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Polymer Degradation and StabilityVolume 87, Issue 1, January 2005, Pages 177-182

Thermal stability of starch benzoate(Article)

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  • aFaculty of Technology and Metallurgy, University of Belgrade, Belgrade, Yugoslavia
  • bDepartment of Physical Chemistry, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Yugoslavia

Abstract

Starch esterification with benzoyl chloride was performed in two steps, the first being the alkali treatment of the starch and the second, esterification. Samples of hydrophobic starch benzoate were synthesized with degrees of substitution: 0.73,1.18 and 1.76 and their thermal stability was investigated by non-oxidative, non-isothermal thermogravimetry. It was shown that starch benzoate was thermally less stable than native starch, the thermal stability decreasing with increasing degree of substitution. The results indicated that the scission of CO2 and/or benzoyl groups probably occurred in the temperature region 100-260°C, depending on the degree of substitution. The overall activation energies of thermal degradation were calculated by the Flynn-Wall method. © 2004 Elsevier Ltd. All rights reserved.

Author keywords

Starch benzoateThermal degradation

Indexed keywords

Engineering controlled terms:Activation energyAromatic compoundsCarbon dioxideEsterificationHydrophobicityPyrolysisStarchSubstitution reactionsSynthesis (chemical)Thermogravimetric analysis
Engineering uncontrolled terms:Atomic massFlynn-Wall methodNon-isothermal thermogravimetryStarch benzoate
Engineering main heading:Thermodynamic stability

Funding details

Funding sponsor Funding number Acronym
1948

  • 1

    This work was financially supported by the Ministry of Science, Technology and Development of Serbia (Research project number: 1948).

  • ISSN: 01413910
  • CODEN: PDSTD
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1016/j.polymdegradstab.2004.07.018
  • Document Type: Article

  Jeremić, K.; Department of Physical Chemistry, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Yugoslavia;
© Copyright 2008 Elsevier B.V., All rights reserved.

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