Journal article

E.S.R. Spectra of free radicals relevant to methacrylate polymerization

H Hong Keah, ID Rae

Australian Journal of Chemistry | Published : 1992

Abstract

Carbon-based free radicals were generated by thermal cleavage of the tetraester Me2C(COOME)-CH2-CMe(COOMe)- CMe (COOMe)-CH2-C(COOMe)Me2 which is a model for head-to-head units in a poly(methyl methacrylate) chain. The resulting electron spin resonance spectrum had higher resolution than the ‘nine-line’ spectrum previously reported; this enabled identification of the component radicals. In the present case, the spectrum was well matched by a summation of spectra of the Me2C(COOME)-CH2-CMe(COOMe) radical and the 1-methoxycarbonyl-1-methylethyl radical Me2-C-COOMe derived from it by loss of methyl methacrylate. Both of these radicals were generated in separate experiments. Radicals were also ge..

View full abstract

University of Melbourne Researchers

Citation metrics