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Continuous Chemical Recycling of Polystyrene with a Twin - Screw Extruder

Title data

Schäfer, Philipp ; Hopmann, Christian ; Facklam, Martin ; Hollerbach, Laura ; Kolb, Tristan ; Schedl, Andreas ; Schmidt, Hans-Werner ; Nosić, Franziska ; Wilhelmus, Bianca:
Continuous Chemical Recycling of Polystyrene with a Twin - Screw Extruder.
In: Hopmann, Christian ; Dahlmann, Rainer (ed.): Advances in Polymer Processing 2020 : Proceedings of the International Symposium on Plastics Technology. - Berlin, Heidelberg : Springer Vieweg , 2020 . - pp. 37-49
ISBN 978-3-662-60809-8

Project information

Project title:
Project's official titleProject's id
Research for Sustainable DevelopmentNo information

Project financing: Bundesministerium für Bildung und Forschung

Abstract in another language

The increasing scarcity of resources and growing environmental awareness require higher recycling rates for plastic waste. Common techniques to do that are mechanical recycling, thermal recycling and chemical recycling, which is also called feedstock recycling. From all three techniques, chemical recycling is the only one which can produce new materials that correspond to the quality of conventional virgin material. However, the technique is limited to suitable polymers, e.g. polystyrene, which can be depolymerised at elevated temperatures. For an efficient industrial scale-up, a continuous process is desirable. In our work, we present such a continuous process for the recycling of polystyrene from post-industrial waste. A co-rotating, tightly intermeshing twin-screw extruder in high-temperature design is used together with a vacuum separation system with three degassing openings. By determining a stable process point a continuous depolymerisation of polystyrene is technically realised.

Further data

Item Type: Article in a book
Refereed: No
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Advanced Materials
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 540 Chemistry
Date Deposited: 11 Dec 2020 09:26
Last Modified: 11 Dec 2020 09:31
URI: https://eref.uni-bayreuth.de/id/eprint/61001