화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.28, No.3, 245-252, May, 2004
Export Citation
양이온성 η3-알릴 팔라듐 촉매를 사용한 폴리(5-헥실-2-노보넨-co-5-메틸에스터-2-노보넨)의 비닐 부가 중합 거동
Vinyl Addition Polymerization Behavior of Poly(5-hexyl-2-norbornene-co-5-methylester-2-norbornene)s Using Cationic η3-Allyl Palladium Catalyst
안재철, 박기홍†
  • 한국과학기술연구원 광전자재료 연구센터
Jae Chul Ahn, and Ki Hong Park†
  • Opto-electronics material Research Center, Korea Institute of Science and Technology, P.O. BOX 131, Seoul 136-791, Korea
E-mail:
초록
5-헥실-2-노보넨 (HNB)과 5-메틸에스터-2-노보넨 (MES-NB)을 양이온 η3-알릴 팔라듐 촉매인 [(η3-allyl) palladium(tricyclohexylphosphine) trifluoroacetate)와 리튬계 조촉매 [lithium tetrakis(pentafluorophenyl) borate·2.5etherate]를 사용하여 비닐 부가형의 폴리보노넨 공중합체를 합성하였다. 에스터기를 과량 함유한 폴리노보넨을 제조하기 위한 최적 중합 조건을 조사하기 위하여 여러 가지 중합조건에 따른 분자량변화와 수율의 변화를 알아보았다. 팔라듐 촉매의 함량이 많을수록 수득율은 증가하는 한편, 분자량은 감소하였으며, 리튬조촉매의 함량은 많을수록 분자량과 수득율이 동시에 증가하였다. 사슬이동제를 이용하여 분자량을 조절할 수 있었고, 사슬이동제의 길이가 긴 1-데센과 1-옥텐이 1-헥센보다 분자량을 더 감소시키는 역할을 하였다. 한편 사슬이동제의 양은 수율에 큰 영향을 미치지 않았다. HNB/MES-NB (투입비 40/60 mol%)의 공중합체의 1H-NMR과 GPC 분석으로부터, 실제 에스터 함유량은 약 25 mol%인 고분자량 (Mw: 270,000)의 폴리보노넨 공중합체가 얻어짐을 알 수 있었다.
We synthesized the vinyl addition-type polynorbornene copolymers using two monomers [5-hexyl-2-norbornene (HNB) and 5-methylester-2-norbornene(MES-NB)] by means of a cationic η3-allyl palladium catalyst system {[(η3-allyl)palladium(tricyclohexylphosphine) trifluoroacetate] and [lithium tetrakis(pentafluorophenyl) borate·2.5etherate]}. The molecular weights and yields of copolynorbornenes polymerized in various conditions were measured to investigate an optimum polymerization conditions to obtain highly ester-functionalized polynorbornenes. As a Pd catalyst content increased, the molecular weights (Mw) of polymers decreased while polymer yields increased. Also, as a Li cocatalyst content increased, the Mw's and yields of polymers increased at the same time. The Mw's of copolymers were also controlled by chain transfer agents such as 1-hexene, 1-octene and 1-decene, and we found that longer 1-decene and 1-octene were more efficient to reduce the Mw's of polynorbornenes than 1-hexene. On the other hand, the content of chain transfer agents did not give influence significantly on polymer yields. From the 1H-NMR and GPC analysis of HNB/MES-NB (feed ratio of 40/60 mol%) copolymer, we found that this copolymer had an about 25 mol% of ester portion and a high molecular weight of 270,000.
Keywords:cationic Pd catalyst;vinyl addition polymerization;5-hexyl-2-norbornene;5-methylester-2-norbornene
  1. Kennedy JP, Makowski HS, J. Macromol. Sci.-Chem., A1, 345 (1967)
  2. Gaylord NG, Deshpande AB, Mandal BM, Martan M, J. Macromol. Sci.-Chem., A11, 1053 (1977)
  3. Schrock RR, Feldman J, Cannizzo LF, Grubbs RH, Macromolecules, 20, 1172 (1987) 
  4. Heroguez V, Fontanille M, J. Polym. Sci. A: Polym. Chem., 32(9), 1755 (1994) 
  5. Schwab P, Grubbs RH, Ziller JW, J. Am. Chem. Soc., 118(1), 100 (1996) 
  6. Burmaghim JL, Girolami GS, Organometallics, 18, 1923 (1999) 
  7. Kaminsky W, Noll A, Polym. Bull., 31, 175 (1993) 
  8. Ruchatz D, Fink G, Macromolecules, 31(15), 4674 (1998) 
  9. Goodall BL, McIntosh LH, Rhodes LF, Makromol. Chem. Macromol. Symp., 89, 421 (1995)
  10. Hennis A, Polley J, Long G, Sen S, Organometallics, 20, 2802 (2001)
  11. Lipian J, Mimna RA, Fondran JC, Yandulov D, Shick RA, Goodall BL, Rhodes LF, Huffman JC, Macromolecules, 35(24), 8969 (2002) 
  12. Ahn JC, Park SH, Lee KH, Park KH, Polym.(Korea), 27(5), 429 (2003)
  13. Haselwander TFA, Heitz W, Krugel SA, Wendorff JH, Macromol. Chem. Phys., 197, 3435 (1996) 
  14. Lipian JH, Rhodes LF, Goodall BL, Bell A, Mimna RA, Fondran JC, Jayaraman S, Hennis AD, Elia CN, Polley JD, Sen A, U.S. Patent, 6,455,650 (2002)
  15. Yoon KB, Lee DH, Polym.(Korea), 28(3), 281 (2004)