Free-radical and functional-group formations in cotton cellulose and in acetylated, benzhydrylated, benzoylated, benzylated, and cyanoethylated cotton celluloses on irradiation with near-uv light were determined. Modified cotton celluloses with electron withdrawing groups, such as acetyl and benzoyl groups, were more resistant to photooxidation than modified celluloses with structures, such as benzhydryl, benzyl, and cyanoethyl groups. The electron-spin resonance spectra of the photo-irradiated celluloses, in all cases, were singlet spectra; however, the steady-state concentrations of the free radicals in the irradiated celluloses were related to the nature of the pendant groups.
Arthur, J.C., Jr., Intramolecular Energy Transfer in Cellulose and Related Model Compounds, in "Energy Transfer in Radiation Processes," G. O. Phillips, Ed., Amsterdam, Elsevier, pp. 29-36, 1966.
2.
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3.
Arthur, J.C. , Jr., Mares, T., and George, M., Some Properties of Benzoylated Cotton, Textile Res. J.35, 1116-1119 (1965).
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Baugh, P.J., Phillips, G.O., and Worthington, N.W. , Photodegradation of Cotton Cellulose. I. Reactions Sensitized by Anthraquinone Sulfonates, J. Soc. Dyers Colourists85, 241-245 (1969).
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Compton, J., Martin, W.H., Word, B.H., Jr., and Barber, R.P. , Pilot Plant Production and Properties of Cyanoethylated Cotton, Textile Res. J.25, 58-75 (1955).
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Daruwalla, E.H. , D'Silva, A.P., and Mehta, A.C., Photochemistry of Cotton and Chemically Modified Cotton. I. Behavior during Exposure to Carbon Arc and Solar Radiation , Textile Res. J.37, 147-160 (1967).
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Egerton, G.S. and Assaad, N.E.N., Photochemical Behavior of Vat Dyes. I. Reaction with the Polymer Substrate, J. Soc. Dyers Colourists86, 203-208 (1970) .
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Hatchard, C.G. and Parker, C.A., A New Sensitive Chemical Actinometer. II. Potassium Ferrioxalate as a Standard Chemical Actinometer, Proc. Roy. Soc.A235, 518-536 (1956).
11.
Klein, E., Stanonis, D.J., Harbrink, P., and Berni, R.J., The Preparation andProperties of Partially Benzylated Cotton, Textile Res. J.28, 659-668 (1958).
12.
Phillips, G.O. , Blouin, F.A., and Arthur, J.C., Jr., Radiation Stabilization of Glycosides by Aromatic Groups, Radiation Res.23, 527-536 (1964).
13.
Reine, A.H. and Arthur, J.C., Jr., Photochemistry of Cotton Cellulose. The Direct Action of Near-Ultraviolet Light on Purified Fibrous Cotton Cellulose , Textile Res. J.40, 90-92 (1970) .
14.
Stanonis, D.J. and King, W.D., Preparation of Partially Benzhydrylated Cotton Cellulose, Textile Res. J.30, 802-803 (1960) .
