| Abstract: | The influence of γ-butyrolactone (γ-BL), used as solvent of BF3-amine complexes, on the polymerization of monoepoxides was studied. Different intermediate reaction products of PGE initiated by BF3-4-methoxyaniline (BF3-4MA) previously solubilized in γ-BL (55% by weight), were separated and analyzed by 1H-NMR. It is shown that there is the opening of both epoxy and γ-BL. The latter does not homopolymerize, but copolymerizes well with epoxy groups. The use of a large quantity of γ-BL leads to a decreasing molar mass of the formed polymer. The kinetic study allowed to propose the mechanism of the cationic polymerization of epoxy initiated by BF3-amine complex in the presence of γ-BL. © 1994 John Wiley & Sons, Inc. |
