Abstract
Silk fibres at room temperature after treatment with solutions of HCl (pH=2) and NaOH (pH=10) have been investigated using the SAXS (small angle X-ray scattering) technique. The theories developed by Vonk (1973) and Ruland (1971) for nonideal two-phase structure characterised by continuous variation of electron density at the phase boundary have been applied to calculate various macromolecular parameters such as the width of transition layer, the average periodicity transverse to the layer, the specific inner surface, the length of coherence, the transversal lengths in matter and void, the range of inhomogeneity, the volume fractions of matter and void, the volume fraction of the transition layer and the characteristic number.
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