Polymerization of ethylene with the (C5H5)4Zr-methylaluminoxane soluble catalytic system

Autor:	G. P. Startseva, P. E. Matkovskii, I. V. Sedov, Yu. I. Zlobinskii, V. D. Makhaev, Sergey M. Aldoshin, L. N. Russiyan
Rok vydání:	2007
Předmět:	Chain propagation Ethylene Polymers and Plastics Methylaluminoxane Post-metallocene catalyst Toluene Catalysis Hexane chemistry.chemical_compound Polymerization chemistry Polymer chemistry Materials Chemistry Ceramics and Composites Nuclear chemistry
Zdroj:	Polymer Science Series B. 49:85-90
ISSN:	1555-6123 1560-0904
Popis:	The effects of catalyst concentration, Al-to-Ti molar ratio, hydrogen additives, and time of aging of catalyst components on the kinetic features of ethylene polymerization in the presence of the (C5H5)4Zr-methylaluminoxane soluble catalytic system in toluene and hexane at 60°C and an ethylene pressure of 0.6 MPa have been studied. It has been demonstrated that the highest activity and productivity of the title system is achieved in the presence of 0.9% H2 in the gas phase of a reactor (2180 kg PE/(g Zr h)). When polymerization is carried out in hexane, the rate constant of chain propagation is lower by a factor of ∼1.5 than that in the case of toluene and the catalytic system is characterized by a long lifetime.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::208a6e00930212e31f24ed431505b1d6 https://doi.org/10.1134/s1560090407030074 Zobrazit plný text záznamu Full text from SpringerLink