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1

Influence of the catalyst and polymerization conditions on the long-chain branching of metallocene-catalyzed polyethenes

Esa Kokko, Anneli Malmberg, Petri Lehmus, Barbro Löfgren, Jukka V. Seppälä

Journal:

Journal of Polymer Science Part A: Polymer Chemistry

Année:

2000

Langue:

english

Fichier:

PDF, 205 KB

english, 2000

2

Copolymerization of ethene with 1-hexene or 1-hexadecene over ethylene, dimethylsilylene and 1,4-butanediylsilylene bridged bis(indenyl) and bis(tetrahydroindenyl)zirconium dichlorides

Petri Lehmus, Outi Härkki, Reko Leino, Hendrik J. G. Luttikhedde, Jan H. Näsman, Jukka V. Seppälä

Journal:

Macromolecular Chemistry and Physics

Année:

1998

Langue:

english

Fichier:

PDF, 678 KB

english, 1998

3

Copolymerization of ethylene with 1-hexene or 1-hexadecene over siloxy-substituted metallocene catalysts

Outi Härkki, Petri Lehmus, Reko Leino, Hendrik J. G. Luttikhedde, Jan H. Näsman, Jukka V. Seppälä

Journal:

Macromolecular Chemistry and Physics

Année:

1999

Langue:

english

Fichier:

PDF, 57 KB

english, 1999

4

Synthesis and characterization of a silyl substituted bis(indenyl) zirconium dichloride and comparison of its olefin polymerization behavior to a siloxy substituted analogue

Peter Ekholm, Petri Lehmus, Esa Kokko, Matti Haukka, Jukka V. Seppälä, Carl-Eric Wilén

Journal:

Journal of Polymer Science Part A: Polymer Chemistry

Année:

2001

Langue:

english

Fichier:

PDF, 165 KB

english, 2001

5

Oxygen-Containing, Asymmetric “Dual-Side” Zirconocenes: Investigations on a Reversible Chain Transfer to Aluminum

Jürgen Kukral, Petri Lehmus, Martti Klinga, Markku Leskelä, Bernhard Rieger

Journal:

European Journal of Inorganic Chemistry

Année:

2002

Langue:

english

Fichier:

PDF, 184 KB

english, 2002

6

Heteroatom-Substituted Group 4 Bis(indenyl)metallocenes

Reko Leino, Petri Lehmus, Ari Lehtonen

Journal:

Année:

2004

Fichier:

PDF, 10 KB

2004

7

Heteroatom-Substituted Group 4 Bis(indenyl)metallocenes

Reko Leino, Petri Lehmus, Ari Lehtonen

Journal:

European Journal of Inorganic Chemistry

Année:

2004

Langue:

english

Fichier:

PDF, 425 KB

english, 2004

8

Activation and Polymerisation of ansa-Zirconocene Chloroamido Complexes

Tanja Seraidaris, Barbro Löfgren, Nora Mäkelä-Vaarne, Petri Lehmus, Udo Stehling

Journal:

Macromolecular Chemistry and Physics

Année:

2004

Langue:

english

Fichier:

PDF, 159 KB

english, 2004

9

Propylene Polymerization with rac-SiMe2(2-Me-4-PhInd)2ZrMe2/MAO: Polymer Characterization and Kinetic Models

Mika Lahelin, Esa Kokko, Petri Lehmus, Päivi Pitkänen, Barbro Löfgren, Jukka Seppälä

Journal:

Macromolecular Chemistry and Physics

Année:

2003

Langue:

english

Fichier:

PDF, 386 KB

english, 2003

10

Ethylene–Propylene Copolymerisations: Effect of Metallocene Structure on Termination Reactions and Polymer Microstructure

Antti Tynys, Tapio Saarinen, Kimmo Hakala, Tuulamari Helaja, Tiina Vanne, Petri Lehmus, Barbro Löfgren

Journal:

Macromolecular Chemistry and Physics

Année:

2005

Langue:

english

Fichier:

PDF, 258 KB

english, 2005

11

New bis(imino)pyridine-iron(II)- and cobalt(II)-based catalysts: synthesis, characterization and activity towards polymerization of ethylene

Adnan S Abu-Surrah, Kristian Lappalainen, Ulla Piironen, Petri Lehmus, Timo Repo, Markku Leskelä

Journal:

Journal of Organometallic Chemistry

Année:

2002

Langue:

english

Fichier:

PDF, 133 KB

english, 2002

12

rac-[Ethylenebis(2-(thexyldimethylsiloxy)indenyl)]zirconium dichloride: synthesis, molecular structure and olefin polymerization catalysis

Reko Leino, Hendrik J.G Luttikhedde, Petri Lehmus, Carl-Eric Wilén, Rainer Sjöholm, Ari Lehtonen, Jukka V Seppälä, Jan H Näsman

Journal:

Journal of Organometallic Chemistry

Année:

1998

Langue:

english

Fichier:

PDF, 173 KB

english, 1998

13

Long-Chain Branched Polyethene Polymerized by Metallocene Catalysts Et[Ind] 2 ZrCl 2 /MAO † and Et[IndH 4 ] 2 ZrCl 2 /MAO ‡

Malmberg, Anneli, Kokko, Esa, Lehmus, Petri, Löfgren, Barbro, Seppälä, Jukka V.

Journal:

Année:

1998

Langue:

english

Fichier:

PDF, 95 KB

english, 1998

14

m eso - and rac -Diastereomers of 1- and 2- tert -Butyldimethylsiloxy- Substituted Ethylenebis(indenyl)zirconium Dichlorides for Formation of Short- and Long-Chain Branched Polyethene

Kokko, Esa, Lehmus, Petri, Leino, Reko, Luttikhedde, Hendrik J. G., Ekholm, Peter, Näsman, Jan H., Seppälä, Jukka V.

Journal:

Année:

2000

Langue:

english

Fichier:

PDF, 56 KB

english, 2000

15

Homogeneous α-Olefin Polymerizations over Racemic Ethylene-Bridged ansa -Bis(2-( tert -butyldimethylsiloxy)- 1-indenyl) and ansa -Bis(2-( tert -butyldimethylsiloxy)- 4,5,6,7-tetrahydro-1-indenyl) Metallocene Dichlorides

Leino, Reko, Luttikhedde, Hendrik J. G., Lehmus, Petri, Wilén, Carl-Eric, Sjöholm, Rainer, Lehtonen, Ari, Seppälä, Jukka V., Näsman, Jan H.

Journal:

Année:

1997

Langue:

english

Fichier:

PDF, 224 KB

english, 1997

16

Dual-Side ansa -Zirconocene Dichlorides for High Molecular Weight Isotactic Polypropene Elastomers

Kukral, Jürgen, Lehmus, Petri, Feifel, Tanja, Troll, Carsten, Rieger, Bernhard

Journal:

Organometallics

Année:

2000

Langue:

english

Fichier:

PDF, 173 KB

english, 2000

17

Homo- and Copolymerization of Ethylene and α-Olefins over 1- and 2-Siloxy-Substituted Ethylenebis(indenyl)zirconium and Ethylenebis(tetrahydroindenyl)zirconium Dichlorides

Lehmus, Petri, Kokko, Esa, Härkki, Outi, Leino, Reko, Luttikhedde, Hendrik J. G., Näsman, Jan H., Seppälä, Jukka V.

Journal:

Année:

1999

Langue:

english

Fichier:

PDF, 70 KB

english, 1999

18

Chain End Isomerization as a Side Reaction in Metallocene-Catalyzed Ethylene and Propylene Polymerizations

Lehmus, Petri, Kokko, Esa, Leino, Reko, Luttikhedde, Hendrik J. G., Rieger, Bernhard, Seppälä, Jukka V.

Journal:

Année:

2000

Langue:

english

Fichier:

PDF, 88 KB

english, 2000

19

Cyclopentadienyl Surface as a Support for Zirconium Polyethylene Catalysts

Iiskola, Eero I., Timonen, Sari, Pakkanen, Tuula T., Härkki, Outi, Lehmus, Petri, Seppälä, Jukka V.

Journal:

Année:

1997

Langue:

english

Fichier:

PDF, 230 KB

english, 1997

20

Copolymerisation properties of siloxy-substituted bis(indenyl)zirconocene catalysts: modified rheological behaviour

Seppälä, Jukka, Löfgren, Barbro, Lehmus, Petri, Malmberg, Anneli

Journal:

Macromolecular Symposia

Année:

2001

Fichier:

PDF, 1.32 MB

2001