The Nitroxides in Polymerization

1
The Nitroxides in Polymerization Gilles OLIVE,
Christianne Göttgens, Wilfred Smulders, Michael
MONTEIRO
Aim and Principle
The aim is to control the radical
polymerization. The principle is the use of a
reversible coupling between the nitroxide and
the growing polymeric chain.
How to synthesize them ?
? By oxidation of a secondary amine that a no
hydrogen on the carbon close to the nitrogen
? Addition of a radical or a Grignard on a
nitrone
? Spin-trapping of a radical on a nitroso
What can we change ?
? The functionality (different groups)
? The type (linear, cyclic)
? The structure (skeleton different)
Explanation ?
According to Hans Fisher1, by a kinetics analysis
of living polymerization initiated and
controlled by reactions involving persistent
radicals. By this analysis, it was found that a
simple self-regulation operates which is known as
the persistent radical effect in the other areas
of radical chemistry. 1 H. Fisher,
Macromolecules, 1997, 30, 5666-5672.