As highlighted before our colleague Lukas Göpperl published a paper with the title `Impact of Polymerization Process Parameters on Improved Comonomer Incorporation Behavior in Ziegler-Natta Catalysis, opens an external URL in a new window´ in the Journal of Macro-Molecular Reaction Engineering. Now this paper was chosen to grace the cover of this journal.
"Ziegler-Natta based co-polymerization processes generally give rise to a non-uniform incorporation distribution of the comonomer. Lowering the titanation temperature during catalyst synthesis can help to counteract this effect. Using these changes in the catalyst synthesis route and by applying carefully selected polymerization conditions, it can be shown that a more uniform incorporation distribution of the comonomer can be achieved."
Congratulations Lukas !
Our colleagues Raphaela Süss, Lukas Zeilerbauer, and Christian Paulik published a new article with the title `Homogeneously catalyzed depolymerization of lignin
from organosolv medium: Characterization, optimization, and minimization of coke formation´ in the Canadian Journal Of Chemical Engineering (DOI: 10.1002/cjce.24055, Accepted: 18 December 2020).
This study focused on maximizing yields of oligomeric and monomeric products while minimizing coke formation in the depolymerization of lignin from an organosolv medium. A design of experiments (DoE) with temperature, time, and ethanol-water ratio as factors was established and tested. Optimized reaction conditions were found at 185.4C with 7.5 wt% sodium hydroxide as catalyst, an ethanol-water ratio of 48.6% (v/v), and a residence time of
30 minutes. With these optimized parameters, maximum monomer and oligomer yields of 9.4 wt% and 86.2 wt% and minimized coke formation of 0.5 wt% were achieved. The oligomeric and monomeric products were characterized by GPC, GC-MS, and OH-group determination (Folin-Ciocalteu).
Current research in the CTO group at the Johannes Kepler University Linz focuses on a wide range of organic synthesis of industrial relevance. Especially complex macromolecular architectures with selected functionality and composition via radical and coordination polymerization protocols are of interest. Other points of interest are additive chemistry, renewable resources and process safety. Our research interests are mainly at the interface of organic and polymer chemistry, with particular focus on industrial applications.
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Institute for Chemical Technology of Organic Materials
Johannes Kepler Universität Linz
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For studies affairs and general information please contact: firstname.lastname@example.org
If you are looking for a master, PhD or bachelor thesis, don´t hesitate to contact us. At the moment we are looking for master students to support our cooperations with companies such as: Borealis, Miba and Krajete.
For details on topics for bachelor, master or PhD thesis, please contact:
Univ.-Prof. DI Dr. Christian Paulik, opens in new window, Associate Prof. DI Dr. Clemens Schwarzinger, opens in new window or DI Dr. Klaus Bretterbauer, opens in new window.
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