Correlation between emitted and total amount of 2-cyclopentyl-cyclopentanone in polyamide 6.6 allows rapid assessment by HS and HS-SPME under non-equilibrium conditions
2004 (English)In: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1052, no 02-jan, 151-159 p.Article in journal (Refereed) Published
A correlation was found between the emitted and total amount of 2-cyclopentyl-cyclopentanone in polyamide 6.6. The emitted amounts were measured by GC-MS after headspace (HS) or headspace solid-phase microextraction (HS-SPME) and the total content was determined after microwave-assisted extraction (MAE). The correlation was valid also under non-equilibrium conditions, which allows rapid assessment of 2-cyclopentyl-cyclopentanone content in polyamide 6.6 by headspace techniques. The incubation time needed for non-equilibrium headspace analysis could be reduced from 5 h to 45 min if the PA66 granules were milled to powder prior to extraction. However, to reach equilibrium between the analyte in the solid sample and the headspace still required 12 h of incubation at 80degreesC. The long incubation time is explained by slow diffusion rate due to the strong hydrogen bonding between analyte and matrix and the relatively high crystallinity of polyamide 6.6. The headspace extraction profile showed several equilibrium-like patterns that are easily mistaken for the real equilibrium.
Place, publisher, year, edition, pages
2004. Vol. 1052, no 02-jan, 151-159 p.
polyamide, solid-phase microextraction, headspace, volatiles, polymers, emission, solid-phase microextraction, gas chromatography/mass spectrometry, volatile organic-compounds, long-term properties, degradation-products, expanded polystyrene, dynamic headspace, roasting bags, extraction, microwave
Polymer Chemistry Polymer Technologies
IdentifiersURN: urn:nbn:se:kth:diva-23812DOI: 10.1016/j.chroma.2004.08.110ISI: 000224501000018ScopusID: 2-s2.0-4744357891OAI: oai:DiVA.org:kth-23812DiVA: diva2:342511
QC 201109142010-08-102010-08-102016-05-30Bibliographically approved