Abstract
The IR spectra of cyanethylated and UV irradiated polyamide fibres in a wide spectral range, and their light-resistance and tensile strength were investigated. Cyanethylation was found to proceed due to the loss of a hydrogen atom from the NH group. UV radiation was shown to be responsible for chain development which in turn is a cause of the strength and light resistance of cyanethylated PA fibre, as compared to the initial sample. The spectral changes in the investigated ranges of PA fibres due to cyanethylation as well as due to UV radiation were interpreted.
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