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Homogeneous metallocene/MAO-catalyzed polymerizations of polar norbornene derivatives: copolymerizations using ethene, and terpolymerizations using ethene and norbornene

✍ Scribed by Ralf Alexander Wendt; Gerhard Fink


Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
108 KB
Volume
201
Category
Article
ISSN
1022-1352

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The production of ethene/propene/5-ethyl
✍ Anneli Malmberg; Barbro LΓΆfgren πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 191 KB πŸ‘ 2 views

Metallocene catalysts Et(Ind) 2 ZrCl 2 /MAO and Et(Ind) 2 H fCl 2 /MAO were used in ethene/propene copolymerization and in ethene/propene/5-ethylidene-2-norbornene (E/P/ENB) terpolymerization. The copolymerization activity of the Et(Ind) 2 ZrCl 2 / MAO system was 20 1 10 3 kg polym /mol Mt \* h, the

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When characterized with 13 C-NMR, it was found that norbornene-ethylene copolymers had a more complicated microstructure when dimethylsilyl bis(indenyl) zirconium dichloride was used as the catalyst compared to ethylene bis(indenyl) zirconium dichloride. One could see more block sequences but less a

Effects of polymerization conditions whe
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Using 70 mol % norbornene in the monomer mixture before polymerization, the influences of different polymerization conditions were studied. It was found that by increasing the temperature from 10 to 70ЊC, the yield increased and the molecular weight decreased; and when increasing the ethylene pressu