Y. Miwa, H. Tsutsumi, T. Oishi
Aug 1, 2001
Citations
0
Influential Citations
20
Citations
Journal
Polymer Journal
Abstract
New bis-oxetanes with oligo-ethylene oxide chain, 1,9-bis(3-ethyl-3-oxetanyl)-2,5,8-trioxanon\-ane, 1,12-bis(3-ethyl-3-oxetanyl)-2,5,8,11-tetraoxadodecane, and 1,15-bis(3-ethyl-3-oxetanyl)-2,5,8,11,14-hexaoxap\-entadecane were prepared from 3-ethyl-3-hydroxymethyloxetane and di-, tri-, or tetra-ethylene glycol. Cationic ring-opening polymerization of bis-oxetanes with initiators based on various lithium salts such as LIBF4, LiPF6, LiN(CF3SO2)2, and LiN(C2F5SO2)2 was investigated by FT-IR spectroscopy. Addition of lithium salts to the bis-oxetanes induced rapid and uncontrollable polymerization. Addition of polar solvents such as acetone, acetonitrile to the mixture containing the bis-oxetanes and lithium salts forbade polymerization. Removing the polar solvent from the mixture initiated polymerization and provided poly(oxetane)-lithium salt complexes that can be applied to solid polymer electrolytes. The kind of polar solvent and lithium salt and length of the ethylene oxide chains in the bis-oxetanes influenced reaction rates of the bis-oxetanes and crystallinities of the resulting poly(oxetane)-lithium salt complexes.