Summary
To determine the major chain transfer site of vinyl acetate in emulsion polymerization, two deuterated vinyl acetates, vinyl trideuteroacetate and trideuterovinyl acetate were synthesized, polymerized both in bulk and emulsion and each compared with undeuterated vinyl acetate. The polymer molecular weights and polymerization rates of the three were determined under identical conditions. The major chain transfer site was found to be on the vinyl hydrogens of vinyl acetate (94%). The overall isotope effect of chain transfer to vinyl acetate was found to be 3.0. The major termination step in bulk polymerization was found to be the reaction of monomer radical with growing radicals.
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Litt, M.H., Chang, K.H.S. (1981). The Reinvestigation of Vinyl Acetate Emulsion Polymerization (III) - Isotope Effect. In: El-Aasser, M.S., Vanderhoff, J.W. (eds) Emulsion Polymerization of Vinyl Acetate. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8114-0_8
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DOI: https://doi.org/10.1007/978-94-009-8114-0_8
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