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  • 1 Laboratory of Man-Made Polymers Higher Institute of Chemical Technology 1156 Sofia Bulgaria
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DTA, TG and TMA were used to study wool samples of 64 quality, dyed and chromed in a dyeing bath at a low temperature (353 K), as well as by the conventional method involving boiling (369 K). The TMA data allowed establishment of the basic temperatures connected with theα-β transition of the wool keratin, the melting of the crystal regions and protein denaturation. It was shown that wool fibres chromed with 30 w.% K2Cr2O7 at 353 K exhibit a decreased exothermic process in the range 700–750 K, which provides a possibility for evaluation of the effect of processing on the structural changes of the fibre keratin.

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