Abstract
THE dimerization products of chloroprene have been shown to consist principally of two substituted cyclo-hexenes and an eight-membered cyclic diene1. Carothers et al.2 have noted the presence of a distinct oligomeric fraction in the polymerization products of chloroprene, and more recently Klebanskii et al.3 have shown that this fraction contains both six- and eight-membered cyclic dimers. In previous kinetic studies of the thermal polymerization of chloroprene, no special account has been taken of the formation of dimers; it has been tacitly assumed, for example, that the rate and the observed activation energy of the thermal polymerization4,5 refer to a direct polymerization of the chloroprene monomer.
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References
Cope, A. C., and Bailey, J. W., J. Amer. Chem. Soc., 70, 2305 (1948). Cope, A. C., and Schmitz, W. R., J. Amer. Chem. Soc., 72, 3056 (1950).
Carothers, W. H., Williams, I., Collins, A. M., and Kirby, J. E., J. Amer. Chem. Soc., 53, 4203 (1931).
Klebanskii, A. L., Chevychalova, K. K., and Efremova, E. M., Visok. Soed., 4, 1145 (1962).
Medvedev, S. S., Chilikina, E., and Klimenkov, V., Acta Physicochem. U.R.S.S., 11, 751 (1939).
Banbrook, A. K., Lehrle, R. S., and Robb, J. C., J. Polym. Sci., C 4, 1161 (1964).
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LEEMING, P., LEHRLE, R. & ROBB, J. Unusual Role of Dimers in Thermal Polymerization of Chloroprene. Nature 207, 403–404 (1965). https://doi.org/10.1038/207403b0
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DOI: https://doi.org/10.1038/207403b0
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