Abstract
The unusually high rates of polymerization of isopropyl vinyl ether initiated in bulk by high energy radiation, compared with other vinyl ethers, reported previously have been confirmed. The rates, molecular weights and heats of polymerization initiated by triphenylmethyl hexachlorantimonate have now been measured in methylene dichloride solution. Both methods of initiation are believed to involve essentially free ions. The chemically initiated polymerization rates however were similar to those found with the other vinyl ethers. The conflicting results are explained in terms of solvation effects rather than to differences in the methods of initiation. Qualitatively these results have been interpreted in terms of the Eyring theory of reaction rates between an unpaired ion and a neutral molecule.
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