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The effect of temperature on the fine structural characteristics of cotton fibre – a small‐angle X‐ray scattering investigation using correlation functions
Author(s) -
Misra T.,
Bisoyi D. K.,
Khan Md. N.,
Patel T.
Publication year - 1991
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889891001693
Subject(s) - small angle x ray scattering , scattering , void (composites) , macromolecule , small angle scattering , bar (unit) , molecular physics , optics , materials science , chemistry , physics , composite material , biochemistry , meteorology
The small‐angle X‐ray scattering (SAXS) technique has been applied to evaluate macromolecular parameters of dewaxed cotton fibre at five different temperatures, 298, 310, 319, 327 and 334 K. For the experimental measurement of scattering intensities, a small‐angle Kratky camera coupled with an automatic step‐scanning device, pulse‐height discriminator and a counter attachment were used. The samples were found to be non‐ideal two‐phase densely packed systems, deviating from Porod's law. The theories of Ruland and Vonk [Ruland (1971). J. Appl. Cryst . 4 , 70–73; Vonk (1971). J. Appl. Cryst. 4 , 340–342; (1973). J. Appl. Cryst. 6 , 81–86] have been utilized to determine the width of the transition layer. The three‐ and one‐dimensional correlation functions have been computed and the macromolecular parameters such as D , the transversal periodicity, S / V , the specific inner surface, l c , the length of coherence, 1 , 2 , the transversal lengths in matter and void respectively, r , the range of inhomogeneity, E , the width of the transition layer and ϕ 1 and ϕ 2 , the volume fractions of matter and void, have been evaluated. Details of the theories and methods of evaluating the above parameters have been thoroughly detailed in an earlier paper. The effect of temperature on the fine structural characteristics ( i.e. macromolecular parameters) of cotton are reported in the present paper.