Abstract
THERE is a marked reduction of the molecular weight of nitrocellulose on pulping, for the length of fibres is considerably reduced in the process1,2. Staudinger et al.3 have found a similar effect when polystyrene, cellulose and nitrocellulose are ground in a colloid ball-mill, and have also found that nitrocellulose is partially denitrated when grinding is prolonged. These observations indicate that purely mechanical cutting or breaking action can cleave covalerit bonds.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Bruley, Mém. Poudres, 8, 111 (1895–96).
Ellefsen, O., Norsk Skogind., 7, 405 (1953).
Staudinger, H., and Heyer, W., Ber., 67, 1159 (1934); Staudinger, H., and Dreher, Ber., 69, 1091 (1936).
Lagercrantz, C., and Yhland, M., Acta Chem. Scand., 16, 505 (1962).
Austen, D. E. G., Ingram, D. J. E., Given, P. H., Binder, C. R., and Hill, L. W., in Coal Science (Advances in Chemistry Series), 55, 344 (American Chem. Soc., Washington, D.C., 1966).
Bowden, F. P., and Tabor, D., in Friction and Lubrication (Methuen Co., London, 1960).
Clark, J. d'A., in Cellulose and Cellulose Derivatives (edit. by Ott, E., and Spurlin, H. M.), 643 (Interscience, New York, 1954).
Wislicenus, H., and Gierisch, W., Kolloid Z., 34, 169 (1924).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
URBAŃSKI, T. Formation of Solid Free Radicals by Mechanical Action. Nature 216, 577–578 (1967). https://doi.org/10.1038/216577a0
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1038/216577a0
This article is cited by
-
Morphological and magnetic changes during mechano-chemical transformation of lepidocrocite to hematite
Journal of Materials Science (1984)
-
Homeopathie en de farmacie
Pharmaceutisch Weekblad Scientific Edition (1980)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.