Metallocenes in ethylene polymerization studied by cyclic and differential pulse voltammetry

Autor:	Fernando Lang da Silveira, João Henrique Zimnoch dos Santos, Lílian M.T. Simplício, Zênis Novais da Rocha
Rok vydání:	2008
Předmět:	chemistry.chemical_compound Ethylene chemistry Polymerization Process Chemistry and Technology Polymer chemistry Methylaluminoxane Differential pulse voltammetry Polyethylene Cyclic voltammetry Post-metallocene catalyst Metallocene Catalysis
Zdroj:	Applied Catalysis A: General. 344:98-106
ISSN:	0926-860X
DOI:	10.1016/j.apcata.2008.04.006
Popis:	The relationship between redox characteristics and catalytic activity in ethylene polymerization, with methylaluminoxane (MAO) as the cocatalyst, was evaluated for a series of homogeneous metallocenes (Cp2ZrCl2, (MeCp)2ZrCl2, (nBuCp)2ZrCl2, (iBuCp)2ZrCl2, (tBuCp)2ZrCl2, Cp2TiCl2, Cp2HfCl2, Et(Ind)2ZrCl2, Et(IndH4)2ZrCl2 and MeSi2(Ind)2ZrCl2). Catalytic activity is discussed in terms of the coordination sphere and metal center of the metallocene and compared with their electrochemical behavior in the presence of ethylene and MAO. The resulting polyethylenes were analyzed by GPC. The catalytic activity in the ethylene polymerization reaction is discussed in terms of half-life (t1/2) and electrochemical gap of the metallocene species.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::169133b2ba041ed0094427ede9e507d2 https://doi.org/10.1016/j.apcata.2008.04.006 Zobrazit plný text záznamu Full Text from ScienceDirect