Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5188984 | Polymer | 2006 | 9 Pages |
Abstract
This work shows the spectroscopic characterization of polyaniline-montmorillonite clay (PANI-MMT) composites prepared by polymerization of aniline in aqueous suspensions of montmorillonite clay and camphorsulfonic acid containing persulfate ions as oxidizing agent. X-ray diffraction, scanning electron microscopy, and X-ray absorption near Silicon K-edge data show that morphologies and structures of PANI-MMT nanocomposites depend on their relative amount. The electrical conductivity values of composites increase from 10â4 to 10â1Â S/cmâ1 when PANI-MMT ratio increases, and percolation threshold is observed when polymer/clay mass ratio is changed. Resonance Raman, UV-VIS-NIR spectroscopy, electron spin resonance (EPR) and X-ray absorption near Nitrogen K-edge data confirm that PANI has emeraldine salt form for all PANI-MMT materials prepared.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Gustavo M. do Nascimento, Vera R.L. Constantino, Richard Landers, Marcia L.A. Temperini,