fulltext.pdf 413 KB
A method to recover both Br and Br-free plastic from brominated flame retardant high impact polystyrene (HIPS-Br) was proposed. HIPS-Br containing 15% Br was treated in autoclave at 280℃ using water or KOH solution of various amounts and concentrations. Hydrothermal treatment (30 ml water) leads to 90% debromination of 1 g HIPS-Br but plastic is strongly degraded and could not be recovered. previous termAlkalinenext term hydrothermal treatment (45 ml or 60 ml KOH 1 M) showed similar debromination for up to 12 g HIPS-Br and plastic was recovered as pellets with molecular weight distribution close to that of the initial material. Debromination occurs at melt plastic/KOH solution interface when liquid/vapour equilibrium is attained inside autoclave (280℃ and 7 MPa in our experimental conditions) and depends on the plastic amount/KOH volume ratio. The antimony oxide synergist from HIPS-Br remains in recovered plastic during treatment. A pictorial imagination of the proposed debromination process is presented.
Digital Object Identifer: 10.1016/j.chemosphere.2006.02.036
Published with permission from the copyright holder. This is the author's copy, as published in Chemosphere, August 2006, Volume 64, Issue 6, Pages 1021-1025.
Direct access to Thomson Web of Science
Copyright © 2006 Elsevier Ltd. All rights reserved.
Pergamon-Elsevier Science Ltd
|Web of Science KeyUT|