Styrene stereospecific catalysis by alkyl substituted titanocenes of the type (RCp)(2)TiCl2
| Autor: | Pereira, BCD, Klein, S. I., Dias, M. L. |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal do Rio de Janeiro (UFRJ) |
| Jazyk: | portugalština |
| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2020-12-10T18:00:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-01-01 A series of seven alkyl substituted complexes of the type (RCp)(2) TiCl2 (R =H, ethyl, n-propyl, iso-propyl, n=butyl, iso-amyl, ciclo-hexyl) was prepared, as well as the novel compound with R = sec-butyl, and the effects of the substituent on the polymerisation of styrene was investigated at the temperatures of 0 and 50 degreesC. It was found that R = n=butyl maximises the production of syndiotactic polystyrene. Alkyl ligands with R = RCH2- are superior to those with R = RR'CH- and to the precursor Cp2TiCl2 in the production of high molecular weight syndiotactic polystyrene. UNESP, Inst Quim Araraquara, Dept Quim Geral & Inorgan, BR-14800900 Araraquara, SP, Brazil UFRJ, IMA, Inst Macromol Profa Eloisa Mano, BR-21945970 Rio De Janeiro, Brazil UNESP, Inst Quim Araraquara, Dept Quim Geral & Inorgan, BR-14800900 Araraquara, SP, Brazil |
| Databáze: | OpenAIRE |
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