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Crystallinity of cellulose, as determined by CP/MAS NMR and XRD methods

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Summary

The crystallinity of six cellulose samples with different origin and treatment was determined using x-ray diffraction (XDR) and nuclear magnetic resonance with cross polarization and magic angle sample spinning (CP/MAS NMR) methods. The numerical results for crystallinity obtained by using curve fitting methods in both cases correlated very well. It was concluded that the values for the crystallinity can be determined from NMR spectra when CP times not exceeding 0.5 ms are used. The range of order of the samples was further characterized calculating the radial atomic density function from the x-ray diffraction patterns and determining the greatest distances with significant deviations from the average density.

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Authors and Affiliations

  1. Department of Wood and Polymer Chemistry, University of Helsinki, SF-00170, Helsinki, Finland

    R. Teeäär

  2. Department of Physics, University of Helsinki, Siltavuorenpenger 20c, SF-00170, Helsinki, Finland

    R. Serimaa & T. Paakkarl

Authors
  1. R. Teeäär
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  2. R. Serimaa
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  3. T. Paakkarl
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On leave from Institute of Chemical Physics and Biophysics, Estonian Academy of Sciences, SU-200105 Tallinn, USSR

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Teeäär, R., Serimaa, R. & Paakkarl, T. Crystallinity of cellulose, as determined by CP/MAS NMR and XRD methods. Polymer Bulletin 17, 231–237 (1987). https://doi.org/10.1007/BF00285355

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  • DOI: https://doi.org/10.1007/BF00285355

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