Goli E, Gai T, Geubelle P H
Department of Civil and Environmental Engineering, University of Illinois, Urbana, Illinois 61801, United States.
The Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801, United States.
J Phys Chem B. 2020 Jul 23;124(29):6404-6411. doi: 10.1021/acs.jpcb.0c03107. Epub 2020 Jul 9.
Considered as a faster and energy-efficient alternative to conventional manufacturing techniques for thermosetting polymers and composites, frontal polymerization (FP) is built on a thermal equilibrium between the heat generated by the exothermic reaction of the resin system and the heat consumed by the advancing front. However, a heat loss to the surrounding may disrupt this thermal equilibrium and slow down and possibly quench the front. This paper investigates the impact of two types of heat loss to the surrounding on the key characteristics (propagation speed and maximum temperature) of the polymerization front: convective heat loss along the boundary of the reaction channel and contact heat loss at channel-tool plate interfaces. The analysis is performed numerically using a nonlinear, adaptive fully coupled finite element solver.
作为热固性聚合物和复合材料传统制造技术的一种更快且节能的替代方法，前沿聚合（FP）基于树脂系统放热反应产生的热量与前进前沿消耗的热量之间的热平衡。然而，向周围环境的热损失可能会破坏这种热平衡，减慢并可能终止前沿。本文研究了两种向周围环境的热损失对聚合前沿关键特性（传播速度和最高温度）的影响：沿反应通道边界的对流热损失以及通道-工具板界面处的接触热损失。使用非线性、自适应全耦合有限元求解器进行了数值分析。
