Rapid frontal polymerization achieved with thermally conductive metal strips
Rapid frontal polymerization achieved with thermally conductive metal strips
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DOI：
10.1063/5.0052821
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发表时间：
2021-07-01
期刊：
影响因子：
2.9
通讯作者：
Geubelle, Philippe H.
中科院分区：
文献类型：
--
作者：
Gao, Yuan;Shaon, Fahima;Geubelle, Philippe H.
正面聚合是一种快速、节能、环保的制备轻质、高性能热固性聚合物和复合材料的方法，它涉及自蔓延聚合反应前沿。以前的工作已经报道，导热元件的引入可以提高前缘速度。作为后续研究，本文采用数值计算和实验相结合的方法，通过研究铝带和铜带嵌入树脂时的前缘形状、前缘宽度和热交换，对这一问题进行了较为系统的研究。研究表明，前缘速度的增强主要是由于与导电元件相关的预热效应。此外，对系统尺寸的数值参数研究表明，前锋速度随着系统尺寸的减小而增加，最终接近聚合物-金属复合材料的均化模型所提供的预测。由AIP出版公司独家授权出版。
Frontal polymerization, which involves a self-propagating polymerizing reaction front, has been considered as a rapid, energy-efficient, and environmentally friendly methodology to manufacture lightweight, high-performance thermoset polymers, and composites. Previous work has reported that the introduction of thermally conductive elements can enhance the front velocity. As follow-up research, the present work investigates this problem more systemically using both numerical and experimental approaches by investigating the front shape, front width, and heat exchange when aluminum and cooper metal strips are embedded in the resin. The study reveals that the enhancement in the front velocity is mainly due to a preheating effect associated with the conductive element. Moreover, the numerical parametric study for the system size shows that the front speed increases as the system size decreases, ultimately approaching a prediction provided by a homogenized model for polymer-metal composites. Published under an exclusive license by AIP Publishing.