| 학회 |
한국고분자학회 |
| 학술대회 |
2007년 봄 (04/12 ~ 04/13, 제주 ICC) |
| 권호 |
32권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Molecular design of novel pH and temperature block copolymer hydrogels |
| 초록 |
PCL-PEG-PCL triblock copolymers were obtained by the ring-opening polymerization of ε-caprolactone(CL) using poly(ethylene glycol(PEG) as a macroinitiator in the presence of Sn(Oct)2. pH sensitive moieties such as poly(β-amino ester)(PAE) and poly(amido amine)(PAA) were introduced by Michael-type step polymerization. These triblock copolymer were acylated by acryloyl chloride, and then pentablock copolymers PAE/PAA-PCL-PEG-PCL-PAE/PAA were synthesized by addition polymerization from the acylated triblock copolymer with the mixture of PAE and PAA. The polymer composition was optimized for the appropriate sol(flow)-gel(non flow) transition. The weight ratio of PCL to PEG was controlled by adjusting the feed ratio, and triblock and pentablock copolymers were characterized by 1H-NMR spectroscopy and GPC. Aqueous media of the pentablock copolymers changed from a sol phase(flow) to a gel phase(non flow) with increasing temperature and pH. |
| 저자 |
우엔민칸1, 이두성2
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| 소속 |
1성균관대 / 제2공학관 고분자 공학과 25505호, 2성균관대 |
| 키워드 |
Temperature & pH sensitve copolymer; Sol-Gel transition
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| E-Mail |
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