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Effect of the Intramolecular Chain Transfer to Polymer on PLP/SEC Experiments of Alkyl Acrylates

✍ Scribed by Gurutze Arzamendi; Christophe Plessis; José R. Leiza; José M. Asua

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
188 KB
Volume
12
Category
Article
ISSN
1022-1344

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✦ Synopsis

Abstract

Pulsed‐laser polymerization (PLP) has been adopted by IUPAC as the method of choice for the determination of propagation rate constants (k~p~). However, the method has failed in the polymerization of alkyl acrylates at temperatures above 30 °C. In this work, the PLP experiments were analyzed by simulation using a Monte Carlo algorithm. It was found that the experimental difficulties encountered to accurately determine k~p~ at temperatures above 30 °C were caused by extensive intramolecular chain transfer. This mechanism is not operative at lower temperatures because of its high activation energy.

Pulsed‐laser polymerization of BA in bulk at temperatures between −41 and +40 °C: Simulated MWD trace.

imagePulsed‐laser polymerization of BA in bulk at temperatures between −41 and +40 °C: Simulated MWD trace.

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