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Kinetics of Benzoyloxy Radical Transfer by Polyethylene

R. Rado, J. Potoček, and V. Ďurďovič

Institute of Polymers, Slovak Academy of Sciences, Bratislava

 

Abstract: By quantitative determination of the products of thermal decomposition of benzoyl peroxide over the temperature range 70 —90°C, using the method of competition reactions, temperature dependences of rate constants ratio of benzoyloxy radical transfer and its fragmentation in high density polyethylene and in its low-molecular model (n-heptane) have been determined. The results obtained suggest that the radical transfer reaction proceeds within the overall temperature range at a higher rate in polyethylene than in n-heptane. On the basis of the determined values of activation energies as well as of the preexponential terms of the corresponding Arrhenius equations the character of the influence of polymer hydrocarbon medium on the kinetics of its substitution reaction with oxyradicals is evaluated.

Full paper in Portable Document Format: 265a421.pdf (in Slovak)

 

Chemical Papers 26 (5) 421–425 (1972)

Tuesday, June 18, 2024

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