Chromatographic pattern in recycled high-impact polystyrene (HIPS): Occurrence of low molecular weight compounds during the life cycle
2010 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 95, no 2, 172-186 p.Article in journal (Refereed) Published
The analysis of the chromatographic pattern of virgin, reprocessed, thermo-oxidised, and recycled high-impact polystyrene (HIPS) proves to be a suitable and sensitive tool to assess the degree of degradation of HIPS during its first life and subsequent recycling. Different low molecular weight compounds, such as residues of polymerisation, degradation products, and additives have been identified and relatively quantified in HIPS, using microwave-assisted extraction and further analysis by gas chromatography-mass spectrometry (GC-MS). The release of residues of polymerisation has been proven to occur during reprocessing, thermo-oxidation, and in recycled samples, which may show the emissions of volatile and semi-volatile organic compounds during the life cycle of HIPS. A wide range of oxidised degradation products are formed during reprocessing and thermo-oxidation; these products can be identified as oxidised fragments of polystyrene (PS), oxidised fragments from polybutadiene (PB) phase, and oxidised fragments from the grafting points between the PS and PB phase. Real recycled HIPS samples may also contain contaminations and fragments from additives included in their original formulations; the presence of brominated fragments from flame retardants in electronic waste is here observed.
Place, publisher, year, edition, pages
2010. Vol. 95, no 2, 172-186 p.
Chromatographic pattern, High-impact polystyrene (HIPS), Degradation, Thermo-oxidation, Processing, Volatile organic compounds (VOCs), volatile organic-compounds, residual styrene monomer, gas-chromatography, long wavelengths, thermooxidative degradation, thermal polymerization, oxidative-degradation, expanded polystyrene, mass spectrometry, photo-oxidation
IdentifiersURN: urn:nbn:se:kth:diva-19230DOI: 10.1016/j.polymdegradstab.2009.11.033ISI: 000274711100010ScopusID: 2-s2.0-73449117465OAI: oai:DiVA.org:kth-19230DiVA: diva2:337277
QC 20100525. Tidigare titel: Chromatographic pattern for mimicking the occurrence of volatiles and low molecular weight compounds in high-impact polystyrene during multiple processing and thermo-oxidation2010-08-052010-08-052011-01-20Bibliographically approved