| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.154 |
| 발표분야 | 고분자 합성 |
| 제목 | Tetracyclododecene / Ethylene Copolymers Prepared with Metallocene Catalysts |
| 초록 | Since Kaminsky discovered that the ansa-metallocenes produce copolymer of norbornene and ethylene (E), much efforts were devoted to the development of cycloolefin copolymer (COC).1, 2, 3 In this poster, tetracyclododecene(TCD) were examined as comonomer for COC initiated with metallocenes and methlyaluminoxane cocatalyst, and the catalyst activity and the polymer structure were examined. The copolymerizations of E and TCD were conducted with the metallocenes such as Cp2ZrCl2 (1), rac-Et(Ind)2ZrCl2 (2) as well as iPr(Cp)(Flu)ZrCl2 (3) and the modified methylaluminoxane (MMAO) cocatalyst. In the copolymerization of E and TCD, the catalyst activity of 2 was larger than that of 1, 3. For 2, 3, the catalyst activity increased with addition of TCD as comonomer. The catalyst activity of 1 decreased with addition of TCD. By the addition of comonomer, Tg of polymer became higher. The effect of MMAO amount on polymerization behaviors of metallocene for E/TCD copolymerization had been examined. In E/TCD copolymerization, the activity increased with increasing the ratio of [Al]/[Zr] for the case of 1. On the contrary, for 2 and 3 catalysts, the ratio of [Al]/[Zr] had little effect on the activity. The 3rd monomer effect on polymerization behaviors of metallocene for E/TCD copolymerization had been examined. In E/TCD copolymerization, the activity increased with decreasing the ratio of 3rd monomer for the case of 1, 2, 3. Fig. 1. 13C-NMR spectrum of ethylene/tetracyclododecene (1/5) copolymer prepared with rac-Et(Ind)2ZrCl2/MMAO catalysts system (Polymerization conditions; [Zr]=2.5×10-4mol/L, [Al]/[Zr]=3000, 40℃, 1h) References 1. K. Soga, M. Ohgizawa, T. Shiono, D. H. Lee, Macromolecules, 24, 699 (1991) 2. D. H. Lee, K. Soga, Polymer, 20, 427 (1996) 3. C. Przybyla, B. Tesche G. Fink, Macromol. Rapid Commun. 20, 328 (1999) |
| 저자 | 박승철1, 이동호1, 노석균2 |
| 소속 | 1경북대, 2영남대 |
| 키워드 | cycloolefin copolymer; metallocene; catalyst; copolymerization |
