Abstract
Oxidative polymerization of N-vinylcarbazole (NVC) was achieved in an aqueous suspension by vanadium (V) ion as the oxidant. Formation of polyN-vinylcarbazole (PNVC) was confirmed by Fourier transformed infrared (FTIR) spectroscopic analyses. Scanning electron microscopic (SEM) analyses of PNVC showed distinctive morphological pattern. Thermogravimetric stability studies (TGA/DTA) revealed that PNVC underwent about 60% weight loss up to 1,000°C temperature and suggested the formation of a structure different from that of conventional PNVC homopolymer soluble in solvents. PNVC obtained from the present study of NVC-VV polymerization system was found to be intractable in nature and confirmed to be due to the formation of a cross-linked polymer structure. A possible pathway for the polymerization of NVC is via coupling of aromatic rings vis-a-vis in situ formation of cross-linked PNVC (CLPNVC) has been proposed.
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