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Evidence of Branching in Poly(butyl acrylate) Produced in Pulsed-Laser Polymerization Experiments

✍ Scribed by Christophe Plessis; Gurutze Arzamendi; Juan M. Alberdi; Alex M. van Herk; José R. Leiza; José M. Asua

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
85 KB
Volume
24
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Branched poly(butyl acrylate) was obtained from pulsed‐laser polymerizations carried out in bulk and in solution between −16 and 60 °C. The predominantly short branches are formed by backbiting. The Arrhenius temperature dependence of the backbiting rate is calculated, and the activation energy of this process was found to be remarkably higher than that of propagation. Branching thus increases with temperature leading to broader SEC traces and difficulties in the accurate determination of k~p~.

Arrhenius plot of k~fp2~ versus 1/T determined experimentally.

magnified imageArrhenius plot of k~fp2~ versus 1/T determined experimentally.

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