Effect of polyethylene terephthalate (PET) on the pyrolysis of brominated flame retardant-containing high-impact polystyrene (HIPS-Br) |
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Authors: | Thallada Bhaskar Nona Merry M Mitan Jude A Onwudili Akinori Muto Paul T Williams Yusaku Sakata |
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Institution: | (1) BioTechnology Institute, University of Minnesota, 240 Gortner Labs, 1479 Gortner Avenue, St. Paul, MN 55108, USA; |
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Abstract: | Pyrolysis of brominated flame retardant-containing high-impact polystyrene (HIPS-Br) was performed at 430°C in the presence
of 0.1 wt% of polyethylene terephthalate (PET) in a Pyrex glass reactor. Two different types of brominated flame retardants
(decabromodiphenyl ether and decabromodiphenyl ethane) with or without antimony trioxide (as synergist) 5 wt% were used. The
presence of PET had a significant effect on the material balance, decreasing the gaseous product and increasing the residue.
The type of flame retardant had no effect on the yield of liquid product; however, the presence of Sb resulted in a marked
difference in the distribution of decomposition products. Analysis by a gas chromatograph equipped with a flame ionization
detector showed that the hydrocarbons were distributed in the range n-C7 to n-C25 with major peaks at n-C9 and n-C17. The presence of PET increased the formation of brominated compounds by several times and affected both the type and quantity
of polybrominated compounds. The liquid products obtained from the pyrolysis of HIPS-Br/PET have to be treated before they
can be used |
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