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- W2030465203 abstract "Ethylene polymerization was carried out with diphenylmethylidene-(cyclopentadienyl)(fluorenyl)zirconium dichloride (Ph2C(Cp)(Flu)ZrCl2) activated with various activators such as methylaluminoxane (MAO), tetrakis(pentafluorophenyl)borates (R·B(C6F5)4, R=Me2PhNH, Ph3C, C7H7, H(Et2O)n), dimethylanilinium tetrakis(pentafluorophenyl)aluminate (Me2PhNH·Al(C6F5)4) and tris(pentafluorophenyl)borane (B(C6F5)3) to study the correlation between catalyst performance for ethylene polymerization and cocatalysts at high temperature. R·B(C6F5)4-activated catalysts showed relatively high activity but Al(C6F5)4-activated catalyst showed very low activity, presumably due to the low thermal stability. B(C6F5)3-activated catalyst also indicated low activity. This activity difference reflected the relative coordinative abilities of the anions and tightness of the ion-pairing. MAO-activated catalyst was comparable in activity and copolymerization reactivity with Me2PhNH·B(C6F5)4-activated catalyst and these two catalyst produced high molecular weight ethylene/1-hexene copolymers in a high pressure process." @default.
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- W2030465203 date "1999-12-01" @default.
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- W2030465203 title "Influence of activators on ethylene polymerization with diphenylmethylidene-(cyclopentadienyl)(fluorenyl)zirconium dichloride catalysts at high temperature" @default.
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