期刊
POLYMER DEGRADATION AND STABILITY
卷 89, 期 1, 页码 33-37出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2004.12.021
关键词
solid phase microextraction; volatile products; thermal degradation; polymers
Solid phase microextraction (SPME) was used to analyse the products evolved in the thermal degradation of polypropylene (PP) which was used as a model polymer. The degradation was performed under nitrogen at 470 degrees C using polydimethylsiloxane and carboxen/polydimethylsiloxane as the fibres for the product pre-concentration. The evolved degradation products were identified by infrared spectroscopy (FTIR) and gas chromatography/mass spectroscopy (GC/MS). More than 30 evolved products associated with alkenes (61.0%), alkanes (33.0%) and alkadienes (4.3%), were identified. In agreement with the literature, evolved products such as 2,4-dimethyl-1-heptene, n-pentane, 2-pentene, propylene, 2-methyl-1-pentene, 2,4,6-trimethyl-1-nonene, etc., were detected from the polypropylene thermal degradation. The results suggest that the SPME technology offers important factors such as, rapid analysis and great efficiency in the pre-concentration of evolved products from the thermal degradation of polymers. (c) 2005 Elsevier Ltd. All rights reserved.
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