Abstract
After room temperature doping of poly( N-vinylcarbazole) by iodine, the powders were annealed at different temperatures (370, 400, 470 and 570 K) for 24 h under vacuum or under iodine pressure. The powders obtained were studied by differential thermal analysis (DTA), gravimetric thermal analysis (GTA), infrared absorption (IR) and X-ray photoelectron spectroscopy (XPS). It is shown that in each powder there is only 3 at.% of iodine. The results have also shown that at low annealing temperature, the glass transition temperature decreases while the weight loss increases, which can be attributed to short chain length. After annealing at 570 K the weight loss decreases but the IR spectrum is strongly affected. This change is attributed to polymer degradation during annealing under iodine pressure.
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