Abstract
AbstractSolution terpolymerization of styrene (St), methyl methacrylate (MMA) and acrylonitrile (AN) was carried out in dioxane at 65 ± 0.1 °C for 120 min using p‐nitrobenzyltriphenyl phosphonium ylide as radical initiator. The kinetic expression is as follows (Rp is the rate of polymerization): Rp∝ [ylide]0.45[St]0.8[MMA]1.2[AN]1.2. The overall activation energy is 42 kJ mol−1 L−1. The composition of terpolymer, calculated from 1H NMR and elemental analysis, was used to evaluate reactivity ratio, as r1 (MMA + AN) = 0.06 and r2 (St) = 0.005, employing the Kelen–Tüdos method. It confirmed the alternating nature of the terpolymer. The terpolymer was characterized using 13C NMR, gel permeation chromatography and thermogravimetric differential thermal analysis. Electron spin resonance spectroscopy confirmed the presence of the phenyl radical responsible for initiation. Copyright © 2006 Society of Chemical Industry
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