Abstract
1,2,3,4-Tetraphenylcyclopentadiene triphenyl stibonium ylide initiated radical polymerization of N-vinyl pyrrolidone (N-VP) in dioxane, at 60±0.2°C, for 60 min under nitrogen atmosphere has been carried out. The system follows ideal kinetics, i.e., R p ∝ [ylide]0.5 [N-VP]1.0. The values of k 2 p/k t and overall energy of activation have been computed as 0.5 × 10−2 lmol−1s−1 and 33 kJ/mol, respectively. The FT-IR spectrum shows a band at 1692 cm−1 due to the =C=O group of N-vinyl pyrrolidone. The 1H-NMR spectrum shows multiplet at 2.4 δ ppm and a doublet at 3.7 δ ppm due to CH2 protons. The DSC curve shows a glass transition temperature (T g) as 48°C. The presence of six hyperfine lines in the ESR spectrum indicates that the system follows free radical polymerization and the initiation is brought about by phenyl radical.
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