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- W2019085441 abstract "Abstract An Erratum has been published for this article in J. Polym. Sci. Part A: Polym. Chem. (2004) 42(21) 5559 . The initiator efficiency, f , of 2,2′‐azobis(isobutyronitrile) (AIBN) in dodecyl acrylate (DA) bulk free‐radical polymerizations has been determined over a wide range of monomer conversion in high‐molecular‐weight regimes ( M n ≅ 10 6 g mol −1 [≅ 4160 units of DA)] with time‐dependent conversion data obtained via online Fourier transform near infrared spectroscopy (FTNIR) at 60 °C. In addition, the required initiator decomposition rate coefficient, k d , was determined via online UV spectrometry and was found to be 8.4 · 10 −6 s −1 (±0.5 · 10 −6 s −1 ) in dodecane, n ‐butyl acetate, and n ‐dodecyl acetate at 60 °C. The initiator efficiency at low monomer conversions is relatively low ( f = 0.13) and decreases with increasing monomer to polymer conversions. The evolution of f with monomer conversion (in high‐molecular‐weight regimes), x , at 60 °C can be summarized by the following functionality: f 60 °C ( x ) = 0.13–0.22 · x + 0.25 · x 2 (for x ≤ 0.45). The reported efficiency data are believed to have an error of >50%. The ratio of the initiator efficiency and the average termination rate coefficient, 〈 k t ±, ( f /〈 k t 〉) has been determined at various molecular weights for the generated poly dodecyl acrylate ( M n = 1900 g mol −1 (≅ 8 units of DA) up to M n = 36,500 g mol −1 (≅ 152 units of DA). The ( f /〈 k t 〉) data may be indicative of a chain length‐dependent termination rate coefficient decreasing with (average) chain length. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 5170–5179, 2004" @default.
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- W2019085441 date "2004-09-09" @default.
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- W2019085441 title "Initiator efficiency of 2,2?-azobis(isobutyronitrile) in bulk dodecyl acrylate free-radical polymerizations over a wide conversion and molecular weight range" @default.
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- W2019085441 doi "https://doi.org/10.1002/pola.20322" @default.
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