of this article is available online (may require subscription).

© 2005-2008 Chromatography Research Today. All Rights Reserved.