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Cure kinetics and thermal degradation characteristics of epoxy/polyetheramine systems

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Abstract

In this paper, we report detailed cure kinetics of epoxy and polyetheramine (Jeffamine) systems. Three cured epoxy networks were prepared by using three types of Jeffamines having different molecular masses and polyether segment in the chain. The effect of epoxy to Jeffamine stoichiometric and sub-stoichiometric ratios and molecular mass of Jeffamines on curing behaviour, mechanical properties and thermal behaviour of the resulting networks were investigated. The results were explained using Fourier transform infrared (FTIR) spectroscopic analysis. The epoxy systems with optimised epoxy/amine ratios were studied for their cure behaviour using temperature modulated differential scanning colorimetric (MDSC) analysis. Isoconversion kinetics was studied to find out activation energy, pre-exponential factor. The conversion function, f(a) was found to be fitting as Sestak–Berggren model. Thermal behaviour of the epoxy networks was determined by a non-isothermal thermogravimetric analysis (TGA) both in nitrogen and air envelop. The thermal stability of the rubbery epoxy systems is observed to be much better than the conventional rubbers having unsaturation.

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  1. Naval Materials Research Laboratory, Shil-Badlapur Road, Anand Nagar PO, District Thane, Maharashtra, 421506, India

    Debdatta Ratna, S. B. Jagtap, R. Nimje & B. C. Chakraborty

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  1. Debdatta Ratna
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  2. S. B. Jagtap
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DR contributed to conceptualization, data analysis, manuscript writing. SBJ FTIR contributed to mechanical testing and data analysis. RN DSC contributed to analysis. BCC contributed to Kinetics and model analysis, manuscript writing.

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Correspondence to Debdatta Ratna.

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Ratna, D., Jagtap, S.B., Nimje, R. et al. Cure kinetics and thermal degradation characteristics of epoxy/polyetheramine systems. J Therm Anal Calorim 149, 1073–1087 (2024). https://doi.org/10.1007/s10973-023-12737-6

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