Abstract This research article describes the impact of the depressurization rate change on the morphology of microcellular polycarbonate foams (PCMFs) using batch-wise foaming with carbon dioxide as a physical blowing agent. It was expected that the depressurization rate will affect the foaming behavior of microcellular foamed polycarbonate (PCMFs). While keeping other variables constant and changing depressurization rate, the depressurization rate affects the cell size, cell density, cell size distribution, and expansion ratio. The result showed cell diameter 5 ± 0.5, 7 ± 0.8, 9 ± 1.2, and 9.5 ± 1.5 µm and expansion ratio 5.2, 5.5, 6.0, and 6.3 at depressurization rate of 0.5 (D1), 0.05 (D2), 0.01 (D3), and 0.005 (D4) MPa/Sec, respectively. The cell area distribution showed that a higher depressurization rate leads to the more regular distribution of cells. The cell densities were observed as 2.6 × 1010, 4.6 × 109, 2 × 109, and 8.2 × 108 cells/cm3 at D1, D2, D3, and D4. It is investigated that as compare to depressurization rate other variables such as saturation pressure, foaming temperature and foaming time has more impact on properties of PCMFs. Graphical Abstract

中文翻译：

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固态微孔间歇发泡过程中减压诱导的形态控制

摘要 本研究文章描述了减压速率变化对使用二氧化碳作为物理发泡剂的分批发泡的微孔聚碳酸酯泡沫 (PCMF) 形态的影响。预计减压速率将影响微孔发泡聚碳酸酯 (PCMF) 的发泡行为。在保持其他变量不变并改变减压速率的同时，减压速率会影响泡孔尺寸、泡孔密度、泡孔尺寸分布和膨胀率。结果显示，在减压率为 0.5 (D1)、0.05 (D2)、0.01 (D) 时，细胞直径为 5 ± 0.5、7 ± 0.8、9 ± 1.2 和 9.5 ± 1.5 µm，膨胀比为 5.2、5.5、6.0 和 6.3 ) 和 0.005 (D4) MPa/Sec。细胞面积分布表明，较高的降压速率导致细胞分布更规则。在 D1、D2、D3 和 D4 观察到的细胞密度为 2.6 × 1010、4.6 × 109、2 × 109 和 8.2 × 108 个细胞/cm3。研究表明，与降压速率相比，其他变量如饱和压力、发泡温度和发泡时间对 PCMF 的性能影响更大。图形概要