| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 고분자 합성 |
| 제목 | Synthesis of Star Poly(n-hexyl isocyanate) with Sodium 1,3,5-Benzenetricarboxanilide by Anionic Polymerization |
| 초록 | Many star polymers have been synthesized and studied due to great effects of modification of polymer architecture on its properties1. Such effects as high segmental density and low viscosity make the synthesis of star-typed polymers very interesting2. In spite of severe experimental limits, living anionic polymerization is still one of the best approaches to prepare well-controlled star-type polymers. Thus, star-typed polymers with narrow molecular distribution (MWD) and controlled molecular weight (MW) can be obtained3 and well characterized. Until now, the study of star polymers with rod-like parts has received much less attention than coil-like ones and only several scientists with interest have begun to synthesize the rod-like polymer, but the properties of these polymer were not characterized well due to low solubility and molecular weight4. But, Novak et. al. have recently succeeded in synthesizing the well-defined polyisocyante star polymers by coordination polymerization and characterizing well5. In this study, we report the synthesis of poly (n-hexyl isocyanate) (PHIC) star polymer and star block copolymer with sodium 1,3,5-benzenetricarboxanilide (Na-BTA) as a novel initiator in presence of sodium tetraphenylborate (NaBPh4) as an additive by anionic polymerization. Na-BTA was synthesized newly for polymerization of star PHIC. When the concentration of NaBPh4 reached at the 12 times larger than that of the initiator, the yields of polymer were more than 90% with intended molecular weight and narrow molecular weight distribution in range from 1.11 to 1.12. PHIC star polymer was characterized using Ubbelohde viscometer, 1H -NMR, SEC-LS, and FT-IR. These star polymers can be applied for nano materials with well-controlled structures. Fig. 1. Anionic Polymerization of n-HIC using Na-BTA in presence of NaBPh4 References 1. (a) Hsieh, H.L.; Quirk, R.P. Anionic polymerization: Principles and Practical Application Marcel Dekker: New York, 1996, pp 333-366. (b) J. Roovers, Encyclopedia of Polymer Science and Engineering, 2nd ed., Kroschwitz j. l.,Wiley New York, 1985, Vol.2, p. 478. 2. (a) Joshep C. S. Polymeric Materials Encyclopedia Vol.4; CRC press Boca Raton, New York, London, Tokyo. 1996 pp 2856-2857. (b) Quirk, R. P.; Tsai, Y. Macromolecules 1998, 31, 8016. 3. (a) Quirk, R. P.; Yoo, T.; Lee, Y.; Kim, J.; Lee, B. Adv. Polym. Sci. 2000, 153, 67. (b) Roovers, J.; Bywater S.Macromolecules 1972, 5, 384. (c) Roovers, J.; Bywater S.Macromolecules 1974, 7, 443. (d) H Grest,G. S.; Fetters, L. J.; Huang, J. S.; Richter, D. Adv. Chem.Phys. 1996, 94, 67Hadjichristidis, N.; Roovers, J. J. Polym. Sci. Polym. Phys. Ed.1974, 12, 2521. 4. (a) Sasaki, T.; Kaiser, E. T. J. Am. Chem. Soc. 1989, 111, 380. (b) Reichert, V. R.; Mathias, L. J. Macromolecules 1994, 27, 380. (c) Oka, M.; Nakajima, A. Polym. Bull. 1984, 11, 447. (d) Mathias, L. J.; Reichert, V. R.; Muir, A. V. G. Chem. Mater.1993, 5, 4. (e) Reichert, V. R.; Mathias, L. J. Macromolecules 1994, 27, 380. 5. Hoff, S. M.; Novak, B. M. Macromolecules 2001, 34, 3849. |
| 저자 | 유희수, 정찬희, 이재석 |
| 소속 | 광주과학기술원 신소재공학과 |
| 키워드 | star polymer; polyisocyanate; anionic polymerization |
