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Orientation of cellulose crystallites in regenerated cellulose fibres under tensile and bending loads

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Abstract

The degree of orientation in regenerated cellulose fibres with a diameter of 36μm was determined using position-resolved synchrotron X-ray microbeam diffraction. The fibres were characterized in unstrained condition, under tensile strain, and in bending. A homogeneous distribution of the degree of crystalline orientation (Herman’s orientation factor f c = 0.85) across the fibre thickness was found in the unstrained fibre. The degree of orientation of cellulose crystallites increased in a linear manner with increasing tensile strain applied to the fibre. Also in bending, a linear relationship between applied strain and the degree of crystalline orientation was found, where f c increased in tension and decreased in compression. This linear relationship was found to be valid for both the tensile and the compressive zone of the bent fibre.

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Acknowledgement

W. Gindl wishes to thank Dr. H. Sixta, Lenzing R&D, for providing fibre samples and for valuable discussion. The commercial tensile stage for the in-situ experiments was kindly provided by Anton Paar Ltd.

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Authors and Affiliations

  1. Department of Materials Science and Process Engineering, University of Natural Resources and Applied Life Sciences, Vienna, Austria

    Wolfgang Gindl

  2. Wood Kplus Competence Centre for Wood Composites and Wood Chemistry, Linz, Austria

    Wolfgang Gindl

  3. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences and Institute of Materials Physics, University of Leoben, Leoben, Austria

    Klaus J. Martinschitz & Jozef Keckes

  4. European Synchrotron Radiation Facility, Grenoble, France

    Peter Boesecke

Authors
  1. Wolfgang Gindl
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  2. Klaus J. Martinschitz
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  3. Peter Boesecke
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  4. Jozef Keckes
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Correspondence to Wolfgang Gindl.

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Gindl, W., Martinschitz, K.J., Boesecke, P. et al. Orientation of cellulose crystallites in regenerated cellulose fibres under tensile and bending loads. Cellulose 13, 621–627 (2006). https://doi.org/10.1007/s10570-006-9074-z

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  • DOI: https://doi.org/10.1007/s10570-006-9074-z

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