Wissam Bessa , Djalal Trache , Chahinez Ghalmi , Sabrine Aidi , Ahmed Fouzi Tarchoun , Feriel Gahfif , Amir Abdelaziz , Sourbh Thakur , M. Hazwan Hussin
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引用次数: 0
摘要
本研究对基于双酚 A 苯胺苯并恶嗪树脂(BA-a)和经磷酸化改性的微晶纤维素(MCC)(MCC-Ph)的复合材料的固化动力学进行了全面调查。为此,在不同的加热速率下使用了差示扫描量热法(DSC)分析来研究固化过程。采用等转化法,即基辛格-阿卡希拉-苏诺塞迭代法(it-KAS)、特拉奇-阿卜杜拉齐兹-西瓦尼法(TAS)和维亚佐夫金法,确定了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,表明其具有催化作用。为了阐明添加 MCC-Ph 对 BA-a 固化的影响,结合了等转化方法和多步动力学拟合方法。所报告的数据表明,复合体系的反应性得到了增强,这与常规聚合反应的加速有关。此外,还讨论了磷酸化纤维素存在时聚合反应的可能途径。
Curing kinetics of composites based on benzoxazine resin and microcrystalline cellulose modified by phosphorus salt
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.
期刊介绍:
Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application.
The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta.
The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas:
- New and improved instrumentation and methods
- Thermal properties and behavior of materials
- Kinetics of thermally stimulated processes