Search Results - "Leinonen, Timo"

Modeling the Stabilization of Surface Defects by Donors in Ziegler–Natta Catalyst Support by Bazhenov, Andrey, Linnolahti, Mikko, Pakkanen, Tapani A, Denifl, Peter, Leinonen, Timo

“…We describe a concept for modeling structural defects in crystalline magnesium dichloride used as a support in the Ziegler–Natta polymerization catalysis. The…”
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Stabilization of magnesium dichloride surface defects by mono- and bidentate donors by Kuklin, Mikhail S., Bazhenov, Andrey S., Denifl, Peter, Leinonen, Timo, Linnolahti, Mikko, Pakkanen, Tapani A.

“…We evaluate the stabilization of magnesium dichloride surfaces by mono- and bidentate electron donors typically used in heterogeneous Ziegler–Natta olefin…”
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A Study of Ziegler-Natta Propylene Polymerization Catalysts by Spectroscopic Methods by Tkachenko, Olga P, Kucherov, Alexey V, Kustov, Leonid M, Virkkunen, Ville, Leinonen, Timo, Denifl, Peter

“…Ziegler-Natta polymerization catalysts were characterized by a complex of surface- and bulk-sensitive methods (DRIFTS, XPS, ESR, and XAS = XANES + EXAFS). A…”
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Suomen ja Venäjän metsänkäsittelyohjeiden vertailu by Elina Välkky, Timo Leinonen

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Alkylation of titanium tetrachloride on magnesium dichloride in the presence of Lewis bases by Linnolahti, Mikko, Pakkanen, Tapani A., Bazhenov, Andrey S., Denifl, Peter, Leinonen, Timo, Pakkanen, Anneli

“…[Display omitted] •All relevant catalyst components are included in the periodic calculations.•TiCl4 prefers octahedral coordination on both (104) and (110)…”
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Modeling Coadsorption of Titanium Tetrachloride and Bidentate Electron Donors on Magnesium Dichloride Support Surfaces by Bazhenov, Andrey S, Denifl, Peter, Leinonen, Timo, Pakkanen, Anneli, Linnolahti, Mikko, Pakkanen, Tapani A

“…Coadsorption of titanium tetrachloride and two representative bidentate electron donors on magnesium dichloride surfaces is systematically studied by means of…”
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Polyethylenimines: Multidentate Electron Donors for Ziegler–Natta Catalysts by Nissinen, Ville H, Linnolahti, Mikko, Bazhenov, Andrey S, Pakkanen, Tuula T, Pakkanen, Tapani A, Denifl, Peter, Leinonen, Timo, Jayaratne, Kumudini, Pakkanen, Anneli

“…Polyethylenimines, polymers bearing amino functionalities, are studied for the first time as internal electron donors for Ziegler–Natta catalysts. An advantage…”
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Stabilization of magnesium dichloride surface defects by mono- and bidentate donors by Kuklin, Mikhail S, Bazhenov, Andrey S, Denifl, Peter, Leinonen, Timo, Linnolahti, Mikko, Pakkanen, Tapani A

“…We evaluate the stabilization of magnesium dichloride surfaces by mono- and bidentate electron donors typically used in heterogeneous Ziegler-Natta olefin…”
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Modeling of Substitutional Defects in Magnesium Dichloride Polymerization Catalyst Support by Bazhenov, Andrey, Linnolahti, Mikko, Karttunen, Antti J, Pakkanen, Tapani A, Denifl, Peter, Leinonen, Timo

“…We evaluate methods and models for the periodic quantum chemical treatment of defects in MgCl2 polymerization catalyst support and demonstrate the…”
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Microstructure control of magnesium dichloride crystallites by electron donors: The effect of methanol by Turunen, Anniina, Linnolahti, Mikko, Karttunen, Virve A., Pakkanen, Tapani A., Denifl, Peter, Leinonen, Timo

“…The shapes of magnesium dichloride crystallites can be controlled by electron donors, as demonstrated by quantum chemical calculations using methanol as a…”
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Structural studies on a solid self-supported Ziegler–Natta-type catalyst for propylene polymerization by Rönkkö, Hanna-Leena, Knuuttila, Hilkka, Denifl, Peter, Leinonen, Timo, Venäläinen, Tapani

“…The article describes structural studies on a solid MgCl 2-based TiCl 4 Ziegler–Natta catalyst for propylene polymerization prepared via emulsion technique…”
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Particle growth and fragmentation of solid self-supported Ziegler–Natta-type catalysts in propylene polymerization by Rönkkö, Hanna-Leena, Korpela, Tarmo, Knuuttila, Hilkka, Pakkanen, Tuula T., Denifl, Peter, Leinonen, Timo, Kemell, Marianna, Leskelä, Markku

“…The article describes fragmentation studies on solid Ziegler–Natta-type catalysts prepared via emulsion technique. Propylene gas-phase polymerizations in a…”
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Complex formation and characterization of MgCl 2/2-(2-ethylhexyloxy)ethanol adduct by Rönkkö, Hanna-Leena, Knuuttila, Hilkka, Linnolahti, Mikko, Haukka, Matti, Pakkanen, Tuula T., Denifl, Peter, Leinonen, Timo

“…Complex formation of MgCl 2 with 2-(2-ethylhexyloxy)ethanol was studied with IR and NMR spectroscopic methods and with molecular modeling in order to find out…”
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Solid state 13C NMR characterisation study on fourth generation Ziegler–Natta catalysts by Heikkinen, Harri, Liitiä, Tiina, Virkkunen, Ville, Leinonen, Timo, Helaja, Tuulamari, Denifl, Peter

“…In this study, solid state 13C NMR spectroscopy was utilised to characterize and identify the metal–ester coordination in active fourth generation (phthalate)…”
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Complex formation and characterization of MgCl2/2-(2-ethylhexyloxy)ethanol adduct by Rönkkö, Hanna-Leena, Knuuttila, Hilkka, Linnolahti, Mikko, Haukka, Matti, Pakkanen, Tuula T., Denifl, Peter, Leinonen, Timo

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Forest regeneration in Northern and Northwestern Russia in 1993–2004—Methods, results and development needs by Leinonen, Timo, Sungurov, Rudolf, Kolström, Taneli, Sokolov, Alexandr, Žigunov, Anatoly, Dorošin, Anton

“…Concern about the sustainability of forestry in Russia has increased, especially among the end-users of forest products in Europe. A key factor in sustainable…”
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Forest regeneration in Northern and Northwestern Russia in 1993-2004-Methods, results and development needs by LEINONEN, Timo, SUNGUROV, Rudolf, KOLSTRÖM, Taneli, SOKOLOV, Alexandr, ZIGUNOV, Anatoly, DOROSIN, Anton

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Mn doping of the Ziegler-Natta PP catalyst support material by Garoff, Thomas, Leinonen, Timo

“…Preliminary tests have shown that if MnCl 2 is used as a support material a polypropylene with a low molecular weight is produced. The activity of these…”
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