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  Organic Nanoparticles as Fragmentable Support for Ziegler-Natta Catalysts

Nietzel, S., Joe, D., Krumpfer, J. W., Schellenberger, F., Alsaygh, A. A., Fink, G., et al. (2015). Organic Nanoparticles as Fragmentable Support for Ziegler-Natta Catalysts. Polymer Chemistry, 53(1), 15-22. doi:10.1002/pola.27442.

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 Creators:
Nietzel, Sven1, Author              
Joe, Daejune1, Author              
Krumpfer, Joseph W.1, Author              
Schellenberger, Frank2, Author              
Alsaygh, Abdulhamid A.3, Author
Fink, Gerhard4, Author              
Klapper, Markus1, Author              
Muellen, Klaus1, Author              
Affiliations:
1Dept. Müllen: Synthetic Chemistry, MPI for Polymer Research, Max Planck Society, ou_1800289              
2Dept. Butt: Physics at Interfaces, MPI for Polymer Research, Max Planck Society, ou_1800286              
3King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia, ou_1800286              
4Research Department Fink, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445583              

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Free keywords: fragmentation; heterogeneous ethylene polymerization; molecular weight distribution; supports; Ziegler-Natta polymerization
 Abstract: A fragmentable support material for Ziegler-Natta catalysts is presented based on micrometer-sized aggregates of polystyrene nanoparticles. Hydroxyl anchoring groups are introduced by copolymerization of hydroxymethylstyrene in emulsion process to immobilize the catalysts. The catalytic activity in ethylene slurry polymerizations is found to be directly correlated to the hydroxyl group content of the supports. Furthermore, the fragmentation behavior of dye-labeled support aggregates into the initial nanoparticles is demonstrated using laser scanning confocal fluorescence microscopy as a nondestructive method. These supported catalysts fulfill two important design criteria, high fragmentability and high catalyst loading, and produce high-density polyethylene with medium molecular weight distributions (MWDs=3-4). These values lie between those obtained using single-site metallocene-based (narrow MWD<3) or inorganic supported multi-site Ziegler-Natta-based (broad MWD=4-12) polymerizations without the need of blending

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Language(s): eng - English
 Dates: 2014-10-292015-01-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/pola.27442
 Degree: -

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Title: Polymer Chemistry
  Abbreviation : Polym. Chem.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 53 (1) Sequence Number: - Start / End Page: 15 - 22 Identifier: ISSN: 1759-9954
CoNE: https://pure.mpg.de/cone/journals/resource/1759-9954