Abstract

In this study, characterization processes have been done by synthesizing the nano-aerosil-reinforced polyester composite. Chemical bonds formed in polyester composites were examined with FTIR spectrum and thermal stability with proportional integral derivative (PID) system. With the PID system, the drying kinetics of nano-polyester composites were examined from room temperature to 378 K, and thermal decomposition kinetics up to 918 K. The effect of temperature separates volatile components and physical impurities from the structure in the first region. Chemical decomposition starts in the second region, and degradation is the fastest step. Thermal degradation slows in the third region, and the remaining cross-linked components shift away from the structure.

According to the new special solution method, the most suitable function in the thermal decomposition kinetics of polyester nanocomposites was found in the second-order model (f (δ) = (1–δ)², E: 53.492 kJ/mol, R²: 0.99686, for experiment 3). Also, with three-dimensional diffusion and Jander functions have been found better results using Coats-Redfern method (R²: 0.99882, E: 50.55141 kJ/mol for experiment 3). The most consistent results in drying kinetics of polyester nanocomposites were found in the Midilli and Kucuk model (R²: 0.99575, RMSE: 0.03099 for experiment 1).

摘要

在这项研究中，通过合成纳米气硅增强聚酯复合材料来完成表征过程。用 FTIR 光谱和比例积分导数 (PID) 系统检查了聚酯复合材料中形成的化学键。通过PID系统，纳米聚酯复合材料的干燥动力学从室温到378 K，热分解动力学高达918 K。温度的影响将挥发性成分和物理杂质从第一区域的结构中分离出来。化学分解在第二个区域开始，降解是最快的一步。第三个区域的热降解减慢，剩余的交联成分从结构中移开。

根据新的特殊解法，聚酯纳米复合材料的热分解动力学中最合适的函数是在二阶模型中发现的（f (δ) = (1–δ) ² , E: 53.492 kJ/mol, R ² : 0.99686，对于实验 3)。此外，使用 Coats-Redfern 方法 ( R ² : 0.99882, E: 50.55141 kJ/mol 用于实验 3)已发现使用三维扩散和詹德函数获得更好的结果。在 Midilli 和 Kucuk 模型中发现了聚酯纳米复合材料干燥动力学最一致的结果（R ²：0.99575，RMSE：0.03099 实验 1）。