Stereochemical Structure of Polypropylene Obtained in the Presence of Half-Sandwich Titanium Complexes
| Autor: | Carla Zannoni, Zsolt Csók, Irene Sessa, Dario Liguori, Adolfo Zambelli |
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| Rok vydání: | 2004 |
| Předmět: |
Polypropylene
Polymers and Plastics Organic Chemistry chemistry.chemical_element Concentration effect Solution polymerization Condensed Matter Physics Propene chemistry.chemical_compound Polymerization chemistry Tacticity Polymer chemistry Materials Chemistry Physical and Theoretical Chemistry Thermoplastic elastomer Titanium |
| Zdroj: | Macromolecular Chemistry and Physics. 205:1231-1237 |
| ISSN: | 1521-3935 1022-1352 |
| DOI: | 10.1002/macp.200400138 |
| Popis: | The polymerization of propene in the presence of CpTi(CH 3 ) 3 /B(C 6 F 5 ) 3 , at low temperature, affords prevailingly syndiotactic elastomeric polypropylene. In the presence of methylalumoxane (MAO) and under the same polymerization conditions, both CpTi(CH 3 ) 3 and CpTiCl 3 afford elastomeric polypropylene with a stereochemical structure ranging from prevailingly syndiotactic to prevailingly isotactic, depending on the concentration of MAO. A tentative rationalization of these results is provided. |
| Databáze: | OpenAIRE |
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