Abstract
In the field of cationic polymerization a notoriously intractable problem is the mechanism of initiation by aluminium halides. Despite much work on the polymerization itself, there are few studies of the initiation mechanism. Existing theories are shown to be inadequate to explain the most characteristic features of the reactions: when a solution of an aluminium halide in an alkyl halide is introduced into a solution of isobutene, there ensues a fast polymerization which generally stops at incomplete conversion, and the number of moles of polymer formed is much smaller than the number of moles of initiator; these features are found over a very wide range of conditions,
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