Effect of carrier nature and monomer pressure on polymerization of ethylene with high activity catalyst system

• Published in: Polymer bulletin (Berlin, Germany) Vol. 44; no. 2; pp. 203 - 208
• Main Authors: VELIKOVA, M, DAMYANOV, D
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.03.2000; Berlin Springer Nature B.V; New York, NY
• Subjects: Applied sciences; Catalysts; Ethylene; Exact sciences and technology; Mechanical properties; Monomers; Organic polymers; Physicochemistry of polymers; Polymerization; Preparation, kinetics, thermodynamics, mechanism and catalysts; Pressure effects; Silicon dioxide; Stoichiometry; Polyethylene; Composition effect; Magnesium Organic compounds; Complex catalyst polymerization; Experimental study; Reaction rate; Silica; Supported catalyst; Titanium IV Chlorides; Pressure effect; Aluminium Organic compounds; Kinetic parameter; Catalyst activity
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s002890050593

SummaryThe effects of monomer pressure, texture of amorphous SiO2 carrier used and stoichiometry of surface titanium complexes on the profile of the kinetic curves obtained by polymerization of ethylene with high activity catalyst system TiCl4/SiO2-(C2H5)2AlCl-(C4H9)1.5(C8H17)0.5Mg were studied. It was found that constant polymerization rate was reached for different times but their values did not depend on pressure and carrier used. The results obtained suggest that surface complexes with mole ratio Cl−/Ti4+=2 generate higher number of active centers and higher polymerization rate. A relationship between kinetic studies and productivity, microstructure of polymers synthesized and their physico-mechanical properties is shown.