Bubble growth in mold cavities during microcellular injection molding processes
Bubble growth in mold cavities during microcellular injection molding processes
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DOI：
10.1007/s12206-009-0913-3
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发表时间：
2009-12
影响因子：
1.6
通讯作者：
Y. Moon;K. Lee;S. Cha
中科院分区：
文献类型：
--
作者：
Y. Moon;K. Lee;S. Cha
气泡的成核和生长是聚合物泡沫生成过程中的关键步骤。泡沫聚合物的机械性能与材料内部产生的气泡大小密切相关，大多数现有的分析方法使用恒定的粘度和表面张力来预测气泡的大小。然而，在实际情况下，当聚合物含有气体时，粘度和表面张力发生变化，导致估计和观察到的气泡尺寸之间的差异。因此，我们开发了一个理论框架，以提高我们的气泡生长速率和尺寸的预测，并通过实验验证了我们的理论结果，使用注塑机修改，使微孔泡沫产品。
Bubble nucleation and growth are the key steps in polymer foam generation processes. The mechanical properties of foam polymers are closely related to the size of the bubbles created inside the material, and most existing analysis methods use a constant viscosity and surface tension to predict the size of the bubbles. Under actual situations, however, when the polymer contains gases, changes occur in the viscosity and surface tension that cause discrepancies between the estimated and observed bubble sizes. Therefore, we developed a theoretical framework to improve our bubble growth rate and size predictions, and experimentally verified our theoretical results using an injection molding machine modified to make microcellular foam products.