Publication
Active center determination of ethylene polymerisation catalysts using a quenching method with tritiated methanol
| dc.contributor.author | Justino, Jorge | |
| dc.contributor.author | Dias, A.R. | |
| dc.contributor.author | Tait, J.P. | |
| dc.date.accessioned | 2023-09-08T15:20:27Z | |
| dc.date.available | 2023-09-08T15:20:27Z | |
| dc.date.issued | 1995-09 | |
| dc.description.abstract | The subject of this work is ethylene polymerisation using Kaminsky type catalysts: Cp2MR2=methylaluminoxane [M=Zr,W,Nb; R=Cl,CH3]. Active center determination and kinetic studies of the (Cp2WCl2 + methylaluminoxane) and Cp2ZrCl2 + methylaluminoxane) systems are described, using a quenching method with tritiated methanol. The activity of the polymer was determined by liquid scintillation counting. We have found 0.5% and 87% of active centers, respectively for W and Zr system. The catalytic activity of complexes Cp2WCl2 and Cp2NbCl2 was compared with that of Cp2ZrCl2. The W and Nb complexes are found to be less active than the Zr complex. | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | Justino, J.A.; Dias, A.R. & Tait, J.P. (1995) Active center determination of ethylene polymerisation catalysts using a quenching method with tritiated methanol. Journal of Radioanalytical and Nuclear Chemistry, Articles, 195(2), 355–362. https://doi.org/10.1007/BF02035976 | pt_PT |
| dc.identifier.doi | https://doi.org/10.1007/BF02035976 | pt_PT |
| dc.identifier.issn | 0236-5731 | |
| dc.identifier.uri | http://hdl.handle.net/10400.15/4530 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Elsevier Science | pt_PT |
| dc.relation.publisherversion | https://link.springer.com/article/10.1007/BF02035976 | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt_PT |
| dc.subject | Ziegler-catalysts | pt_PT |
| dc.subject | polymerization | pt_PT |
| dc.subject | aluminoxane | pt_PT |
| dc.title | Active center determination of ethylene polymerisation catalysts using a quenching method with tritiated methanol | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 362 | pt_PT |
| oaire.citation.issue | 2 | pt_PT |
| oaire.citation.startPage | 355 | pt_PT |
| oaire.citation.title | Journal of radioanalytical and nuclear chemistry | pt_PT |
| oaire.citation.volume | 195 | pt_PT |
| person.familyName | Justino | |
| person.givenName | Jorge | |
| person.identifier.orcid | 0000-0003-3114-5926 | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isAuthorOfPublication | 3e483773-36b8-4a7b-82f3-c0a39f6a7fa9 | |
| relation.isAuthorOfPublication.latestForDiscovery | 3e483773-36b8-4a7b-82f3-c0a39f6a7fa9 |