Diphenylselenonium 2,3,4,5-tetraphenylcyclopentadienylide-initiated polymerization of styrene and acrylonitrile: Synthesis, characterization, reactivity ratios, and thermal properties
Anamika Singh
Analytical Research Laboratory, Department of Chemistry, Harcourt Butler Technological Institute, Kanpur 208002, India
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Department of Chemistry, Christ Church College, Kanpur 208001, India
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D. K. Singh
Analytical Research Laboratory, Department of Chemistry, Harcourt Butler Technological Institute, Kanpur 208002, India
Analytical Research Laboratory, Department of Chemistry, Harcourt Butler Technological Institute, Kanpur 208002, India===Search for more papers by this authorAnamika Singh
Analytical Research Laboratory, Department of Chemistry, Harcourt Butler Technological Institute, Kanpur 208002, India
Search for more papers by this authorMeet Kamal
Department of Chemistry, Christ Church College, Kanpur 208001, India
Search for more papers by this authorCorresponding Author
D. K. Singh
Analytical Research Laboratory, Department of Chemistry, Harcourt Butler Technological Institute, Kanpur 208002, India
Analytical Research Laboratory, Department of Chemistry, Harcourt Butler Technological Institute, Kanpur 208002, India===Search for more papers by this authorAbstract
Solution copolymerization of styrene (Sty) and acrylonitrile (AN) was carried out in dioxane at 60 ± 1°C for 90 min using diphenylselenonium 2,3,4,5-tetraphenylcyclopentadienylide (selenonium ylide) as radical initiator. The kinetic expression is as follows: Rp ∼ [Ylide]0.5 [Sty]1.0 [AN]1.0. The overall activation energy is 28.72 kJ mol−1. The composition of copolymer calculated from 1H-NMR and elemental analysis was used to evaluate reactivity ratio as r1 (Sty) = 0.351 and r2 (AN) = 0.0185, using kelen-Tudos method. It confirmed the alternating nature of the copolymer. The copolymer was characterized using Fourier transform infrared (FTIR) spectroscopy, 1H-NMR, 13C-NMR, differential scanning calorimetry, and thermal gravimetric analysis. Electron spin resonance spectroscopy confirmed the presence of the phenyl radical responsible for initiation. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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