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EnglishThe meso ansa zirconocene with dimethylsilyl bridge, activated by methylalumoxane, catalyses the ethylene polymerization, producing ethyl-branched polyethylene. With respect to the polymers obtained with the previously investigated meso zirconocenes, we have found higher branching amount and lower molecular weight. The rapid β-H transfer from the growing chain to the coordinated monomer could account for both these features of the polymer. The investigation on the structural parameters of the complex, through X-ray diffraction analysis, and on the electrophilicity of the cationic center, through NMR experiments, suggests, as a possible rationalization of this behavior, the obstruction in the inward site. © 2004 Elsevier B.V. All rights reserved.
| Autori: | |
| Data di pubblicazione: | 2005 |
| Titolo: | meso-Me2Si(1-indenyl)2ZrCl2/ methylalumoxane catalyzed polymerization of the ethylene to ethyl-branched polyethylene |
| Rivista: | JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL |
| Digital Object Identifier (DOI): | 10.1016/j.molcata.2004.12.002 |
| Codice identificativo ISI: | WOS:000227845200005 |
| Codice identificativo Scopus: | 2-s2.0-14644444175 |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-14644444175&doi=10.1016%2fj.molcata.2004.12.002&partnerID=40&md5=424c1d2c0b701ad7195ac97f2f4f3145 |
| Appare nelle tipologie: | Articolo su Rivista |
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