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Specific Structures Enabled by Metallocene Catalysis in Polyethenes

  • Barbro LöfgrenEmail author
  • Esa Kokko
  • Jukka Seppälä
Part of the Advances in Polymer Science book series (POLYMER, volume 169)

Abstract

This chapter briefly describes the history of metallocene polymerisation catalysts. The behaviour of metallocenes, particularly in copolymerisation of ethene with higher linear α-olefins is discussed. A class of olefin polymerisation catalysts based on siloxy-substituted bis(indenyl) metallocenes is reported. These ligand systems offer efficient opportunities for copolymerisation of ethene with heteroatoms containing monomers and traditional α-olefins. In addition, the formation of long-chain branching, attributed to copolymerisation of vinyl terminated polyethenes, is discussed. Examples of siloxy-substituted bis(indenyls) with high copolymerisation capability and high vinyl selectivity are highlighted.

Keywords

Siloxy-substituted metallocenes Long-chain branching Rheological properties Comonomer response Vinyl selectivity 

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Authors and Affiliations

  1. 1.Polymer Technology, Polymer Science Centre Helsinki University of Technology 02015 HUTFinland

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