Abstract
DSC investigations have been used to characterize the microfibril-matrix complex of keratin consisting of helical low-sulfur microfibrils in a nonhelical high-sulfur matrix. The corresponding DSC curves display one or two endothermic peaks in the temperature range 230°–255°C. The first peak is a microfibrillar peak and the second one a matrix peak (cystine decomposition peak). DSC investigations of extended keratins have shown that the microfibrillar peak is a helix peak. DSC investigations of annealed keratins confirm our earlier assumption that the helix peak is no helix melting peak but an irreversible helix unfolding, superimposed by various decomposition reactions. The matrix peak of the above described keratin samples is less reproducible than the corresponding helix peak and cannot be used for further characterization studies of keratins.
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References
MacLaren JA, Milligan B (1981) Wool Science, Science Press
Zahn H (1977) Lenzinger Ber 42:19
Menefee E, Yee G (1965) Text Res J 35:801
Bendit EG (1966) Text Res J 36:580
Haly AR, Snaith JW (1967) Text Res J 37:898
Felix WD, McDowall MA, Eyring H (1963) Text Res J 33:465
Zahn H, Spei M (1978) Chem-Z 102:227
Spei M, Jörissen K, Hack R, Föhles J (1980) Kautsch Gummi Kunstst 33:345
Spei M (1980) Proceedings of the Sixth International Wool and Textile Research Conference, Pretoria, Vol 2, p 263
Spei M, Thomas H (1983) Coll & Polym Sci 261:968
Spei M, Hüskes R (1985) Melliand Textilber 66:759
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Dedicated to Professor E. G. Klesper on the occasion of his 60th birthday.
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Spei, M., Holzem, R. Thermoanalytical investigations of extended and annealed keratins. Colloid & Polymer Sci 265, 965–970 (1987). https://doi.org/10.1007/BF01412398
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DOI: https://doi.org/10.1007/BF01412398