Polymerization of tetrahydrofuran(THF) initiated by phosphotungstic acid was carried out in the presence of epichlorohydrin(ECH). The effect of ECH content, reaction time, and water content on the polymerization have ...Polymerization of tetrahydrofuran(THF) initiated by phosphotungstic acid was carried out in the presence of epichlorohydrin(ECH). The effect of ECH content, reaction time, and water content on the polymerization have been studied. The result shows that water was the main factor influencing the yield and relative molecular weight of the polymer. Another factor was the reaction time. The ECH content mainly affects the rate of the reaction. The light irradiation mainly affects the color of the polymer. Polytetrfuran with relative molecular weight of 2 000 was obtained in yield of 73 6% at reaction condition of 0 ℃, 4 h, n (H 2 O)∶ n (PWA)= 16 2∶1.展开更多
文摘Polymerization of tetrahydrofuran(THF) initiated by phosphotungstic acid was carried out in the presence of epichlorohydrin(ECH). The effect of ECH content, reaction time, and water content on the polymerization have been studied. The result shows that water was the main factor influencing the yield and relative molecular weight of the polymer. Another factor was the reaction time. The ECH content mainly affects the rate of the reaction. The light irradiation mainly affects the color of the polymer. Polytetrfuran with relative molecular weight of 2 000 was obtained in yield of 73 6% at reaction condition of 0 ℃, 4 h, n (H 2 O)∶ n (PWA)= 16 2∶1.
