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Investigation of kinetic triplets for thermal degradation of thermally cured vinyl ester resin systems and lifetime predictions

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Abstract

The thermal degradation of thermally cured vinyl ester resin systems is studied for different heating rates. The kinetic triplets, the activation energy, pre-exponential factor and the reaction model f(α) for the different reaction extent of conversions (α) are estimated using advanced isoconversional methods. Although the thermal degradation curves show the degradation occurs as a single stage, the kinetic parameters suggest the otherwise. The activation energy remains constant for α = 0.3–0.575 but varies during the initial and final stages of conversion. Similarly, the pre-exponential factor shows considerable variation between the lower and higher reaction extent (α) values. This shows the complexity in the reaction. The probable reaction mechanism that the degradation follows has been explained. The complexity of the thermal degradation and the changes in reaction model f(α) over different reaction extent has been related. The appropriate working temperature for different thermal lifetime of the cured vinyl ester resin system for the failure of conversion α = 0.2 has been predicted under the nitrogen atmosphere.

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Authors and Affiliations

  1. Department of Mechanics, Mathematics and Management, Politecnico di Bari, Viale Japigia 182, 70126, Bari, Italy

    Paramsamy Kannan Vimalathithan & Claudia Barile

  2. Department of Polymer Technology, Kamaraj College of Engineering and Technology, S.P.G.C. Nagar, K. Vellakulam, 625 701, India

    Chinnaswamy Thangavel Vijayakumar

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  1. Paramsamy Kannan Vimalathithan
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  2. Claudia Barile
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  3. Chinnaswamy Thangavel Vijayakumar
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Correspondence to Paramsamy Kannan Vimalathithan.

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Vimalathithan, P.K., Barile, C. & Vijayakumar, C.T. Investigation of kinetic triplets for thermal degradation of thermally cured vinyl ester resin systems and lifetime predictions. J Therm Anal Calorim 133, 881–891 (2018). https://doi.org/10.1007/s10973-018-7154-6

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  • DOI: https://doi.org/10.1007/s10973-018-7154-6

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