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Determination of the degree of substitution (DS) of mixed cellulose esters by elemental analysis

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Abstract

Equations for transforming the results of elemental analysis (EA) into degree of substitution (DS) values for aliphatic cellulose esters were developed. The equations allow one to determine the DS of cellulose derivatives bearing not only one but also two different acyl substituents. Error transmission studies revealed that the accuracy of the DS-values for a pure sample depends on both the number of carbon atoms in the substituents and on the uncertainty of the EA, especially from the hydrogen content. This method provides accurate DS-values (±0.10 in most cases) if H-content determinations are within ±0.1%.

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Authors and Affiliations

  1. Laboratoire de Chimie Agro-Industrielle, (UMR 1010 INRA/INP-ENSIACET) Ecole Nationale Supérieure d'lngéeurs en Arts Chimiques et Technologiques, Institut National Polytechnique de Toulouse, 118, route de Narbonne, 31077, Toulouse Cedex 04, France

    C. Vaca-Garcia, M.E. Borredon & A. Gaseta

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  1. C. Vaca-Garcia
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  2. M.E. Borredon
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  3. A. Gaseta
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Vaca-Garcia, C., Borredon, M. & Gaseta, A. Determination of the degree of substitution (DS) of mixed cellulose esters by elemental analysis. Cellulose 8, 225–231 (2001). https://doi.org/10.1023/A:1013133921626

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  • DOI: https://doi.org/10.1023/A:1013133921626

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