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Title: | Kinetics and mechanism of thermal degradation of pentose- and hexose-based carbohydrate polymers |
Authors: | Akbar, Jamshed Iqbal, Mohammad S. Massey, Shazma Masih, Rashid |
Keywords: | Thermogravimetry Isoconversional analysis Thermal degradation Polysaccharides Kinetic triplet Thermal stability Master plots |
Issue Date: | 15-Oct-2012 |
Publisher: | Elsevier Ltd. |
Citation: | Jamshed Akbar, Mohammad S. Iqbal, Shazma Massey, Rashid Masih, Kinetics and mechanism of thermal degradation of pentose- and hexose-based carbohydrate polymers, Carbohydrate Polymers, Volume 90, Issue 3, 2012, Pages 1386-1393, ISSN 0144-8617, https://doi.org/10.1016/j.carbpol.2012.07.008. |
Series/Report no.: | Carbohydrate Polymers;Volume 90, Issue 3, |
Abstract: | This work aims at study of thermal degradation kinetics and mechanism of pentose- and hexose-based carbohydrate polymers isolated from Plantago ovata (PO), Salvia aegyptiaca (SA) and Ocimum basilicum (OB). The analysis was performed by isoconversional method. The materials exhibited mainly two-stage degradation. The weight loss at ambient–115 °C characterized by low activation energy corresponds to loss of moisture. The kinetic triplets consisting of E, A and g(α) model of the materials were determined. The major degradation stage represents a loss of high boiling volatile components. This stage is exothermic in nature. Above 340 °C complete degradation takes place leaving a residue of 10–15%. The master plots of g(α) function clearly differentiated the degradation mechanism of hexose-based OB and SA polymers and pentose-based PO polymer. The pentose-based carbohydrate polymer showed D4 type and the hexose-based polymers showed A4 type degradation mechanism. |
URI: | 10.11.12.71:8080/jspui/handle/123456789/1914 |
ISSN: | 0144-8617 |
Appears in Collections: | Chemistry Department |
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kinetic and mechanism paper.pdf | 961.89 kB | Adobe PDF | View/Open |
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