Abstract
The polymerization of methyl methacrylate initiated by dicyclohexyl peroxydicarbonate at 30 °C was studied in the presence of tri-n-butylboron and a series of quinones, namely, p-benzoquinone, chloranil, and 2,5-di-tert-butyl-p-benzoquinone, whose concentration changed from 0.25 to 2.00 mol.%. The initial polymerization rate and molecular weight of poly(methyl methacrylate) depend on the structure and concentration of quinone. The growth radicals react with p-benzoquinone and chloranil predominantly at the C=C bond, while they react at the C=O bond of 2,5-di-tert-butyl-p-benzoquinone. The terminal stable oxygen-centered radicals that formed react with alkylborane, terminating reaction chains and generating alkyl radicals into the bulk. The latter are involved in chain initiation.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2114–2119, October, 2004.
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Dodonov, V.A., Kuznetsova, Y.L., Lopatin, M.A. et al. Reactions of poly(methyl methacrylate) radicals with some p-quinones in the presence of tri-n-butylboron in methyl methacrylate polymerization. Russ Chem Bull 53, 2209–2214 (2004). https://doi.org/10.1007/s11172-005-0101-2
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DOI: https://doi.org/10.1007/s11172-005-0101-2