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Mechanism of anionic polymerization of (meth)acrylates in the presence of aluminium alkyls, 2. Kinetic investigations with methyl methacrylate in toluene

✍ Scribed by Helmut Schlaad; Axel H. E. Müller

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
366 KB
Volume
16
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

The kinetics of the polymerization of methyl methacrylate initiated by lithium alkyls (tert‐butyllithium or ethyl α‐lithiobutyrate) was investigated in the presence of aluminium alkyls (triethylaluminium or triisobutylaluminium) in toluene at −78°C. The rate of polymerization decreases considerably once the living dimer is formed. This suggests that the aluminate end‐group coordinates with the penultimate ester group of the polymer chain, thus decreasing reactivity. The results are at variance with an activated monomer mechanism.

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