Abstract
The example of methanesulfonyl halides has shown the possibility of initiating cationic polymerization of 2-oxazolines by alkylsulfonic acid halides. Chain propagation rate constants and activation energy of the processes have been determined. The kinetic mechanisms suggest a slow initiation of polymerization followed by fast chain propagation. It has been shown that the polymerization of 2-ethyl-2-oxazoline initiated by aliphatic sulfonyl halides proceeds predominantly at the active centers of the ionic type. The synthesis of oligo(3-sulfonyl)methacrylate-graft-poly(2-isopropyl-2-oxazoline) is described as an example of using alkylsulfonyl halides for graft copolymers.
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