| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 봄 (04/12 ~ 04/13, 대전컨벤션센터) |
| 권호 |
37권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Sodium alkoxide-initiated polymerizations of L-lactide |
| 초록 |
An alkoxide having sodium or potassium counter ion is well known to initiate ethylene oxide leading to living polymerization in polar solvent. In this study, 3-AzPOH could be readily synthesized by the reaction of 3-chloropropanol with NaN3 at 80℃. The yield was over 95 mol%. It was converted to the corresponding sodium alkoxide in THF using Na metal under high vacuum, followed by polymerization of ethylene oxide at room temperature in the mixture of benzene and DMSO for 48h. After complete polymerization, Sodium alkoxide-initiated polymerizations of L-lactide were conducted in toluene at 50 "C. These Sodium alkoxides initiate the polymerization via nucleophilic attack, forming alkyl ester end-groups as evidenced by 'H NMR spectroscopy. High yields, high molecular weights and a relatively high optical purity (up to 95%) of the isolated poly(L4actide) may be obtained. |
| 저자 |
이재혁, 최우석, 권난현, 김형철, 김윤, 양세라, 김정안, 강호정, 이재열, 시디크 아부바카
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| 소속 |
경희대 |
| 키워드 |
L-lactide; azido
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| E-Mail |
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