Copolymerization of ethene with styrene using CGC catalysts: the effect cyclopentadienyl ligand substitution on the catalyst activity and the copolymer structure
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F04%3A00030760" target="_blank" >RIV/00216224:14310/04:00030760 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Copolymerization of ethene with styrene using CGC catalysts: the effect cyclopentadienyl ligand substitution on the catalyst activity and the copolymer structure
Original language description
The ethenestyrene copolymerization has been investigated using the dimethylsilylene-bridged (amidocyclopentadienyl)dichlorotitanium( IV) complexes [TiCl2{5-1-(SiMe2Nt-Bu-N)-2,3,4-Me3-5-R-C5}], where R=Me (1), H (2), Bu (3), Ph (4), 4-fluorophenyl (5), and but-2-en-2-yl (6) in combination with methylalumoxane (MAO) as catalysts. The nature of the substituent R strongly influenced the catalyst activity and selectivity and the copolymer microstructure and molecular weight. The catalysts derived from 1 to 3were by about one order more active than those derived from 4 to 6. At the optimum Al/Ti molar ratio of 900, the highly active catalysts produced a pseudo-random copolymer (9597 wt.%) containing up to 47.8 mol% of incorporated styrene. The low-active catalysts gave mixtures of a pseudo-random copolymer (7685 wt.%) with polyethene (10 wt.%) and polystyrene sequences (37 wt.%). The X-ray diffraction crystal structures of 2 and 4 were determined.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LN00B142" target="_blank" >LN00B142: Research centre for complex crude oil processing</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2004
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of molecular catalysis A:Chemical
ISSN
1381-1169
e-ISSN
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Volume of the periodical
2004
Issue of the periodical within the volume
224
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
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UT code for WoS article
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EID of the result in the Scopus database
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