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Mechanism of the polymerization ofn-butyl acrylate initiated byN,N-diethyldithiocarbamate derivatives. Part 1. Photolysis of butyl-2-(N,N-diethyldithiocarbamyl)propionate and oligomerization of butyl acrylate

✍ Scribed by Manga, J. Dika; Polton, A.; Tardi, M.; Sigwalt, P.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
344 KB
Volume
45
Category
Article
ISSN
0959-8103

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✦ Synopsis

The photolysis of n-butyl-(N,N-diethyl dithiocarbamyl)propionate (RTC), an initiator for "livingÏ free radical polymerizations, has been investigated in order to elucidate the mechanism of these polymerizations. The photolysis yields tetraethylthiuram disulphide (TED), and its degradation products, butyl acrylate, butyl propionate and head-to-head dimer of butyl acrylate. These compounds result from reactions following the homolytic bond breaking of the carbonÈsulphur bond of RTC, and correspond to termination reactions in the case of a polymerization. However, a functionalized head-to-tail dimer of butyl acrylate is also formed. Photolysis of RTC in the presence of a small amount of butyl acrylate, which mimics a polymerization process, leads mainly to the formation of functionalized oligomers of butyl acrylate. The change of the concentrations of these compounds with reaction time is an argument in favour of a possible reactivation of the functionalized oligomers.

1998 SCI.

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