International Scientific Journal


Thermal properties of flax roves untreated and treated were characterized by differential scanning calorimetry (DSC) and thermal gravity analyzer (TGA) in order to understand their thermal behavior in more detail and to evaluate the effect of scouring processing on the thermal behavior. Flax roves were treated with six kinds of methods including biological scouring, one bath, two bath, bleaching, alkali scouring and industry chemical scouring as standards. Results showed that all treatments improved thermal stability of flax roves. The results indicated that glass transition temperature (Tg) decreased after scouring besides the sample by directly bleaching. It is more difficult to determine the endothermic peak of flax treated by chemical scouring in industry because it takes a very flat course. A distinct endothermic peak was observed for the untreated flax rove, while a distinct exothermic peak in different temperature interval was revealed for other four treated flax rove samples. For TGA analysis, thermal degradation of flax roves studied consists of three regions of the initial, main, and char decomposition, and the third stage consists of secondary weight loss and carbonization for flax roves with biological scouring, one-bath and two-bath. Besides, different residue left indicates that the bio-scoured flax roves are lost with volatile products and does not contribute to char formation. These results provide valuable preferences for mechanism and top value added application of bio-scouring in flax roves.
PAPER REVISED: 2013-11-29
PAPER ACCEPTED: 2013-12-25
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 3, PAGES [939 - 945]
  1. Valladares Juárez, A.G., et al., Development of a biotechnological process for the production of high quality linen fibers. Bioprocess and Biosystems Engineering, 34(2011), 8, pp. 913-921.
  2. Albano, C., et al., Thermal stability of blends of polyolefins and sisal fiber. Polymer Degradation and Stability, 66(1999), 2,pp. 179-190.
  3. Rudnik, E., Thermal properties of biocomposites. Journal of Thermal Analysis and Calorimetry, 88(2007), 2, pp. 495-498.
  4. Bertomeu, D., et al., Use of eco-friendly epoxy resins from renewable resources as potential substitutes of petrochemical epoxy resins for ambient cured composites with flax reinforcements. Polymer Composites, 33(2012),5,pp. 683-692.
  5. Wielage, B., et al., Thermogravimetric and differential scanning calorimetric analysis of natural fibres and polypropylene. Thermochimica Acta, 337(1999):1-2, pp. 169-177.
  6. Van De Velde, K. and P. Kiekens, Thermal degradation of flax: The determination of kinetic parameters with thermogravimetric analysis. Journal of Applied Polymer Science, 83(2002),12,pp. 2634-2643.
  7. Galwey, A.K., M.A.A. Mohamed, and M.E. Brown, Thermal decomposition of silver squarate. Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 84(1988),1, pp. 57-64.
  8. López-Manchado, M.A., et al., Ternary Composites Based on PP-EPDM Blends Reinforced With Flax Fibers. Part I: Processing and Thermal Behavior. Polymer Engineering and Science, 43(2003),5, pp. 1018-1030.
  9. Arbelaiz, A., et al., Thermal and crystallization studies of short flax fibre reinforced polypropylene matrix composites: Effect of treatments. Thermochimica Acta, 440(2006),2, pp. 111-121.
  10. Buranov, A.U., K.A. Ross, and G. Mazza, Isolation and characterization of lignins extracted from flax shives using pressurized aqueous ethanol. Bioresource Technology, 101(2010),19, pp. 7446-7455.
  11. Vicini, S., et al., Thermal analysis and characterisation of cellulose oxidised with sodium methaperiodate. Thermochimica Acta, 418(2004),1-2,pp. 123-130.
  12. Parvinzadeh Gashti, M. and A. Elahi, UV radiation inducing succinic acid/silica-kaolinite network on cellulose fiber to improve the functionality. Composites Part B: Engineering, 2013. 48, pp. 158-166.
  13. Kazayawoko, M., J.J. Balatinecz, and R.T. Woodhams, Diffuse reflectance Fourier transform infrared spectra of wood fibers treated with maleated polypropylenes. Journal of Applied Polymer Science, 66(1997),6,pp. 1163-1173.
  14. Devallencourt, C., J.M. Saiter, and D. Capitaine, Characterization of recycled celluloses: Thermogravimetry/Fourier transform infra-red coupling and thermogravimetry investigations. Polymer Degradation and Stability, 52(1996),3, pp. 327-334.

© 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence