Spatial Distribution of Ti Species in MgCl2 Particles and its Effect on the Properties of Industrial Ziegler-Natta Catalyst

DOI 8 References

Bibliographic Information

Other Title
  • 工業用ＭｇＣｌ２担持型Ｚｉｅｇｌｅｒ‐Ｎａｔｔａ触媒におけるＴｉ種の粒子内分布と触媒特性との相関

Abstract

In this study, we clarified the effects of the preparation methods of TiCl4/Internal donor/MgCl2 propylene polymerization catalysts on the structure of the active site and particle morphology, active sites nature and their dispersion in the particle. The morphology of the original catalyst and their produced polypropylene particles were studied by direct scanning electron microscopy and particle size distribution analysis. Stopped-flow polymerization technique in combination with crystallinity distribution analysis of the obtained polymers was used for kinetic analysis. It was shown that the polymer particle morphology and their fragmentation/growth were controlled by the spatial distribution of active Ti species in the catalyst particle, which was different among catalyst preparation methods. Even the polymer morphology directly depends on the type of catalyst particle. Even though the catalyst preparation method hardly affects the molecular structures of active sites, the ratio of two isospecific catalytic sites in the catalyst was dependent on the preparation method.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 68 (7), 473-478, 2011

    The Society of Polymer Science, Japan

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Details 詳細情報について

  • CRID
    1390282681501075584
  • NII Article ID
    130004489338
  • DOI
    10.1295/koron.68.473
  • ISSN
    18815685
    03862186
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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