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Abstract Increasing environmental pollution and the depletion of resources have led industrial and academic circles to focus on the development of renewable resource materials. Vegetable oils and their derivatives are potential raw materials for polymers. Therefore, the curing kinetics of new grease-based resins It is instructive. To in-depth understand the chemical reactions involved in the synthesis and curing of C36 dimer fatty acid-base unsaturated polyester resin, the curing process was studied by FT-IR, 1H NMR and differential scanning calorimetry. The results of FT-IR and 1H NMR analysis of the polyester showed that the C36-DFA modified polyester was successfully synthesized by polycondensation reaction. TGA analysis showed that the DFA-UPR exhibited a relatively high decomposition temperature of 197.83 ℃. At the same time, the thermal weight loss rate of DFA-UPR at Tm2 temperature is 39.56%/℃, which is 30.13% lower than that of UPR.According to the Kissinger method and the Crane method, the activation energies of the DFA-UPR and UPR resin systems were 32.99 kJ/mol and 33.68 kJ/mol, respectively; the reaction order fluctuated around 0.85, and the pre-exponential factors were 1.89×104 and 3.11×104, respectively. The DFA-UPR resin curing reaction conforms to the Sesta'k-Berggren autocatalytic model.
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2020, Vol. 33 
