Polymerization of cyclic ethers using heterogeneous catalysts

摘要

Cyclic ethers are polymerized by contacting one or more oxiranes, oxetanes, tetrahydrofurans, oxepanes, 1,3-dioxolanes, or 1,3,5-trioxanes; with a heterogeneous catalyst containing a metal perfluoroalkylsulfonate attached to the surface of the catalyst, and an accelerator selected from the group consisting of carboxylic anhydrides, acyl halides, and carboxylic acids whose pKa in water is less than 6. The metal may be strontium, barium, scandium, yttrium, the rare earth metals, titanium, zirconium, hafnium, vanadium, niobium, chromium, molybdenum, tungsten, tantalum, rhenium, iron, ruthenium, osmium, rhodium, iridium, palladium, copper, platinum, silver, gold, zinc, cadmium, mercury, aluminum, gallium, indium, thulium, germanium, tin, lead, arsenic, antimony, mischmetall or bismuth.