Synthesis of tailor-made polyethylene through the control of polymerization conditions using selectively combined metallocene catalysts in a supported system

✍ Scribed by Jung Dae Kim; João B. P. Soares; Garry L. Rempel

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 222 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990201)37:3<331::aid-pola10>3.0.co;2-v

✦ Synopsis

Tailoring of the molecular weight distribution (MWD) in ethylene polymerization was attempted by selectively combining different types of metallocene catalysts onto a single support. The catalyst produced by supporting Et[Ind] 2 ZrCl 2 and Cp 2 HfCl 2 onto a single MAO pretreated silica support was able to produce polymers with unimodal or bimodal MWD's. This approach permits the synthesis of polyethylene with different MWD's using the same catalyst as a function of the polymerization conditions.