Abstract
AbstractSolution 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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