Abstract
The curing kinetics of the epoxy resin/nano rare earth oxides system were studied by non-isothermal differential scanning calorimetry. Curing reaction occurred with DSC thermal analyzers at heating rates of 5, 10, 15, and 20 K/min, respectively. Data on enthalpy changes during heating were collected. The kinetic parameters and curing temperature of the curing reaction of the epoxy resin/ nano rare earth oxides system were calculated by Kissinger–Ozawa, Crane method and T-β extrapolation method. The results showed that the rare earth compounds reduced the activation energy of the epoxy resin curing reaction, but did not change the curing mechanism of the epoxy resin. Studies on the influence of sample fracture morphology showed that the introduction of nano rare earth compounds plays an important role in improving the tensile properties of nanocomposites. When the 1% weight component of nano Gd2O3 was added to the composite, the tensile strength of the composite increased by 65.18%, the flexural strength and modulus increased by 57.92 and 70.04%, respectively, and the glass transition temperature increased by 17.55°C.
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Funding
The authors gratefully acknowledge the National Natural Science Foundation of China (no. 52373102), the Key Research and Development Program of Tian** (no. 22YFXTHZ00010, no. 22YFZCSN00040), Tian** Education Commission Scientific Research Program Project (no. 2020KJ053) and the Graduate Research and Innovation Program of Tian** (no. 2021YJSS349, no. 2022SKYZ182).
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Junwei Li, Lu, W., Yang, D. et al. A Novel Rare Earth Enhanced Epoxy Composites: Mechanical Properties, Thermal Stability and Curing Kinetics. Polym. Sci. Ser. B (2024). https://doi.org/10.1134/S1560090424600529
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DOI: https://doi.org/10.1134/S1560090424600529