Highly active Ziegler-Nattta catalyst for propylene polymerization

S. Abedi, Majid Daftaribesheli, S. Shafiei

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

Polymerization of propylene was carried out by using a MgCl2-EtOH-TiCl4-ID-TEA-ED catalyst system in n-heptane, where ID (internal donor) was an organic diester, ED (external donor) was a silane compound, and TEA (triethyl aluminum) was the activator. The influences of temperature, pressure, time, hydrogen, and the molar ratios of Al/Ti and ED/Ti on polymer isotacticity and catalyst activity were studied by solubility in boiling n-heptane and measuring the polymer produced, respectively. The morphology of the polymers was evaluated through scanning electron microscopy and particle size distribution. The rheological properties of the poly(propylene) were determined by the melt flow index. It was found that the catalyst showed good morphology and high activity and also the produced polymers were characterized by high isotacticity and globulelike shapes.
Original languageEnglish
Pages (from-to)1744-1749
Number of pages6
JournalJournal of applied polymer science
Volume97
Issue number4
DOIs
Publication statusPublished - 2005

Keywords

  • isotactic
  • Catalysts
  • Morphology
  • IR-61494
  • poly(propylene) (PP)
  • METIS-230187
  • Ziegler-Natta Polymerization

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