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Polymer Bulletin
Erschienen in: Polymer Bulletin 9/2011

01.12.2011 | Original Paper

Effects of Ti oxidation state on ethylene, 1-hexene comonomer polymerization by MgCl2-supported Ziegler–Natta catalysts

verfasst von: Nichapat Senso, Piyasan Praserthdam, Bunjerd Jongsomjit, Toshiaki Taniike, Minoru Terano

Erschienen in: Polymer Bulletin | Ausgabe 9/2011

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Abstract

In this study, the influences of the Ti oxidation state on the catalytic properties of MgCl2-supported Ziegler–Natta catalysts in ethylene homo- and co-polymerization with 1-hexene were investigated. Three catalysts having different Ti oxidation states were synthesized by milling TiCl4, TiCl3, or TiCl2 together with MgCl2. With these catalysts having different Ti oxidation states, the polymerization conditions such as the Al concentration, temperature, and 1-hexene concentration were varied to figure out their catalytic abilities in ethylene homo- and co-polymerization. The Ti oxidation state affected the catalyst activity largely, having unique dependences on the polymerization conditions. A higher oxidation state led to a higher activity, slightly larger comonomer incorporation, and lower molecular weight as well as its narrower distribution. However, rough characteristics of copolymers were similar among the different Ti oxidation states.
Vorheriger Artikel Viscoelastic, thermal, and morphological analysis of HDPE/EVA/CaCO3 ternary blends
Nächster Artikel Nanocomposites of PLA/PP blends based on sepiolite

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Metadaten
Titel
Effects of Ti oxidation state on ethylene, 1-hexene comonomer polymerization by MgCl2-supported Ziegler–Natta catalysts
verfasst von
Nichapat Senso
Piyasan Praserthdam
Bunjerd Jongsomjit
Toshiaki Taniike
Minoru Terano
Publikationsdatum
01.12.2011
Verlag
Springer-Verlag
Erschienen in
Polymer Bulletin / Ausgabe 9/2011
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-011-0610-0

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