Abstract
Using carbon tetrabromide (CTB) as a telogen, the radical telomerization of methyl methacrylate (MMA) was carried out with varying temperature, molar ratio of CTB to MMA, and with or without benzene as solvent. The telomerization behavior of MMA, and structure and properties of the resulting adducts were compared with those in MMA-bromotrichloromethane (BTCM) system. The telomerization using CTB gave preferentially adducts with a lower average degree of telomerization (nĚ…) than that using BTCM. A kind of linear monoadduct (n=1), two kinds of linear diadducts (n=2), two kinds of cyclic diadducts (n=2), and two kinds of linear triadducts (n=3) were isolated, and the structures of all adducts were determined by 1H, 13C, and 2D NMR techniques. It was found that the linear diadducts from CTB show a lowering of the priority of syndiotacticity and higher extent of cyclization in comparison with the ones from BTCM.
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Kimura, T., Ezura, H. & Hamashima, M. Study on Telomerization of Methyl Methacrylate with Carbon Tetrabromide and Characteristics of the Resulting Adducts. Polym J 24, 187–197 (1992). https://doi.org/10.1295/polymj.24.187
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DOI: https://doi.org/10.1295/polymj.24.187