| 초록 |
We have developed a useful method to control the molecular weight of poly(ethylene oxide) by n-butyllithium (n-BuLi)-initiated ring-opening polymerization of ethylene oxide (EO) with tert-butoxide (t-BuOK) in the mixtue of benzene/DMSO at 35℃ for 48h. In addition, an alkoxide bearing sodium or potassium counterion is well known to initiate ethylene oxide leading to living polymerization in THF. In this study, 3-azidopropanol could be readily synthesized by the reaction of 3-chloropropanol with NaN3 at 80℃ for 24h. The yield was over 95 mol %. It was converted to the corresponding sodium alkoxide in THF using sodium metal, followed by polymerization of ethylene oxide at room temperature for 48h. After complete polymerization, trimellitic anhydride chloride was delivered into the reactor via a breakseal technique under high vacuum. The anhydride functionalization yield was over 95 mol %. In this presentation, we will discuss the preliminary results. |
