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On acrylonitrile polymerization in the presence of zinc salts

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Abstract

Acrylonitrile polymerization photoinitiated at 365 nm by pyrene and/or azobisisobutyronitrile in the presence of zinc salts in N,N-dimethylformamide solution has been studied by the rotating sector method. It was found that the ratio of the rate constants for propagation and termination (kp/kt) increases on addition of zinc salts (chloride, nitrate, acetate). This increase was more pronounced for the azobisisobutyronitrile photoinitiated polymerization of acrylonitrile then for its pyrene photoinitiated polymerization. The results confirm the previously expressed view concerning the dual role of zinc chloride in initiation as well as in propagation steps of acrylonitrile polymerization photoinitiated by aromatic hydrocarbons.

Abstract

Полимеризация акрилонитрила, фотоинициированная пиреном при 365 нм и/или АИБН в присутствии солей цинка и в растворе N,N-диметнлформамида была исследована методом вращающегося сектора. Было найдено, гто отношение констант роста и обрыва (kp/kt) увеличивается при добавлении солей цинка (его хлорида, нитрата, ацетата). Это увеличение наиболее явно выражено для полимеризации акрилонитрила, фотоинициированной АИБН. Эти результаты подтверждают уже ранее предложенное соображение о том, что хлорид цинка принимает участие как на ступени инициирования, так и на ступени роста цепи в процессе подимеризации акрилонитрила, фотоинициированной ароматическими утлеводородами.

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References

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Authors and Affiliations

  1. Polymer Institute of the Slovak Academy of Sciences, 809 34, Bratislava, Czechoslovakia

    I. Capek & J. Barton

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  1. I. Capek
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  2. J. Barton
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Capek, I., Barton, J. On acrylonitrile polymerization in the presence of zinc salts. React Kinet Catal Lett 7, 21–25 (1977). https://doi.org/10.1007/BF02068547

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  • DOI: https://doi.org/10.1007/BF02068547

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