The mechanism of initiation of cationic polymerization of oxazolincs was discussed with particular stress to the application of alkyl chloroformatcs as initiators. On the example of 2-methyloxazoline and 2-phenyloxazoline polymerization initiated with methyl chloroformate it was proved that the rate constans of polymerization increase in the presence of potassium iodide or a silver salt of trifluoromethanesulphonic acid (AgOTf). Star-like polymers with Tyree branches were obtained in polymerization of the above monomers initiated with chloroformate of 2,2-bis-hydroxymethylbutanol-l in the presence of KI Or AgOTf. The method of preparation of block copolymers of oxazolincs and ethylene oxide by initiation with macro-initiators (a,w-dichloroformates of polyoxyethylene glycols) also in the presence of KI or AgOTf was described, too.
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