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Cited by 485

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Determination of the Structure of Cellulose II

Kolpak, F. J., Blackwell, J.·1976·Macromolecules
DOI 10.1021/ma60050a019
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Abstract

The structure of regenerated cellulose is shown by x-ray diffraction to be comprised of an array of antiparallel chain molecules. The determination was based on the intensity data from rayon fibers and utilized rigid-body least-squares refinement techniques. The unit cell is monoclinic with space group P2(1) and dimensions a = 8.01 A, b = 9.04 A, c = 10.36 A (fiber axis), and gamma = 117.1 degrees. Models containing chains with the same sense (parallel) or alternating sense (antiparallel) were refined against the intensity data. The only acceptable model contains antiparallel chains. The -CH2OH groups of the corner chain are oriented near to the gt position while those of the center chain are near to the tg position. Both chains possess an O3-H-O5' intramolecular hydrogen bond, and the center chain also has an O2'-H-O6 intramolecular bond. Intermolecular hydrogen bonding occurs along the 020 planes (o6-h-o2 bonds for the corner chains and O6-H-O3 bonds for the center chains) and also along the 110 planes with a hydrogen bond between the O2-H of the corner chain and the O2' of the center chain. This center-corner chain hydrogen bonding is a major difference between the native and regenerated structures and may account for the stability of the latter form.

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Metadata

Authors
Kolpak, F. J., & Blackwell, J.
Venue
Macromolecules
Publisher
American Chemical Society (ACS)
Published
1976-03
Volume
9
Issue
2
Pages
273-278
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
DOI
10.1021/ma60050a019
OpenAlex
W2055107331
Cited by
485
References
0
FWCI
5.32
Type
journal article
Language
en
Open access
closed

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