Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Esa Kokko"'
Autor:
Muhammad Ahsan Bashir, Sameer Vijay, Esa Kokko, Mohammad Al-Haj Ali, Vasileios Kanellopoulos, Jukka Seppälä
Publikováno v:
Macromolecular Reaction Engineering. 7:193-204
The dependence of predictive capabilities of SL EOS on the pure characteristic parameters of monomers and polymers is investigated. A sensitivity analysis study is carried out to understand the effect of these parameters on the predictive capability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28db33304428e7d044c029f6ac27bbfc
https://doi.org/10.1002/mren.201200054
https://doi.org/10.1002/mren.201200054
Publikováno v:
Organometallics. 30:1350-1358
The effect of the metal on elementary chain propagation and termination reactions in hafnocene- and zirconocene-catalyzed olefin copolymerization processes has been systematically studied by quantum chemical methods. Two consecutive monomer insertion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cfca9323a2379dcd455d946255aacf6
https://doi.org/10.1021/om100761p
https://doi.org/10.1021/om100761p
Publikováno v:
Organometallics. 29:1541-1550
A comparative quantum chemical study has been performed to shed light on the fundamental differences between hafnocenes and zirconocenes concerning reactions between the metals and α-olefin monomers, namely, ethene, propene, 1-butene, and 1-hexene.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7c8d416cd0454710d87c89bf11b082d
https://doi.org/10.1021/om900843h
https://doi.org/10.1021/om900843h
Publikováno v:
European Polymer Journal. 45:863-869
A study of 1-hexene polymerization with ethylene-bis(9-fluorenyl) hafnium dichloride has been carried out using two different cocatalyst systems, methyl-aluminoxane/trimethylaluminum (MAO/TMA) and tris-isobutyl-aluminum/N,N-dimethylanilinium tetrakis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cfa55b20c5fdfe27ed744a44bcf2df3
https://doi.org/10.1016/j.eurpolymj.2008.11.027
https://doi.org/10.1016/j.eurpolymj.2008.11.027
Autor:
John Severn, Esa Kokko, Päivi Pitkänen, Tapani A. Pakkanen, Janne Maaranen, Anneli Pakkanen, Mikko Linnolahti, Virve A. Karttunen
Publikováno v:
Journal of Organometallic Chemistry. 693:3915-3922
Ligand effects on chain termination reactions in hafnocene-catalyzed ethene polymerization process have been systematically studied by quantum chemical methods. β-hydrogen transfer to metal, β-hydrogen transfer to monomer and hydrogenolysis were st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e90a4f9547ecc9f07fe2d70e7c2fca05
https://doi.org/10.1016/j.jorganchem.2008.09.070
https://doi.org/10.1016/j.jorganchem.2008.09.070
Autor:
Päivi Pitkänen, Janne Maaranen, Virve A. Karttunen, John Severn, Esa Kokko, Mikko Linnolahti, Tapani A. Pakkanen
Publikováno v:
Organometallics. 27:3390-3398
The influence of the ligand structures of hafnocene polymerization catalysts on ethene insertion and chain propagation was systematically studied by quantum chemical methods. Altogether 54 hafnocenes were studied as a function of the ligand structure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c95d563949e263e39c7a190efa639e33
https://doi.org/10.1021/om800050d
https://doi.org/10.1021/om800050d
Autor:
Virve A. Karttunen, John Severn, Tapani A. Pakkanen, Anniina Turunen, Janne Maaranen, Päivi Pitkänen, Esa Kokko, Mikko Linnolahti
Publikováno v:
Journal of Organometallic Chemistry. 693:155-163
The influence of ligand structure of hafnocenes on activation of the polymerization catalysts has been studied by quantum chemical methods. Altogether 54 hafnocenes were included in the analysis, supplemented by four zirconocenes for comparison. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99a6f7a245579188f4fcf0954125159f
https://doi.org/10.1016/j.jorganchem.2007.10.037
https://doi.org/10.1016/j.jorganchem.2007.10.037
Publikováno v:
Macromolecular Chemistry and Physics. 208:851-861
Six (Cp)(4-phenyl-indenyl)MCl2 (A) and four (Cp)(1-phenyl-indenyl)MCl2 (C) (M=Zr/Hf) based complexes were tested in ethene homo- and copolymerisation under different conditions to explain how the differences in the complex structure affect the polyme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::654b30cd6c50092093bf53e6f8aed888
https://doi.org/10.1002/macp.200600595
https://doi.org/10.1002/macp.200600595
Publikováno v:
Macromolecular Chemistry and Physics. 204:1323-1337
Poly(propylene)s were prepared with metallocene catalyst rac-SiMe2(2-Me-4-PhInd)2ZrMe2/MAO (rac-dimethylsilylbis(2-methyl-4-phenylindenyl)dimethylzirconium/methylaluminoxane) in heptane solution at temperatures from 50 to 80 °C with varying concentr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed7fb224c0e129d7066048132a45299d
https://doi.org/10.1002/macp.200390106
https://doi.org/10.1002/macp.200390106
Publikováno v:
Polymer. 43:6383-6390
The aim of this paper is to compare the results of analytical and rheological characterization techniques with respect to the analysis of long-chain branches (LCB) in polyethylenes. The materials investigated are metallocene-catalyzed ethylene homopo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57506f0154367707c0fa7c7df95414e0
https://doi.org/10.1016/s0032-3861(02)00564-5
https://doi.org/10.1016/s0032-3861(02)00564-5