Abstract The performance of Polystyrene microporous foaming (PS-MCF) materials is influenced by their microstructures. Therefore, it is essential for industrializing them to investigate the relationship between their microstructure and material properties. In this study, the relationship between the microstructure, compressive property, and thermal conductivity of the PS-MCF materials was studied systematically. The results show that the ideal foaming pressure of PS-MCF materials, obtaining compression performance, is around 20 MPa. In addition, the increase of temperature causes the decrease of sample density. It effects that the compression modulus and strength increase with the decrease of foaming temperature. Because the expansion rate and cell diameter of the PS-MCF materials reduce the thickness of cell wall, they are also negatively correlated with their mechanical properties. Moreover, there is a negative linear correlation between the thermal conductivity and cell rate, whereas the cell diameter is positively correlated with the thermal conductivity.

中文翻译：

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微观结构对聚苯乙烯微孔发泡材料性能的影响

摘要 聚苯乙烯微孔发泡（PS-MCF）材料的性能受其微观结构的影响。因此，研究它们的微观结构与材料性能之间的关系对于它们的工业化至关重要。本研究系统地研究了PS-MCF材料的微观结构、压缩性能和热导率之间的关系。结果表明，获得压缩性能的 PS-MCF 材料的理想发泡压力约为 20 MPa。此外，温度升高导致样品密度降低。它影响压缩模量和强度随着发泡温度的降低而增加。由于 PS-MCF 材料的膨胀率和细胞直径降低了细胞壁的厚度，它们还与其机械性能呈负相关。此外，热导率与泡孔率呈负线性相关，而泡孔直径与热导率呈正相关。