A comprehensive investigation into the curing kinetics of composites based on bisphenol A aniline benzoxazine resin (BA-a) and microcrystalline cellulose (MCC) modified by phosphorylation (MCC-pH), was conducted in this study. For this purpose, differential scanning calorimetry (DSC) analysis, at different heating rates, was used to examine the curing process. The kinetic parameters as a function of conversion were determined using isoconversional approaches, i.e., iterative Kissinger-Akahira-Sunose (it-KAS), Trache-Abdelaziz-Siwani methodology (TAS), and Vyazovkin methodology. The incorporation of MCC-pH reduced considerably the curing temperatures, indicating their catalytic effect. A combination of isoconversional methods and multi-step kinetic fitting was done to elucidate the effect of adding MCC-pH on BA-a curing. The reported data exhibited the enhanced reactivity of the composite systems, which was associated with the acceleration of the regular polymerization reaction. The possible pathway of the polymerization in the presence of phosphorylated cellulose was also discussed.

中文翻译：

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磷盐改性苯并恶嗪树脂与微晶纤维素复合材料的固化动力学

本研究对基于双酚A苯胺苯并恶嗪树脂（BA-a）和磷酸化（MCC-pH）改性微晶纤维素（MCC）的复合材料的固化动力学进行了全面研究。为此，使用不同加热速率下的差示扫描量热法（DSC）分析来检查固化过程。使用等转化方法，即迭代Kissinger-Akahira-Sunose (it-KAS)、Trache-Abdelaziz-Siwani 方法(TAS) 和Vyazovkin 方法，确定作为转化函数的动力学参数。 MCC-pH 的加入大大降低了固化温度，表明了它们的催化作用。结合等转化方法和多步动力学拟合来阐明添加 MCC-pH 对 BA-a 固化的影响。报告的数据显示复合系统的反应活性增强，这与常规聚合反应的加速有关。还讨论了在磷酸化纤维素存在下聚合的可能途径。