Highly isotactic polypropene prepared with rac-dimethylsilyl-bis (2-methyl-4-t-butyl-cyclopentadienyl) zirconiumdichloride : an NMR investigation of the polymer microstructure
| Type of Publication: | Journal article |
| URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-241545 |
| Author: | Rieger, Bernhard; Reinmuth, Annette; Röll, Werner; Brintzinger, Hans-Herbert |
| Year of publication: | 1993 |
| Published in: | Journal of Molecular Catalysis ; 82 (1993), 1. - pp. 67-73. - ISSN 0304-5102. - eISSN 1873-314X |
| DOI (citable link): | https://dx.doi.org/10.1016/0304-5102(93)80071-2 |
| Summary: |
Isotactic polypropene was prepared using rac-dimethyl-silylbis(2-methyl-4-t-butyl-cyclopentadienyl) zirconiumdichloride (1) and methylalumoxane (MAO) at temperatures between 0 and 80°C and with Al/Zr ratios of 300 and 1500. The polymers, prepared at temperatures below 30°C had melting points of 162°C and above. The chain ends were determined by means of distortionless enhancement by polarization transfer (DEPT)-NMR spectroscopy. The pentad intensities were corrected according to the chemical shifts of the end groups. The intensity distributions are shown to arise from enantiomorphic site control of the chiral catalyst species.
|
| Subject (DDC): | 540 Chemistry |
| Keywords: | Chiral zirconocenes, isotactic polypropene, stereospecific olefin polymerization |
| Link to License: | Terms of use |
Cite This
Files in this item
![[PDF]](/themes/Kops/images/mimes/pdf.png "PDF file"){kind=small}
RIEGER, Bernhard, Annette REINMUTH, Werner RÖLL, Hans-Herbert BRINTZINGER, 1993. Highly isotactic polypropene prepared with rac-dimethylsilyl-bis (2-methyl-4-t-butyl-cyclopentadienyl) zirconiumdichloride : an NMR investigation of the polymer microstructure. In: Journal of Molecular Catalysis. 82(1), pp. 67-73. ISSN 0304-5102. eISSN 1873-314X. Available under: doi: 10.1016/0304-5102(93)80071-2
@article{Rieger1993Highl-24154, title={Highly isotactic polypropene prepared with rac-dimethylsilyl-bis (2-methyl-4-t-butyl-cyclopentadienyl) zirconiumdichloride : an NMR investigation of the polymer microstructure}, year={1993}, doi={10.1016/0304-5102(93)80071-2}, number={1}, volume={82}, issn={0304-5102}, journal={Journal of Molecular Catalysis}, pages={67--73}, author={Rieger, Bernhard and Reinmuth, Annette and Röll, Werner and Brintzinger, Hans-Herbert} }
<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/24154"> <dc:creator>Rieger, Bernhard</dc:creator> <dc:creator>Brintzinger, Hans-Herbert</dc:creator> <dc:contributor>Brintzinger, Hans-Herbert</dc:contributor> <dc:rights>terms-of-use</dc:rights> <dcterms:title>Highly isotactic polypropene prepared with rac-dimethylsilyl-bis (2-methyl-4-t-butyl-cyclopentadienyl) zirconiumdichloride : an NMR investigation of the polymer microstructure</dcterms:title> <dcterms:issued>1993</dcterms:issued> <dc:contributor>Röll, Werner</dc:contributor> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-08-23T11:53:49Z</dc:date> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-08-23T11:53:49Z</dcterms:available> <dcterms:bibliographicCitation>Journal of Molecular Catalysis ; 82 (1993), 1. - S. 67-73</dcterms:bibliographicCitation> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dc:contributor>Reinmuth, Annette</dc:contributor> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/24154/2/Brintzinger_241545.pdf"/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:language>eng</dc:language> <dcterms:abstract xml:lang="eng">Isotactic polypropene was prepared using rac-dimethyl-silylbis(2-methyl-4-t-butyl-cyclopentadienyl) zirconiumdichloride (1) and methylalumoxane (MAO) at temperatures between 0 and 80°C and with Al/Zr ratios of 300 and 1500. The polymers, prepared at temperatures below 30°C had melting points of 162°C and above. The chain ends were determined by means of distortionless enhancement by polarization transfer (DEPT)-NMR spectroscopy. The pentad intensities were corrected according to the chemical shifts of the end groups. The intensity distributions are shown to arise from enantiomorphic site control of the chiral catalyst species.</dcterms:abstract> <dc:creator>Röll, Werner</dc:creator> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/24154"/> <dcterms:rights rdf:resource="https://kops.uni-konstanz.de/page/termsofuse"/> <dc:creator>Reinmuth, Annette</dc:creator> <dc:contributor>Rieger, Bernhard</dc:contributor> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/24154/2/Brintzinger_241545.pdf"/> </rdf:Description> </rdf:RDF>
Downloads since Oct 1, 2014 (Information about access statistics)
| Brintzinger_241545.pdf | 270 |
This item appears in the following Collection(s)
Search KOPS
Browse
My Account
