Polymerization of olefins through heterogeneous catalysis. XIII. The influence of comonomer in the solution copolymerization of ethylene

✍ Scribed by Isam A. Jaber; W. Harmon Ray

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 941 KB
• Volume: 49
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1993.070491003

✦ Synopsis

The copolymerization of ethylene with highly active TiC14/ MgC12-supported catalysts in solution reactors at 185°C and 400 Psig pressure is presented. The performance of these highly active supported catalysts at high reaction temperature is characterized by a high initial rate that decays rapidly within the 10 min polymerization time period. In the presence of hydrogen and a comonomer, catalyst yields up to about 300 kg/g ( T i ) are achieved. Kinetic data obtained on the influence of a comonomer, e.g., 1-octene or 1-hexene, indicate rate enhancement when used in moderate concentrations. Higher concentrations of comonomer result in a decreasing rate of ethylene consumption. Comonomer/ethylene molar ratios in the range 0-0.827 resulted in comonomer incorporation up to about 2.6 mol % and a small reduction in the polymer molecular weight.