Polymerization of vinyl monomers photoinitiated by p-nitroaniline: Photoinitiation mechanism

Authors
Encinas, MV Rufs, AM Norambuena, E Giannotti, C
Citation
Mv. Encinas et al., Polymerization of vinyl monomers photoinitiated by p-nitroaniline: Photoinitiation mechanism, J POL SC PC, 38(12), 2000, pp. 2269-2273
Citations number
15
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN journal
0887624X → ACNP
Volume
38
Issue
12
Year of publication
2000
Pages
2269 - 2273
Database
ISI
SICI code
0887-624X(20000615)38:12<2269:POVMPB>2.0.ZU;2-5
Abstract
The polymerization rate of methyl methacrylate photoinitiated by p-nitroace tanilide in the presence of triethylamine was measured as a function of the amine concentration in different media. The polymerization is more efficie nt in nonpolar medium (benzene/monomer). ESR studies show the formation of a nitro and an amino free radical, which are formed by photoinduced proton transfer from the amine to the nitro group. The amine radical is the active species that adds to the monomer. (C) 2000 John Wiley & Sons, Inc.