Abstract
Abstract The polymerization in the system acrylonitrile (AN) - tributyl dimagnesium iodide (TUI) - toluene in the presence of small amounts of 2-vinylpyridine (VP) begins with the formation of short living oligo-blocks of VP which induce the polymerization of AN, The corresponding AN-growing chains undergo a peculiar deactivation consisting in the interaction with the pyridine rings of the VP-oligo-blocks. The repeated acts of this type lead to the formation of high molecular weight branched copolymers.
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