Cellulose

, Volume 8, Issue 3, pp 225–231

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

  • C. Vaca-Garcia
  • M.E. Borredon
  • A. Gaseta
Article

DOI: 10.1023/A:1013133921626

Cite this article as:
Vaca-Garcia, C., Borredon, M. & Gaseta, A. Cellulose (2001) 8: 225. doi:10.1023/A:1013133921626

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%.

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • C. Vaca-Garcia
    • 1
  • M.E. Borredon
    • 1
  • A. Gaseta
    • 1
  1. 1.Laboratoire de Chimie Agro-Industrielle, (UMR 1010 INRA/INP-ENSIACET) Ecole Nationale Supérieure d'lngéeurs en Arts Chimiques et TechnologiquesInstitut National Polytechnique de ToulouseToulouse Cedex 04France

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