• Rafid H. Khalaf Iraqi Ministry of Education-Directorate of Education in AL-Anbar, Iraq-
  • Nabeel M. Abd-Alghafour Iraqi Ministry of Education-Directorate of Education in AL-Anbar, Iraq
  • Ahmed F. Abdulrahman Department of Medical Laboratory Technology, Technical Institute of Amedi, Duhok Polytechnique University, Kurdistan Region, Iraq



Epoxy resin , Silica powder , Thermomechanical technique , Thermal analysis , Thermal expansion


In this study, a polymeric-based composite material was made using 80% epoxy polyester 20% and unsaturated polyester resin. The polymeric composites were prepared by manual moulding method by adding a support material of silica powder to the mixture by weight (0%, 5%, 10%, and 15%) to examine one of the thermal properties which are thermal expansion. A comparison was made with the polymeric mixture before and after the reinforcement. The results of the study showed that the coefficient of thermal expansion increases with increasing temperatures, while it decreases at high temperatures. The results also showed that there is a decrease in the degree of glass transition with an increase in the concentration of the additive, and it was also noted that an increase in the percentage of silica at 15% decreases the value of the thermal expansion coefficient compared to other samples.


Bhatnagar, M. S. (2004) A Textbook of Polymer Chemistry.S. Chand Publishing, (2004).

Utracki, Leszek A., and B. D. Favis. (1989) Polymer alloys and blends. Handbook of polymer science and technology 4,121-185.

Karvanis, K.; Rusnáková, S.; Krejčí, O.; Žaludek, M. (2020) Preparation, Thermal Analysis, and Mechanical Properties of Basalt Fiber/Epoxy Composites. Polymers, 12, 1785.

Yoon, P. J., T. D. Fornes, and D. R. Paul. (2002) Thermal expansion behavior of nylon nanocomposites. Polymer 43, 6727-6741.

Jose James, (2017) Chapter 7-Thermomechanical Analysis and Its Applications, Editor(s): Sabu Thomas, Raju Thomas, Ajesh K. Zachariah, Raghvendra Kumar Mishra, In Micro and Nano Technologies, Thermal and Rheological Measurement Techniques for Nanomaterials Characterization, Elsevier, Pages 159-171, ISBN 9780323461399.

Preghenella, Michele, Alessandro Pegoretti, and Claudio Migliaresi. (2006) Atomic force acoustic microscopy analysis of epoxy–silica nanocomposites. Polymer testing 25, 443-45.

Study the contrast of thermal expansion behavior for PMMA denture base, single and hybrid reinforced using the thermomechanical analysis technique (TMA). AIP Conf. Proc. 2769, 020027 (2023).

Yang, L., Thomason, J.L. (2013). The thermal behaviour of glass fiber investigated by thermomechanical analysis. J Mater Sci 48, 5768–5775.

Saba, N., and M. Jawaid. (2018) A review on thermomechanical properties of polymers and fibers reinforced polymer composites. Journal of industrial and engineering chemistry 67, 1-11.

Rammo, Nabil N., Khalid H. Harbee, and Hind Abdulmajeed Mahdi. (2011) TMA and DSC study of molded and annealed polyester: a thermal expansion and crystallization evaluation. Al-Mustansiriyah Journal of Science 22, 7.

Ali, Aqeel Mohsin, Mohammed A. Jaber, and Nooraldeen A. Toama. (2021) Thermal Properties of Polyester/Epoxy Blend. Iraqi Journal of Science 62, 1128-1134.

Al Arbash, A., Z. Ahmad, F. Al-Sagheer, and A. A. M. Ali. (2006) Microstructure and thermomechanical properties of polyimide silic nanocomposites. Journal of Nanomaterials 1-9.

Tognana, S., W. Salgueiro, A. Somoza, J. A. Pomarico, and H. F. Ranea-Sandoval. (2009) Influence of the filler content on the thermal expansion behavior of an epoxy matrix particulate composite. Materials Science and Engineering: B 157, 26-31.

Biron, Michel. (2003) Thermosets and composites. Elsevier.

[Mohammed, Awatif Adab, Sinaa Ibrahim Hussein, and Inaam Hussein Ali. (2007) Study of temperature effect on the Hardness for epoxy resin and unsaturated polyester. Baghdad Science Journal 4, (2007).

[Wunderlich, Bernhard. (2005) Basics of thermal analysis. Thermal Analysis of Polymeric Materials 71-188.

Al-Mosawi, Ali I. (2009) Study of some mechanical properties for polymeric composite material reinforced by fibers. Al-Qadisiyah Journal for Engineering Sciences 2, 1.

Michels, Julien, Robert Widmann, Christoph Czaderski, Reza Allahvirdizadeh, and Masoud Motavalli. (2015) Glass transition evaluation of commercially available epoxy resins used for civil engineering applications." Composites Part B: Engineering 77 484-493.

Pugazhenthi, N., and P. Anand. (2021) Mechanical and thermal behavior of hybrid composite medium density fiberboard reinforced with phenol formaldehyde. Heliyon 7, 12.

Junid, Ramli, Januar Parlaungan Siregar, Nor Azam Endot, Jeefferie Abd Razak, and Arthur N. Wilkinson. (2021) Optimization of Glass Transition Temperature and Pot Life of Epoxy Blends Using Response Surface Methodology (RSM). Polymers 13, no. 19-3304.

] Liu, Tuan, Cheng Hao, Shuai Zhang, Xiaoning Yang, Liwei Wang, Jiarui Han, Yuzhan Li, Junna Xin, and Jinwen Zhang. (2018) A self-healable high glass transition temperature bioepoxy material based on vitrimer chemistry. Macromolecules 51, no. 15-5577-5585.

[Startsev, O. V., Yu M. Vapirov, M. P. Lebedev, and A. K. Kychkin. (2020) Comparison of glass-transition temperatures for epoxy polymers obtained by methods of thermal analysis. Mechanics of Composite Materials 56, no. 2 :227-240.




How to Cite

Khalaf , R. H., Abd-Alghafour , N. M., & Abdulrahman , A. F. (2024). VARIATION IN THERMAL STRESS BEHAVIOUR OF COMPOSITE MATERIALS BY THERMOMECHANICAL TECHNIQUE (TMA). Science Journal of University of Zakho, 12(1), 46–49.



Science Journal of University of Zakho