PROCESS FOR THE POLYMERIZATION OR COPOLYMERIZATION OF ETHYLENE

摘要

In gas phase polymerizations and copolymerizations of ethylene, regents or cofeeds control the molecular weight, expressed as MI (wherein MI is measured according to ASTM D-1238 Condition E), of the resin product. Use of isopentane and electron donating compounds reduce MI; whereas, water and electron withdrawing compounds increase MI.