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Catalysis Letters

, Volume 109, Issue 3–4, pp 147–152 | Cite as

The Role of CaO in the Ziegler–Natta Catalyst for Propylene Polymerization

  • Kitti Tangjituabun
  • Bunjerd Jongsomjit
  • Piyasan PraserthdamEmail author
Article

A certain amount of CaO enhanced the activity of Ziegler–Natta catalyst during propylene polymerization, but decreased isotacticity. The results indicated that CaO accelerated the initial polymerization rates and improved catalyst against deactivation without effects on melting point, crystallinity and morphology of polypropylene. The electron spin resonance (ESR) results revealed that CaO facilitated the reduction of Ti4+ species.

Keywords

Ziegler–Natta catalyst CaO MgCl2 ESR polymerization 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Kitti Tangjituabun
    • 1
  • Bunjerd Jongsomjit
    • 1
  • Piyasan Praserthdam
    • 1
    Email author
  1. 1.Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of EngineeringChulalongkorn UniversityBangkokThailand

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