| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
의료용 고분자 부문위원회 |
| 제목 |
Ring-Opening Polymerization of ε-Caprolactone by Poly(propyleneglycol) by an Monomer Activator |
| 초록 |
Here, we describe the ring-opening polymerization of ε-caprolactone (CL) using polypropylene glycol (PPG) as an initiator to synthesize triblock copolymers consisted of PPG and poly(ε-caprolactone) (PCL). Polymerization time or the feed ratio of CL to PPG in the presence of HCl · Et2O in CH2Cl2 at 25oC affected a degree of CL conversion. The molecular weight of PCL increased linearly. The PCLs obtained had molecular weights similar to the theoretical values calculated from the CL:PPG molar ratios. The apparent rate constant (kapp) for the polymerization of CL activated by HCl · Et2O was greatly affected by the ratio of HCl · Et2O/PPG. The activation energy for the polymerization of CL in this system was estimated to be 49.8 kJ/mol K. We successfully prepared PPG and PCL triblock copolymers using this activated monomer mechanism. |
| 저자 |
손진수1, 오재민2, 이상효1, 김재일3, 권두연3, 이봉3, 강길선2, 김재호1, 김문석1
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| 소속 |
1아주대, 2전북대, 3부경대 |
| 키워드 |
ppg; CL; ROP
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| E-Mail |
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