Abstract
A bio-based epoxy resin was synthesized from cardanol which is natural renewable resource. Subsequently, diglycidyl ether of bisphenol A (DGEBA) was toughened with three different mass proportions of bio-based epoxidized cardanol–formaldehyde resin (ECF) (i.e., 20, 40, 60 mass%). In this study, the curing kinetics of amine-cured modified resin was studied by non-isothermal differential scanning calorimetry analysis. The apparent activation energy obtained by Kissinger and Flynn–Wall–Ozawa methods was 48 and 52 kJ mol−1, respectively. The two-parameter Šesták–Berggren autocatalytic model was used to obtain the reaction orders m and n. The curves obtained by the Malek method show good agreement with the experimental data for bio-based epoxy systems.
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Acknowledgements
The authors gratefully acknowledge the Principal and Management, PSG College of Technology, Coimbatore, for providing the necessary facilities. Sincere thanks are also due to IIT (Madras), Chennai, for NMR spectral studies.
Funding
This work was supported by the University Grants Commission (UGC), India, for financial assistance [Grant No. F. No. 39-804/2010 (SR)].
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Natarajan, M., Murugavel, S.C. Cure kinetics of bio-based epoxy resin developed from epoxidized cardanol–formaldehyde and diglycidyl ether of bisphenol–A networks. J Therm Anal Calorim 125, 387–396 (2016). https://doi.org/10.1007/s10973-016-5417-7
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DOI: https://doi.org/10.1007/s10973-016-5417-7