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Journal of Spectroscopy
Volume 2016, Article ID 9605312, 6 pages
http://dx.doi.org/10.1155/2016/9605312
Research Article

XRD Investigation of Some Thermal Degraded Starch Based Materials

1Faculty of Physics, Babes-Bolyai University, Nr. 1, Kogalniceanu Str., 40047 Cluj-Napoca, Romania
2INMA Bucharest, Branch Cluj-Napoca, Nr. 59, Al. Vaida Voievod Str., 40047 Cluj-Napoca, Romania

Received 17 August 2016; Revised 24 October 2016; Accepted 10 November 2016

Academic Editor: Nikša Krstulović

Copyright © 2016 Mihai Todica et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The thermal degradation of some starch based materials was investigated using XRD method. The samples were obtained by thermal extrusion of mixtures of different proportions of starch, glycerol, and water. Such materials are suitable for the manufacturing of low pollutant packaging. Thermal degradation is one of the simplest ways to destroy such materials and this process is followed by structural modification of the local ordering of samples, water evaporation, crystallization, oxidation, or destruction of the chemical bonds. These modifications need to be studied in order to reduce to the minimum production of pollutant residues by burning process. XRD measurements show modification of the local ordering of the starch molecules depending on the temperature and initial composition of the samples. The molecular ordering perturbation is more pronounced in samples with low content of starch.