Kinetic Analysis of Structural Acrylic Curing by DSC: Polymerization and Phase Transition Optimization

Year : 2025 | Volume : 13 | Special Issue 06 | Page : 726 733
    By

    Ganesan S.,

  • Laxmanan,

  • Sravanth Chandaka,

  • Jayavelu S.,

  • Chandra Bose G.,

  1. Professor, Department of Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, India
  2. CAE Project Manager, Ford Motors, Chennai, Tamil Nadu, India
  3. Student, Department of Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, India
  4. Professor, Department of Mechanical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, India
  5. Research Scholar, Department of Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, India

Abstract

Differential Scanning Calorimetry (DSC) was used to analyse the thermal properties and curing behaviour of a structural acrylic adhesive at heating rates of 5, 10, and 15 °C/min. The study focused on the curing kinetics, glass transition temperature (Tg), specific rate (k), and activation energy (Ea) of the polymerization reaction. The material is tested according to ASTM 3418 standards. Results showed that increasing the heating rate shifted the endothermic curing occurred at lower temperatures, consistent with kinetic control of the reaction. It was interpreted that higher heating rates delay the curing reaction to higher temperatures due to kinetic control resulting less time for molecular rearrangement. The heat flow in the sample is negative. The Tg exhibited a heating rate dependence, increasing at higher rates due to thermal lag.  The transition temperature is clustered between 82 °C to 89 °C . The activation energy, determined using Ozawa-Flynn method, was found to be 57.81 KJ/mol, indicating the energy barrier for the curing process. These findings highlighted the trade-off between heating rate and curing quality: slower rates ensure thorough crosslinking but prolong processing, while faster rates save time but risk residual stresses or incomplete curing. The outcome provides critical insights into the thermal behaviour of structural acrylics, aiding in the optimization of curing conditions for industrial applications.

Keywords: DSC, structural acrylic, heating rate, curing kinetics, activation energy, specific heat capacity, glass transition temperature.

[This article belongs to Special Issue under section in Journal of Polymer and Composites (jopc)]

How to cite this article:
Ganesan S., Laxmanan, Sravanth Chandaka, Jayavelu S., Chandra Bose G.. Kinetic Analysis of Structural Acrylic Curing by DSC: Polymerization and Phase Transition Optimization. Journal of Polymer and Composites. 2025; 13(06):726-733.
How to cite this URL:
Ganesan S., Laxmanan, Sravanth Chandaka, Jayavelu S., Chandra Bose G.. Kinetic Analysis of Structural Acrylic Curing by DSC: Polymerization and Phase Transition Optimization. Journal of Polymer and Composites. 2025; 13(06):726-733. Available from: https://journals.stmjournals.com/jopc/article=2025/view=233499


References

  1. Zuo P, Vassilopoulos AP. Review of fatigue of bulk structural adhesives and thick adhesive joints. International Materials Reviews. 2021 Jul;66(5):313-38.
  2. Briggs PC, Jialanella GL. Advances in acrylic structural adhesives. Advances in structural adhesive bonding. 2010 Jan 1:132-50.
  3. Hu N, Shu L, Zheng X, Deng Z, Cang X. A review of modification methods, joints and self-healing methods of adhesive for aerospace. Science Progress. 2024 Apr;107(2):00368504241242271.
  4. Marques AC, Mocanu A, Tomić NZ, Balos S, Stammen E, Lundevall A, Abrahami ST, Günther R, de Kok JM, Teixeira de Freitas S. Review on adhesives and surface treatments for structural applications: Recent developments on sustainability and implementation for metal and composite substrates. Materials. 2020 Dec 8;13(24):5590.
  5. Pethrick RA. Design and ageing of adhesives for structural adhesive bonding–a review. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: design and applications. 2015 Oct;229(5):349-79.
  6. Boeder CW. Anaerobic and structural acrylic adhesives. InStructural Adhesives: Chemistry and Technology 1986 (pp. 217-247). Boston, MA: Springer US.
  7. Ramis Rau S, Vengadaesvaran B, Naziron NN, Arof AK. Strength and adhesion properties of acrylic polyol‐epoxy polyol resin protective coating on mild steel substrate. Pigment & Resin Technology. 2013 Mar 15;42(2):111-6.
  8. Sun S, Li M, Liu A. A review on mechanical properties of pressure sensitive adhesives. International Journal of Adhesion and Adhesives. 2013 Mar 1;41:98-106.
  9. Hayashi A, Sekiguchi Y, Sato C. Effect of temperature and loading rate on the mode I fracture energy of structural acrylic adhesives. Journal of Advanced Joining Processes. 2022 Jun 1;5:100079.
  10. Maurer JJ, Eustace DJ, Ratcliffe CT. Thermal characterization of poly (acrylic acid). Macromolecules. 1987 Jan;20(1):196-202.
  11. Huang Y, Lu J, Xiao C. Thermal and mechanical properties of cationic guar gum/poly (acrylic acid) hydrogel membranes. Polymer degradation and stability. 2007 Jun 1;92(6):1072-81.
  12. Princi E, Vicini S, Pedemonte E, Mulas A, Franceschi E, Luciano G, Trefiletti V. Thermal analysis and characterisation of cellulose grafted with acrylic monomers. Thermochimica Acta. 2005 Jan 20;425(1-2):173-9.
  13. Qiu, L., Wang, K., Zhu, S., Lu, Y., & Luo, G. (2016). Kinetics study of acrylic acid polymerization with a microreactor platform. Chemical Engineering Journal, 284, 233-239.
  14. Park CH, Lee SJ, Lee TH, Kim HJ. Characterization of an acrylic polymer under hygrothermal aging as an optically clear adhesive for touch screen panels. International Journal of Adhesion and Adhesives. 2015 Dec 1;63:137-44.
  15. Newman A, Zografi G. Commentary: Considerations in the measurement of glass transition temperatures of pharmaceutical amorphous solids. Aaps Pharmscitech. 2019 Dec 17;21(1):26.
  16. Abiad MG, Carvajal MT, Campanella OH. A review on methods and theories to describe the glass transition phenomenon: applications in food and pharmaceutical products. Food Engineering Reviews. 2009 Dec;1(2):105-32.
  17. Bernaczyk A, Wagenführ A, Terfloth C, Lincke J, Krystofiak T, Niemz P. Investigations into the influence of temperature on the tensile shear strength of various adhesives. Materials. 2023 Sep 12;16(18):6173.
  18. Instruments TA. A review of DSC kinetics methods. TA Instruments. 2010;73.
  19. Instruments, T. A. DSC Measurements of Epoxy Adhesives.2010 (TA055).
  20. Ramírez C, Rico M, Torres A, Barral L, López J, Montero B. Epoxy/POSS organic–inorganic hybrids: ATR-FTIR and DSC studies. European Polymer Journal. 2008 Oct 1;44(10):3035-45.
  21. Moussa O, Vassilopoulos AP, Keller T. Experimental DSC-based method to determine glass transition temperature during curing of structural adhesives. Construction and Building Materials. 2012 Mar 1;28(1):263-8.
Special Issue Subscription Original Research
Volume 13
Special Issue 06
Received 26/07/2025
Accepted 22/08/2025
Published 27/09/2025
Publication Time 63 Days
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