| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 고분자 합성 |
| 제목 | Synthesis and micellar behaviors of poly(vinyl alcohol) based block copolymers |
| 초록 | Well-defined amphiphilic diblock copolymers, poly(vinyl alcohol-b-styrene)s (poly(VA-b-St)) were synthesized via consecutive telomerization, atom transfer radical polymerization (ATRP), and saponification. Then, the diblock copolymeric micelles were prepared by dialysis against water, and the formation and average size of micelles were investigated by means of dynamic light scattering (DLS) and transition electron micrograph (TEM). Also, from the fluorescence emission spectrum measurements using pyrene as a fluorescence probe, the critical micelle concentration (CMC) and kinetic stability of micelles formed poly(VA-b-St) copolymers were determined. The size of a micelle was less than 100 nm, and the copolymers formed micelles with CMC in the range of 0.125 ～ 4.47 mg/L. Kinetic stability study of micelles showed increased stability for block copolymers containing PVA block with higher syndiotacticity. A typical TEM image of a sample prepared from a dilute solution of the poly(VA-b-St) copolymer is shown in Figure 1. Figure 1. TEM image of the micelles prepared by poly(VA-b-St) copolymer. Reference 1. K. Yasugi, Y. Nagasaki, M. Kato, K. Kataoka, J. Controlled Release, 62, 89 (1999). 2. M. Wilhelm, C.L. Zhao, Y.C. Wang, R.L. Xu, M.A. Winnik, J.L. Mura, G. Riess, M.D. Croucher, Macromolecules, 24, 1033 (1991). 3. T. Cao, P. Munk, C. Ramireddy, Z. Tuzar, S.E. Webber, Macromolecules, 24, 6300 (1991). 4. G.H. Li, C.G. Cho, Colloid & Polymer Science, 283, 946 (2005). |
| 저자 | 이광화1, 조창기2, 김진곤3 |
| 소속 | 1포항공과대, 2기능성고분자 신소재연구센타, 3한양대 |
| 키워드 | poly(VA-b-St); micelle; critical micelle concentration; kinetic stability |
