Polypropylene (PP) prepared with the MgC1z/TiC1,-A1Et3/PhzSi(OMe)2 catalyst system was fractionated by a preparative temperature rising elution fractionation (TREF) technique in the wide temperature range of room temperature to 13OoC. The results of fractionation showed that there were plural active
Heterogeneity of active sites of Ziegler-Natta catalysts: The effect of catalyst composition on the MWD of polyethylene
β Scribed by Marina I. Nikolaeva; Tatiana B. Mikenas; Mikhail A. Matsko; Ludmila G. Echevskaya; Vladimir A. Zakharov
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 243 KB
- Volume
- 115
- Category
- Article
- ISSN
- 0021-8995
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## Abstract Poly(propylene) samples produced by heterogeneous ZieglerβNatta catalysts containing different internal electron donors were fractionated by using temperature rising elution fractionation; some key fractions were analyzed with ^13^C NMR. It was found that internal electron donors with d
The effect of different cocatalysts in slurry phase polyethylene production using a high active Ziegler/Natta catalyst precursor was studied under different polymerization start-up methods. The study revealed that diffusion of cocatalyst molecules through produced polymer to reach potential active s
We are grateful to funds from the Ministerium fΒΈr Wissenschaft und Forschung, NRW, the Deutsche Forschungsgemeinschaft, the Max-Planck-Gesellschaft, and the Fonds der Chemischen Industrie.