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The Effects of Disaggregating Agents on the Stress-Strain Relationship for Wool Fibers

Division of Protein Chemistry, CSIRO, Parkville (Melbourne), Victoria 3052, Australia

It has been shown that the immersion of wool fibers in solutions capable of denaturing proteins causes either a decrease in the elastic modulus of the Hookean region of the stress-strain diagram or the complete disappearance of this region and a small but significant decrease in stiffness of the fiber in the post-yield region. The strain at the turnover point between yield and post-yield regions and the breaking strain are unaffected by these reagents unless the fibers supercontract during equilibration with the solyent. A decrease in the extension at this turnover point is then observed. The results are used in a critical assessment of various structural models proposed for the wool fiber.

Key Words: Wool • models • physical properties • elasticity • structure • matrix • microfibrils. Protein denaturants • LiBr • urea • phenol • n-propanol • supercontraction. Thiol • disulfide • interchange.

Textile Research Journal, Vol. 42, No. 2, 77-85 (1972)
DOI: 10.1177/004051757204200202


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