FTIR studies of titanium tetrachloride and magnesium dichloride complexes with aromatic esters relevant to Ziegler-Natta catalysts

Kjell-Arne Solli; Martin Ystenes; Piotr Sobota

doi:10.1117/12.56328

1 March 1992 FTIR studies of titanium tetrachloride and magnesium dichloride complexes with aromatic esters relevant to Ziegler-Natta catalysts

Kjell-Arne Solli, Martin Ystenes, Piotr Sobota

Author Affiliations +

Proceedings Volume 1575, 8th Intl Conf on Fourier Transform Spectroscopy; (1992) https://doi.org/10.1117/12.56328
Event: Eighth International Conference on Fourier Transform Spectroscopy, 1991, Lubeck-Travemunde, Germany

Abstract

Esters of aromatic carboxylic acids and dicarboxylic acids show different effects when used as electron donors in the synthesis of milled MgCl2-supported Ziegler-Natta catalysts. Such Ziegler-Natta catalysts are synthesized by cogrinding anhydrous MgCl2 with the ester, then reacting the resulting support with TiCl4 followed by washing and drying. Alternatively, the catalyst may be synthesized by cogrinding MgCl2 with a TiCl4- aromatic ester complex. The catalyst is activated by a trialkyl aluminum in order to polymerize propene or other (alpha) -alkenes. Esters of the monoacids generally enhance the activity of the catalyst (relative to no ester), and the produced polypropene is also more isotactic. Esters of the diacids also enhance the isotacticity of the polymer produced somewhat, but the activity of the catalyst is lower.

Citation Download Citation

Kjell-Arne Solli, Martin Ystenes, and Piotr Sobota "FTIR studies of titanium tetrachloride and magnesium dichloride complexes with aromatic esters relevant to Ziegler-Natta catalysts", Proc. SPIE 1575, 8th Intl Conf on Fourier Transform Spectroscopy, (1 March 1992); https://doi.org/10.1117/12.56328

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