Polymerization of several epoxides and their copolymerization with tetrahydrofuran have been studied. The polymerizations were carried out by use of BF3·O(C2H5)2 as catalyst in the presence of 1,4‐butanediol. Variations of catalyst and 1,4‐butanediol ratio and concentration affect polymerization rate, molecular weight, and the formation of cyclic oligomers. The latter is also influenced by monomer fed ratio in the case of the copolymerizations. These effects are discussed, and some observations are made concerning the mechanism, particularly with respect to the role of the 1,4‐butanediol. Mayo‐Lewis monomer reactivity ratios were determined. The ratios found differed from previously published figures.
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Hammond et al. (1971) studied this question.
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