Abstract
Two FI-type catalysts of Bis[N-(3,5-dicumylsalicylidene)-naphthylaminato]zirconium(IV) dichloride (catalyst (a)) and Bis[N-(3,5-dicumylsalicylidene)-anthracylaminato]zirconium(IV) dichloride (catalyst (b)) were prepared and used for ethylene polymerization comparatively. Methylaluminoxane (MAO) was used as cocatalyst. Polymerization reactions of ethylene using the prepared catalysts at the different conditions of polymerization were carried out. Plurality of the fused aromatic rings on the N atom of the imine in the catalyst structure affected the polymerization activity and molecular weight of the resulting polymer as well. Productivity of the prepared catalysts increased with the addition of [Al]/[Zr] molar ratio. The highest activity was observed at about 35–40 °C for the catalysts. The catalyst (b) produced higher viscosity average molecular weight (Mv) of the obtained polyethylene, while generally the activity of the catalyst (a) was higher than the catalyst (b). Similar behavior was observed for the polymerization carried out at the monomer pressure of 2 to 6 bars using the catalysts. The higher the pressure the more activity of the catalysts obtained, in the range studied. Crystallinity and melting point of the obtained polymer were between 55–65% and 120–135 °C respectively. Higher pressure increased both the crystallinity and the Mv values of the resulting polymer. The polymerization was carried out using different amounts of hydrogen. Higher amount of hydrogen could increase the activity of the catalysts. A linear dependence between the polymerization time and the molar weight was observed, however the polydispersity was broadened with the time.
Similar content being viewed by others
References
Vestberg T, Denifl P, Wilen C-E (2008) J Appl Polym Sci 11:2021
Kashiwa NJ (2004) Polym Sci Part A: Polym Chem 42:1
Zohuri GH, Ahmadi Bonakdar M, Damavandi S, Eftekhar M, Askari M, Ahmadjo S (2009) Iran Polym J 18:7
Kaminsky WJ (2004) Polym Sci Part A: Polym Chem 42:3911
Gibson VC, Spitzmesser SK (2003) Chem Rev 103:283
Suhm J, Heinemann J, Worner C, Muller P, Stricker F, Kressler J, Okuda J, Mulhaupt R (1998) Macromol Symp 129:1
McKnight AL, Waymouth RM (1998) Chem Rev 98:2587
Britovsek GJP, Gibson VC, Wass DF (1999) Angew Chem Int Ed 38:429
Gibson VC, Spitzmesser SK (2003) Chem Rev 103:283
Ittel SD, Johnson LK, Brookhart M (2000) Chem Rev 100:1169
Alt HG, Koppl A (2000) Chem Rev 100:1205
Chen EY-X, Marks TJ (2000) Chem Rev 100:1391
Nomura K (2005) In: Bevy LP (ed) New developments in catalysis research. Nova Science Publishers, Inc, New York, p 199
Nomura K, Liu J, Padmanabhan S, Kitiyanan B (2007) J Mol Catal A 267:1
Matsui S, Fujita T (2001) Catal Today 66:63
Matsukawa N, Matsui S, Mitani M (2001) J Mol Catal A: Chem 169:99
Furuyama R, Saito J, Ishii SI, Mitani M, Matsui S, Tohi Y, Makio H, Matsukawa N, Tanaka H, Fujita T (2003) J Mol Catal A: Chem 200:31
Nakayama Y, Bando H, Sonabe Y, Fujita T (2004) J Mol Catal A: Chem 213:141
Younkin TR, Connor EF, Henderson JI, Friedrich SK, Grubbs RH, Bansleben DA (2000) Science 287:460
Ahmadjo S, Jamjah R, Zohuri GH, Damavandi S, Nekomanesh M, Javaheri M (2007) Iran Polym J 16:31. doi:31
Brandrup J, Immergut EH (1989) Polymer handbook VII, 3 rd Edth edn. Wiley, New York, pp 1–7
Justino J, Dias AR, Ascenso J, Marcues MM, Tait PJT (1997) Polym Int 44:412
Yasunori Y, Shigekazu M, Terunori F (2005) J Organomet Chem 690:4382
Matsui S, Mitani M, Saito J, Ishii SI, Mitani M, Matsui S, Tohi Y, Makio H, Matsukawa N, Tsuru K, Masatoshi N, Nakano T, Tanaka H, Kashiwa N, Fujita T (2001) J Am Chem Soc 123:6847
Peacock AJ (2000) Handbook of Polyethylene. Marcel Dekker, INC, New York
Santos JHZD, Rosa MBD, Krug C, Stedile FCS, Haag MC, Dupont J, Forte MDC (1996) J Polym Sci A: Polym Chem 37(13):1987
Kuran W (2001) Principles of coordination polymerization. Wiley, New York, p 10
Suzuki Y, Terao H, Fujita T (2003) Bull Chem Soc Jpn 76:1493
Ishii S, Saito J, Mitani M, Mohri J, Matsukawa N, Tohi Y, Matsui S, Kashiwa N, Fujita T (2002) J Mol Catal 179:11
Rieger B, Saunders Baugh L, Kacker S, Striegler S (eds) (2003) Late transition metal polymerization catalysis. Wiley-VCH, Weinheim
Zhang J, Wang X, Jin GX (2006) Coord Chem Rev 250:95
Ivanchev SS, Trunov VA, Rybakov VB, Albov DV, Rogozin DG (2005) Dik Phys Chem 404:165
Tohi Y, Makio H, Matsui S, Onda M, Fujita T (2003) Macromolecules 36:3
MAkio H, Fujita T (2004) Macromol Symp 213:221
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Damavandi, S., Galland, G.B., Zohuri, G.H. et al. FI Zr-type catalysts for ethylene polymerization. J Polym Res 18, 1059–1065 (2011). https://doi.org/10.1007/s10965-010-9507-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10965-010-9507-0