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nature : non-homogeneous catalyst. From Titanium Tetrachloride and alkyl aluminum components. Reaction Mechanism : catalytic active site is a four chlorine ligand and an alkyl ligand titanium is octahedral coordination compounds, a coordinated air and pulling is the first reaction olefin occupy space with the metal coordination, and then alkyl migration of olefin insertion reaction, a four centers generated a transition state extension the long alkyl chain, also formed a coordination space is olefin coordination, the process so repetitive, it is generally from I to III of the main group metal alkyl compounds, and HG halide with Article IV to VII group consisting of transition metal salts, through coordination and catalytic role in history Ethylene, Propylene and other olefin polymerization catalysts are called Ziegler-Natta catalysts. Catalyst will enable the use of such low-pressure ethylene polymerization in a high crystallinity and high melting point of polyethylene. Such catalysts for propylene, not only in the low-pressure polymerization conducted, but the main legislation for the whole of the same configuration of polypropylene and a small amount of random texture of legislation polypropylene, a polymer greatly enhance physical and mechanical properties. This Ziegler Natta shared with the 1963 Nobel Prize in Chemistry.
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