Abstract
IT has already been shown that the slow extension of wool fibres under constant stress in water at ordinary temperatures has the characteristics of a first-order reaction; when log (E − Et) is plotted against t, where Et is the extension at time t, a linear relationship is obtained1. As the slowly extended fibres return to their original length on being released in water, even from extensions so great as 70 per cent, molecular slip is excluded, and it seemed probable that a similar, but more precise, relationship would be obtained by extending fibres under constant load. This deduction has been confirmed with Lincoln wool fibres in water at 22.2° C. under a load of 7 × 105 gm. per sq. cm. of the original cross-sectional area.
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References
Speakman, Nature, 159, 338 (1947).
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RIPA, O., SPEAKMAN, J. Plasticity of Wool. Nature 166, 570–571 (1950). https://doi.org/10.1038/166570b0
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DOI: https://doi.org/10.1038/166570b0
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