Almond shell-modified urea–formaldehyde resins (AUF) were prepared in this study. The optimal addition amount of almond shells was selected by formaldehyde emission and wet shear strength. The activation energy (E_a) values at different conversion rates and the reaction kinetics were estimated based on the Flynn–Wall–Ozawa method. The results indicated that almond shells can significantly reduce the formaldehyde emission and increase wet shear strength and thermal stability of the urea–formaldehyde resin adhesive. The optimal addition of almond shells is 3 wt %.

中文翻译：

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杏仁壳改性脲醛树脂的热降解动力学

本研究制备了杏仁壳改性脲醛树脂 (AUF)。根据甲醛释放量和湿剪切强度选择杏仁壳的最佳添加量。基于Flynn-Wall-Ozawa方法估计不同转化率下的活化能（E _a）值和反应动力学。结果表明，杏仁壳可以显着降低甲醛释放量，提高脲醛树脂粘合剂的湿剪切强度和热稳定性。杏仁壳的最佳添加量为 3 wt%。