Journal of Fluorine Chemistry p. 129 - 138 (2015)
Update date:2022-08-11
Topics:
Li, Lingling
Li, Ying
Wang, Xia
Qi, Yuanchun
Hu, Jiaojiao
Fang, Zhou
Dong, Qingzhi
A novel fluorinated polyether glycol with fluorinated side chains is synthesized via "living/controlled" cationic ring-opening polymerization of tetrahydrofuran and fluorine-containing epoxy compounds (FO). The effects of polymerization conditions on monomer conversion, number-average molecular weight (Mn), molecular weight distribution (Mw/Mn) are measured. Our investigations have shown that the use of a mixed solvent (dichloromethane/1,4-dioxane) can prevent intra- and intermolecular transfer reactions, due to more nucleophilic oxygen atom in 1,4-dioxane. Using BF3·CH3OH/CH2OHCH2OH as initiation system, polymers with predictable number-average molecular weight, narrow molecular weight distribution (1.03 < Mw/Mn < 1.08) were produced. On the basis of the reactivity ratio of FO/THF and monomer conversion, a mechanism of living/controlled polymerization has been proposed.
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