Influence of process parameters on ethylene-norbornene copolymers made by using [2,2′-methylenebis(1,3-dimethylcyclopentadienyl)]-zirconium dichloride and MAO

Boong Goon Jeong, Dae Woo Nam, Sung Don Hong, Si Geun Lee, Young Whan Park, Kwang Ho Song

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Ethylene-norbornene copolymerization was investigated by using metallocene catalysts, [2,2′-methylenebis(1,3-dimethylcyclopentadienyl)]zirconium dichloride(2,2′-CH2(1,3-Me2Cp)2ZrCl2 , Catalyst A) and racemic-ethylenebis(indenly)zirconium dichloride (rac-Et(Ind)2ZrCl2, Catalyst B), in the presence of methylaluminoxane as a cocatalyst. The influences of different process parameters such as polymerization temperature and ethylene pressure were studied by using a 56 wt% norbornene solution in toluene. The results show that Catalyst A has a higher activity in copolymerization than Catalyst B. Catalyst A also has a superior norbornene insertion performance to Catalyst B, resulting in polymers with higher glass transition temperatures, by approximately 70 °C, at similar polymerization conditions, indicative of a great commercial potential of Catalyst A.

Original languageEnglish
Pages (from-to)22-26
Number of pages5
JournalKorean Journal of Chemical Engineering
Volume20
Issue number1
DOIs
Publication statusPublished - 2003 Jan

Keywords

  • Ethylene-Norbornene Copolymerization
  • Glass Transition Temperature
  • Metallocene Catalysts

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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