Impact of Boundary Heat Losses on Frontal Polymerization
Impact of Boundary Heat Losses on Frontal Polymerization
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DOI：
10.1021/acs.jpcb.0c03107
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发表时间：
2020-07-23
影响因子：
3.3
通讯作者：
Geubelle, P. H.
中科院分区：
文献类型：
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作者：
Goli, E.;Gai, T.;Geubelle, P. H.
前沿聚合（FP）被认为是热固性聚合物和复合材料的传统制造技术的更快且节能的替代方案，其建立在树脂体系的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上。然而，向周围的热损失可能会破坏这种热平衡，减缓并可能使锋面熄灭。本文研究了两种类型的热损失对周围的聚合前沿的关键特性（传播速度和最高温度）的影响：对流热损失沿着反应通道的边界和接触热损失在通道工具板接口。使用非线性自适应全耦合有限元求解器进行数值分析。
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.