Study the Process of Siloxane Curing by Experimental and Numerical Simulation

IF 0.7 4区工程技术 Q4 ENGINEERING, CHEMICAL

Theoretical Foundations of Chemical Engineering Pub Date : 2024-03-10 DOI:10.1134/S0040579523330047

F. Nazari, S. Tavangar Roosta, M. A. Zarei, M. Mahyari, H. Soori, H. Moghimi Rad

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Abstract

Curing process of siloxane polymer was studied by determining rate of heat released during Dynamic DSC analysis. Utilizing thermokinetics software were calculated model-free methods such as Kissinger, Flynn–Wall–Ozawa, Friedman and also model-fitting methods such as Coats Redfern. To improve accuracy, Khavam Flanagan’s combined method was utilized and the third-order Avrami model was determined. Simulation of the curing process was done using OpenFOAM open-source software based on the finite volume method. Simulation results were validated using DSC Isothermal data. The results of the simulated sample were in good agreement with the experimental data. The curing time was investigated in cylindrical, spherical, and cubic shapes. The longest curing time was assigned to sphere geometry and the least to rectangular cubes with equal length and width. To achieve the optimal curing method, the influence of various parameters on the curing process of polysiloxane, including oven temperature, mold geometry, boundary conditions (effect of curing in a fan oven) and geometry dimensions, resin density, and thermal conductivity coefficient were investigated.

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通过实验和数值模拟研究硅氧烷固化过程

摘要通过确定动态 DSC 分析过程中的放热率，研究了硅氧烷聚合物的固化过程。利用热动力学软件计算了无模型方法（如 Kissinger、Flynn-Wall-Ozawa、Friedman）和模型拟合方法（如 Coats Redfern）。为了提高精确度，使用了 Khavam Flanagan 的组合方法，并确定了三阶 Avrami 模型。使用基于有限体积法的 OpenFOAM 开源软件对固化过程进行了模拟。模拟结果通过 DSC 等温数据进行了验证。模拟样品的结果与实验数据十分吻合。研究了圆柱形、球形和立方体形状的固化时间。球形固化时间最长，长宽相等的长方体固化时间最短。为了获得最佳固化方法，研究了各种参数对聚硅氧烷固化过程的影响，包括烘箱温度、模具几何形状、边界条件（在风扇烘箱中固化的影响）和几何尺寸、树脂密度和导热系数。

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来源期刊

Theoretical Foundations of Chemical Engineering 工程技术-工程：化工

CiteScore

1.20

自引率

25.00%

发文量

审稿时长

24 months

期刊介绍： Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.