Thermo- and Photo-oxidation Products

The HS-SPME method was also developed for the extraction of low molecular weight compounds from virgin or thermo-oxidized polyamide-66 [14, 

In an unpubhshed study, SPME and a 65p,m PDMS/DVB fiber were apphed for extraction of polystyrene (PS) thermo-oxidation products. As seen in Fig. 4, styrene monomer was the main compoimd migrating from the virgin material after low temperatme thermo-oxidation at 80 °C. After 20 weeks, new low molecular weight compoimds including toluene, ethyl benzene, benzaldehyde and acetophenone were also identified. Volatiles migrating from poly(vinyl chloride)/polycaprolactone-carbonate (PVC/PCL-PC) during thermo-oxidation were extracted by PDMS/DVB fiber [19]. The identified compounds included degradation products of PCL-PC, i.e., 

6-hydroxyhexanoic acid and caprolactone. CW/DVB fiber was used to extract thermo-oxidation products from poly(ethylene oxide-propylene oxide-ethylene oxide) [20]. The identified compoimds mainly included different formates and acetates. Chambers et al. have developed SPME methods to study aging and defects in polymers while they are deployed in nuclear weapons [21]. Chlorofiuoropolymers, polyurethanes and polysiloxanes were 

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