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Abstract This paper is devoted to the impact of oxygen diffusion on thermal ageing of PA-6,6. Samples were subjected to ageing in air at temperatures ranging from 140°C to 200°C… Click to show full abstract
Abstract This paper is devoted to the impact of oxygen diffusion on thermal ageing of PA-6,6. Samples were subjected to ageing in air at temperatures ranging from 140°C to 200°C for different times. Depth profiling methods using AFM measurements were developed to characterise the heterogeneity of the thermal and mechanical properties of the oxidised polymer. A comparison of the results obtained with micro-FTIR profiles was performed to correlate the chemical and physical changes induced by oxidation (i.e., from molecular to macroscopic scales). As a result of diffusion-limited oxidation (DLO), it was shown that polymer oxidised much faster at the surface than in the bulk.
Journal Title: Polymer Degradation and Stability
Year Published: 2021
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