Ethylene polymerization initiated by SiO2-supported neodymocene catalysts

✍ Scribed by Jizhu Jin; Toshiya Uozumi; Kazuo Soga

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 232 KB
• Volume: 16
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.1995.030160414

✦ Synopsis

Some SiO,-supported neodymocene catalysts were prepared and polymerization of ethylene was conducted with them using alkylaluminiums, methylaluminoxane (MAO), BuLi and Bu MgEt (Bu: butyl, Et: ethyl) as cocatalysts. The lifetime of these catalysts was found to be very long. Catalytic activity as well as molecular weight of the produced polymer are strongly dependent upon kind and amount of cocatalyst used. With increasing polymerization temperature, the activity increases monotonously up to 80°C. The use of BuMgEt and Al(i-C,H,), as cocatalyst gives the highest activity and highest molecular weight, respectively.