Resumo

EVORA, Maria C. et al. A Comparison of Transmission, Reflection and Photoacoustic FTIR Techniques in the Analysis of Recycled and Irradiated Polyamide-6. Polímeros [online]. 2002, vol.12, n.1, pp.60-68. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282002000100013.

A comparative study involving transmission, reflection and photoacoustic FTIR techniques is presented with analysis of polyamide-6. The potential and limitations of these methods are investigated by analyzing structural variations that take place at the surface in the bulk in recycled and irradiated polyamide-6 with a 1.5 MeV electron beam with a 500kGY dose, in the presence of O₂. FTIR techniques appear to be sensitive in detecting small structural changes that occur in recycled and irradiated polyamide-6. The analysis of samples indicated the formation of ¾OH, HOC=O-, - C=O groups. Also, small structural changes were detected which are characterisitic of NH and ¾CN-C=O groups. Transmission techniques show better the structural changes in the bulk, and microscopy-FTIR appears to be more sensitive in detecting what occurs at the sample surface.

Palavras-chave : Recycled polyamide-6; irradiated polyamide-6; infrared spectroscopy.

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