| 학회 | 한국화학공학회 |
| 학술대회 | 2014년 봄 (04/23 ~ 04/25, 창원컨벤션센터) |
| 권호 | 20권 1호, p.64 |
| 발표분야 | 고분자 |
| 제목 | Preparation of PLLA with high-molecular weight using Sn(Oct)2 and ZnO as a co-catalyst under the bulk condition |
| 초록 | Poly(L-lactic acid) (PLLA) has attracted as biomedical applications such as surgical implants, drug delivery systems, and ecological materials due to biocompatible, biodegradable characters, and semi-crystalline structure. PLLA has usually been synthesized by bulk polymerization of L-lactide with appropriate catalyst like tin compounds, SnCl4 or Sn(Oct)2 which known to be the most effective catalysts. However, there are not many studies of the effect of co-catalysts in polymerization of PLLA. In this study, PLLAs having high molecular weights were synthesized by bulk ring-opening polymerization of L-lactide with the various ratios of catalysts, stannous octoate (Sn(Oct)2) and zinc oxide (ZnO). This study is the first case to control the molecular weight of PLLA by varying the ratio of Sn(Oct)2 and ZnO. As ZnO is added for co-catalyst, it is effective for growing chains of PLLA and preventing back-bite reaction in the overall conditions. As a result, this study shows a significant effect of ZnO as a co-catalyst on the molecular weight of PLLA. |
| 저자 | 유지수1, 민진욱1, 홍현기2, 이종찬2, 차상호1 |
| 소속 | 1경기대, 2서울대 |
| 키워드 | Ring opening polymerization; Polylactic acid |
| 원문파일 | 초록 보기 |
