Abstract
Abstract Bulk polymerization of tetrahydrofuran was studied to find a facile method for the preparation of polytetramethyleneglycol having molecular weight more than 1000 initiated by fuming sulfuric acid as a main component at -5 to 0°C. Superacid salts, being soluble in tetrahydrofuran, showed excellent activity for increasing the molecular weight. The polymerization initiated by fuming sulfuric acid in combination with sodium trifluoromethane sulfonate was examined under several conditions. It was also found that a mixture of fuming sulfuric acid and an aromatic compound such as benzenesulfonic acid, benzene, and xylene, contributed to an increase in the molecular weight of polymer.
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