Authors:
P. M. Stefani Universidad Tecnológica Nacional, Facultad Regional Concepción del Uruguay, Departamento de Ingeniería Civil Ing. Pereira 676, E3264BTD Concepción del Uruguay, Argentina

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D. Garcia Universidad Politécnica de Valencia, Escuela Politécnica Superior de Alcoy, Departamento de Ingeniería Mecánica y de Materiales Paseo del Viaducto, 1, 03801 Alcoy, Spain

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J. Lopez Universidad Politécnica de Valencia, Escuela Politécnica Superior de Alcoy, Departamento de Ingeniería Mecánica y de Materiales Paseo del Viaducto, 1, 03801 Alcoy, Spain

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A. Jimenez University of Alicante, Department of Analytical Chemistry P.O. Box 99, 03080 Alicante, Spain

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Summary The disposal of used automotive tires has caused many environmental and economical problems to most countries. We propose the use of rice husk as filler for increasing the value of recycled tire rubber. Thermal degradation of both components and their sintering mixtures is presented in this paper. Thermal decomposition of rice husk occurs in various steps in the temperature range between 150 and 550°C. This complex process is the result of the overlapping of thermal decomposition of the three major constituents common in all lignocellulosic materials, i.e., hemicellulose, lignin and cellulose. Hemicellulose is degraded at temperatures between 150 and 350°C, cellulose from 275 to 380°C and lignin from 250 to 550°C. The degradation process of major constituents of scrap tires or their composites is observed at temperatures between 150 and 550°C. For composites, the addition of rice husk (maximum 25%) produces an increase in the mass loss rate. This effect is higher as the amount of rice husk increases. However, the degradation initial temperature of elastomeric matrix is not affected with addition of rice husk. Apparent kinetic parameters were also studied by the isoconversional Friedman method. We observed that the addition of rice husk produces a decrease in apparent activation energy for low conversions (up to 0.6). For higher conversions this decrease was not so clearly observed.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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