| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.583 |
| 발표분야 | 기능성 고분자 |
| 제목 | Novel thermo-sensitive poly(acrylamides) and their properties. |
| 초록 | New N-substituted acrylamide monomers (DPAA and NDPA) having benzene ring and long alkyl chains were synthesized by reacting acryloyl chloride and 4-(4-acryloylaminophenyl)butyric acid with 4-dodecylaniline in the presence of EDC, a dehydrating agent. The monomers were observed to show a smectic texture by optical polarizing microscopy. The resulting homopolymer and the copolymers (DPAA/NIPAM and NDPA/NIPAM) with weight average molecular weights of 5,000~85,000 were prepared by a radical chain polymerization. The polymers exhibited a sol-gel phase transition behavior with the change of temperature in hydrophobic solvents such as benzene and toluene. The phase transition temperature was dependent not only on the composition ratio of the new monomer in the copolymer but also on the kind of solvent. The temperature dependent sol-gel transition behavior was confirmed by dynamic light scattering. Figure 1. Structure of new N-substituted acrylamide monomers. Figure 2. Temperature-dependent sol-gel phase transition behavior of the NDPA polymer solutions in benzene. References [1] Osada, Y; Okuzaki, H; Hori, H. Nature, 1992, 325, 242. [2] Yasuda, Y; Takebe,Y; Shirota,Y. Adv. Mater., 1996, 8(9), 740. [3] Park, S. Y; Han, D. K; Kim, S. C. Macromolecules, 2001, 34, 8821. [4] Han, Y. K; Lee, E. A; Keum, S.H; Kim, H. S; Cho, B. k; Kim, S.C., Korea Patent Application # 2003-0089214 (December 10, 2003). |
| 저자 | 김형완, 이민기, 한양규 |
| 소속 | 한양대 |
| 키워드 | sol-gel transition |
