Intrinsic strain effect on crystal and molecular structure of (dch32) cotton fiber

Samir, O. M. and Somashekar, R. (2007) Intrinsic strain effect on crystal and molecular structure of (dch32) cotton fiber. Powder Diffraction, 22 (1). pp. 20-26. ISSN 1945-7413

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X-ray diffraction pattern from cotton fiber (dch32) grown in the Karnataka state of India has been recorded. Fiber was found to contain 17 Bragg reflections, of which 11 are broadened because of crystal size and intrinsic strain influences. Contributions to integrated intensities from intrinsic strain in the fiber have been estimated using line profile analysis. A molecular model was first constructed with standard bond lengths and angles using helical symmetry and layer-line spacings observed in the X-ray pattern. The model was then refined against observed X-ray data using the linked atom least squares (LALS) method. The refinement has been done with and without the intrinsic strain correction to find the extent of structural changes. These changes have been quantified in terms of bond angles, bond lengths, and torsion angles. Young’s modulus has been estimated for these fibers using the results of line profile analysis, and a broad agreement with the reported physical measurements has been obtained.

Item Type: Article
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: MUL SWAPNA user
Date Deposited: 20 Sep 2019 05:15
Last Modified: 20 Sep 2019 05:15

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