Olefin-Based Homo- and Copolymers obtained by Catalytic Gas-phase, Slurry and Emulsion Polymerization
Zusammenfassung der Projektergebnisse
The project led to numerous approaches towards the control of the polymer structures and of the product morphology in polyolefin polymerization. For the first time, it was possible to synthesize “block” copolymers incorporating 1-undecene and propene blocks using the strategy of sequential monomer addition. It was shown that synthesized comb-like structures are suitable for the design of new functional polymers with well-defined polarity, functionality and degradability. These polymers have the potential to improve surface and interface properties of polyolefins and are also promising candidates for application as compatibilizers for inorganic nanoparticles. Furthermore, the in situ metallocene polymerization of propene in presence of special synthesized filler with Kanemite structure resulted in the preparation of polypropylene nanocomposites with remarkably superior degree of exfoliation of the filler. In addition, it was shown that the use of specially designed supports offers new pathways to spherical and fibrous polyolefin. Easily accessible porous particles can serve as versatile supports of various metallocenes and postmetallocenes. Using fibers as support leads to PE fibers which can be used in membranes or in composites. Loading different adjusted catalysts on supports results in the synthesis of LLDPE as ethylene is oligomerized to short olefins which are incorporated in a PE chain. Using of hollow spheres and emulsion droplets allows for the polymerization of olefins in a confined geometry, which offers new opportunities for the achieving the size control in olefin polymerizations. Overall the achieved results clearly demonstrate the importance of combining experts in the area of supports, catalyst design and polymerization processes.
Projektbezogene Publikationen (Auswahl)
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Oil-in-Oil-Emulsions: Tailor-Made Amphipolar Emulsifier Amphiphiles: Molecular Assembly and Applications. American Chemical Society (2011), pp. 91-104
Michael S. Hoffmann, Robert Haschick, Markus Klapper, Klaus Müllen
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Thermal Properties and Crystalline Structure of Poly(10-undecene-1-ol). Eur. Polym. J. 47 (2011) 1124-1134
Matthias Johannsen, Ulrich Schulze, Dieter Jehnichen, Liane Häußler, Brigitte Voit
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Synthesis of Allyl-Terminated Polar Macromonomers by Metallocene-Catalyzed Polymerizations of 10-Undecene-1-ol. Macro Letters 1 (2012) 352-355
Matthias Johannsen, Ulrich Schulze, Karin Sahre, Hartmut Komber, Brigitte Voit
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Anisotropic Supports in Metallocene-Catalyzed Polymerizations: Templates to Obtain Polyolefin Fibers. Macromol. Mater. Eng. 299 (2014), 1155-62
Daejune Joe, Florian E. Golling, Kathrin Friedemann, Daniel Crespy, Markus Klapper, Klaus Müllen
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Metallocene Supported on Porous and Nonporous Polyurethane Particles for Ethylene Polymerization. J. Polym. Sci., Part A: Polym. Chem. 52 (2014), 450-59
Robert Dorresteijn, Sven Nietzel, Daejune Joe, Yi Gerkmann, Gerhard Fink, Markus Klapper, Klaus Müllen
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Olefin Polymerization with Supported Catalysts as an Exercise in Nanotechnology. Chem. Mater. 26 (2014), 802-19
Markus Klapper, Daejune Joe, Sven Nietzel, Joseph W. Krumpfer, Klaus Müllen
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Synthesis and characterization of comb-like copolymers based on poly(εcaprolactone) and poly(α-olefin). Macromol. Chem. Phys. 215 (2014) 733-741
Sabina Kinder, Hartmut Komber, Dieter Jehnichen, Liane Häussler, Frank Böhme, Mazen Garaleh, Doris Pospiech, Brigitte Voit, Ulrich Schulze
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Poly(Isobutylene) Nanoparticles Via Cationic Polymerization in Nonaqueous Emulsions. Macromol. Rapid Commun. 36 (2015), 204-10
Thomas Schuster, Florian E. Golling, Joseph W. Krumpfer, Manfred Wagner, Robert Graf, Abdulhamid A. Alsaygh, Markus Klapper, Klaus Müllen
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Spectroscopic Examinations of Hydrogen Bonding in Hydroxy-Functionalized ADMET Chemistry. Macromol. Rapid Commun. 36 (2015) 60−64
Donovan L. Thompson , Kenneth B. Wagener, Ulrich Schulze , Brigitte Voit, Dieter Jehnichen, Mikhail Malanin
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Synthesis of Nanocomposites by in situ Metallocene-Catalyzed Polymerization of Propene Eur. Polym. J. 51(2015)
Sabina Zakrzewska, Aline. C. dos Ouros, Nicole Schramm, Dieter Jehnichen, Liane Häussler, Doris Pospiech, Brigitte Voit, Ulrich Schulze, Heloise. O. Pastore
