The commercial hydroxyl group terminated polytetramethylene glycol （PTMG）is prepared by the cationic ring-opening polymerization of tetrahydrofuran （THF）by using a strong protonic acid initiator system such as fum...The commercial hydroxyl group terminated polytetramethylene glycol （PTMG）is prepared by the cationic ring-opening polymerization of tetrahydrofuran （THF）by using a strong protonic acid initiator system such as fuming sulfuric acid and others. There has been considerable interest in the low-corrosive BF<sub>3</sub> initiator system. However, the展开更多
文摘The commercial hydroxyl group terminated polytetramethylene glycol （PTMG）is prepared by the cationic ring-opening polymerization of tetrahydrofuran （THF）by using a strong protonic acid initiator system such as fuming sulfuric acid and others. There has been considerable interest in the low-corrosive BF<sub>3</sub> initiator system. However, the
