Selective decomposition of hexabromocyclododecane in polystyrene with a photo and thermal hybrid treatment system

Selective hexabromocyclododecane (HBCD) decomposition was performed with a polystyrene (PS)/HBCD flour sample by a photo and thermal hybrid treatment system. The complete HBCD decomposition required the multistep treatment to control PS crosslink reaction. The HBCD decomposition was initially perfor...

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Bibliographic Details
Published in:Polymer degradation and stability 2017-09, Vol.143, p.130-135
Main Authors: Arita, Saki, Yamaguchi, Kanae, Motokucho, Suguru, Nakatani, Hisayuki
Format: Article
Language:English
Subjects:
Crosslinking
Decomposition
Decomposition reactions
Heat treatment
Hexabromocyclododecane
Hybrid systems
NMR
Nuclear magnetic resonance
Photo and thermal hybrid treatment
Photocatalysis
Polyethylene
Polyethylenes
Polystyrene
Polystyrene resins
Recycle
Stiffness
Titanium oxides
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Summary:Selective hexabromocyclododecane (HBCD) decomposition was performed with a polystyrene (PS)/HBCD flour sample by a photo and thermal hybrid treatment system. The complete HBCD decomposition required the multistep treatment to control PS crosslink reaction. The HBCD decomposition was initially performed by a TiO2/polyethylene oxide (PEO) photocatalyst and then was thoroughly done with breaking a dormant species (nitroxyl compound) by thermal treatment. The decomposition ratio reached 94% by the hybrid treatment. The 1H-NMR spectrum of decomposition residue showed that HBCD fragmentation occurred and that PS part was modified. The recycled PS contained a polymer chain grafting HBCD moiety. The graft caused PS stiffness enhancement although the ratio was a very low value.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2017.07.003