Abstract
Photopolymerization of methyl methacrylate (MMA) with N-benzylpyridinium bromide (BPB) was investigated in three different solvents, methanol, acetonitrile and methylene chloride. Electronic spectra and electric conductivity were also measured in the polymerization systems. The results indicated that BPB existed in an equilibrium among free ions, an ion pair, and CT complex in the polymerization system, and that the equilibrium shifted to the free ions in polar solvent and to the CT complex in a less polar solvent. Kinetic studies of the photopolymerization of MMA with BPB suggest that this is probably initiated by a bromine atom formed by the photodecomposition of the CT complex of BPB. In methylene chloride the photopolymerization of MMA with BPB yielded an oligomer (OMMA, Mn=650). The structural analysis of the OMMA showed that it had both a bromine atom and a dihydropyridine group per each molecule.
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Tabuchi, K., Sakota, N. Photopolymerization of Methyl Methacrylate with N-Benzylpyridinium Bromide. Polym J 15, 57–64 (1983). https://doi.org/10.1295/polymj.15.57
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DOI: https://doi.org/10.1295/polymj.15.57