Ring-opening polymerization of cyclic ethers

摘要

A method for preparing ester end-capped polyalkylene ether is disclosed. Cyclic ether monomers are subjected to ring-opening polymerzation at a temperature of 20 DEG -80 DEG C. and a pressure of 0-10 atm in the presence of a solid acid serving as catalyst and a mixture of acid and acid anhydride serving as a promoter. The solid acid is an oxide of group III and group IV elements and has been modified by sulfuric acid, ammonium sulfate or ammonium sulfite.