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

✍ Scribed by M. V. Encinas; A. M. Rufs; E. Norambuena; C. Giannotti

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 121 KB
Volume: 38
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(20000615)38:12<2269::aid-pola160>3.0.co;2-h

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✦ Synopsis

The polymerization rate of methyl methacrylate photoinitiated by p-nitroacetanilide in the presence of triethylamine was measured as a function of the amine concentration in different media. The polymerization is more efficient 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.

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