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X-ray diffraction characterization of a distorted Debye–Scherrer film strip – the effect of deacetylation on cellulose triacetate and an improved structural model for cellulose II

Published online by Cambridge University Press:  09 April 2014

T. N. Blanton ,
J. A. Kaduk  and
Q. Johnson
T. N. Blanton*
Affiliation:
International Centre for Diffraction Data, Newtown Square, Pennsylvania 19073
J. A. Kaduk
Affiliation:
Illinois Institute of Technology, Chicago, Illinois 60616
Q. Johnson
Affiliation:
Materials Data Incorporated, Livermore, California 94550
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

A Debye–Scherrer film that had been stored for several years in an office environment file cabinet was observed to be shriveled and distorted in appearance. An investigation using X-ray diffraction was carried out to determine the cause of the physical change in the film strip. As expected, silver phases were detected, due to the photographic capture layer coated on the surface of all traditional X-ray films. An unexpected result was the presence of cellulose II, an indication that a chemical change had occurred in the original cellulose triacetate (CTA) polymer film base. Laboratory experiments used to demonstrate an accelerated method of deacetylation of CTA were carried out, resulting in phase pure cellulose II. A density functional geometry optimization allowed for the generation of an improved structural model for cellulose II. Calculated and experimental powder patterns for cellulose II have been submitted to the International Centre for Diffraction Data for inclusion in future releases of the Powder Diffraction File.

Keywords

Cellulose triacetateDeacetylationPhotographic filmX-ray diffraction
Type
Technical Articles
Information
Powder Diffraction , Volume 29 , Issue 2 , June 2014 , pp. 108 - 112
Copyright
Copyright © International Centre for Diffraction Data 2014 

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References

Allen, N. S., Edge, M., Appleyard, J. H., Jewitt, T. S., Horie, C. V., and Francis, D. (1987). “Degradation of historic cellulose triacetate cinematographic film: the vinegar syndrome,” Polym. Degradation Stab. 19, 379–387.CrossRefGoogle Scholar
Corney, G. M., Erickson, L., and Splettstosser, H. R. (1977). “X-rays and gamma rays,” in The Theory of the Photographic Process, edited by James, T. H. (Macmillan Publishing Co., Inc., New York), Chapter 23, pp. 662–670.Google Scholar
Eastman Kodak Company (2013). “Molecular sieve and the prevention of the vinegar syndrome.” Web address: http://motion.kodak.com/motion/Support/Technical_Information/Storage/vinegar.htm.Google Scholar
Edge, M., Allen, N. S., Jewitt, T. S., and Horie, C. V. (1989). “Fundamental aspects of the degradation of cellulose triacetate base cinematograph film,” Polym. Degradation Stab. 25, 345–362.CrossRefGoogle Scholar
ICDD (2012). PDF-4+ 2012 (Database), edited by Dr. Kabekkodu, Soorya, International Centre for Diffraction Data, Newtown Square, PA, USA.Google Scholar
Kaduk, J. A. and Blanton, T. N. (2013). “An improved structural model for cellulose II,” Powder Diffr. 28(3), 194–199.CrossRefGoogle Scholar
MDI (2011). JADE 9.0 (Computer Software), Materials Data Inc., 1224 Concannon Drive, Livermore, CA.Google Scholar
Plastics Historical Society (2011). “Cellulose Acetate.” Web address: http://www.plastiquarian.com/index.php?id=59.Google Scholar
Ram, A. T., Kopperl, D. F., Sehlin, R. C., Masaryk-Morris, S., Vincent, J. L., and Miller, P. (1994). “The effects and prevention of the vinegar syndrome,” J. Imaging Sci. Technol. 38(3), 249–261.Google Scholar
Reilly, J. M. (1993). IPI Storage Guide for Acetate Film (Image Permanence Institute, Rochester, New York), p. 10.Google Scholar