1. β-Nitrostyrene Derivatives as Inhibitors of the Free Radical Polymerization
- Author
-
M. Victoria Encinas, Sergio Jimenez, Eduardo Lissi, and Ester Norambuena
- Subjects
Nitroxide mediated radical polymerization ,Polymers and Plastics ,Chemistry ,Organic Chemistry ,Radical polymerization ,Cationic polymerization ,Condensed Matter Physics ,Living free-radical polymerization ,Anionic addition polymerization ,Cobalt-mediated radical polymerization ,Polymerization ,Polymer chemistry ,Materials Chemistry ,Physical and Theoretical Chemistry ,Ionic polymerization - Abstract
The free radical polymerization of vinyl monomers is efficiently inhibited by β-nitrostyrene derivatives. The high reactivity of the growing radicals towards the β-nitro compounds is controlled by the electron-donor character of the macroradical and the electron deficiency of the double bond of the β-nitro derivative. Electron withdrawing substituents at the 4-position of β-nitrostyrene increase markedly the inhibition rate. The inhibition efficiency of β-nitrostyrene towards electron deficient monomer double bonds is strongly reduced. Polymerization rates and 1 H NMR results show that the β-nitrostyrene derivatives act as strong inhibitors of the polymerization through a mechanism that involves the release of NO 2 .
- Published
- 2001