De-Brominating Flame-Retardant Polystyrene by Utilizing Basic Oxides in Chemical Recycling

Title data

Kolb, Tristan ; Schedl, Andreas ; Kerschbaumer, Hannes ; Niessner, Norbert ; Schmidt, Hans-Werner ; Wilhelmus, Bianca:
De-Brominating Flame-Retardant Polystyrene by Utilizing Basic Oxides in Chemical Recycling.
In: Chemie Ingenieur Technik. Vol. 95 (2023) Issue 8 . - pp. 1314-1322.
ISSN 1522-2640
DOI: https://doi.org/10.1002/cite.202200196

Official URL:

Abstract in another language

Chemical recycling is a method to close the recycling loop for polymers. This is particularly applicable for polystyrene (PS), where the monomer styrene is directly formed by depolymerization and subsequently utilized for the production of new PS. However, some waste sources contain critical additives as legacies, such as brominated flame retardants. There is a profound need to remove these substances from the material, as current thresholds do not allow such additives above certain limits in new products. In this work we present the beneficial use of basic oxides during the thermal depolymerization of a mixture of PS and 1,2,5,6,9,10-hexabromocyclododecane. It was demonstrated that especially barium oxide and calcium oxide allowed the reduction of bromine up to 96 % in the crude styrene oil.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Brominated flame retardants; Chemical recycling; Depolymerization; Polystyrene
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt Profile Fields > Advanced Fields > Polymer and Colloid Science
Result of work at the UBT:	No
DDC Subjects:	500 Science > 500 Natural sciences 500 Science > 540 Chemistry
Date Deposited:	10 Jun 2024 08:15
Last Modified:	10 Jun 2024 08:15
URI:	https://eref.uni-bayreuth.de/id/eprint/89697