ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Chitosan films were prepared by casting from solutions in dilute acetic acid containing methanol, acetone, or dimethyl sulfoxide. Induced changes in the structural orientation of the molecules within the film were studied by wide angle X-ray diffraction, and it was shown that the presence of a high concentration of organic solvent in solution altered the crystal structure of the resultant films, rendering them insoluble in water. Benzoylated and butyrylated derivatives of chitin and chitosan were prepared and characterised by infrared spectroscopy. Films of these derivatives were prepared by casting from a number of organic solvents and water, and the structures examined in more detail by wide angle X-ray diffraction. The introduction of the aliphatic and aromatic groups to the polysaccharide backbone was thus shown to disrupt the natural orientation of the polymer chains; the solubility of the acylated derivatives is discussed with respect to these structural changes.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1989.021900928
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