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Mechanical characterization of Thermoplastic Polyolefin (TPO) foams.

机译：热塑性聚烯烃（TPO）泡沫的机械特性。

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This thesis investigated the effect of cellular morphologies on mechanical properties of Thermoplastic Polyolefin (TPO) cellular foams. Cellular closed-cell TPO foams were prepared using a two-stage batch method and injection molding process. The microstructure of these foamed samples was controlled by carefully altering the processing parameters of two different foaming processes. The foam morphologies were characterized in terms of the cell density, foam density and average cell size. Tensile properties, elastic recovery and impact resistance of various foamed TPO samples were correlated with different foam morphologies. This research is summarized in three major findings: (1) The weight reduced TPO can be achieved without sacrificing much of the mechanical strength by introducing cellular structure in the materials, (2) the elastic recovery of the TPO can be significantly improved by the cellular structure in the materials and (3) the impact resistance of the TPO foams is significantly reduced by the cellular structure in the materials.
机译：本文研究了多孔形态对热塑性聚烯烃（TPO）多孔泡沫力学性能的影响。多孔闭孔TPO泡沫是使用两阶段分批方法和注塑工艺制备的。这些发泡样品的微观结构通过小心地改变两种不同发泡工艺的加工参数来控制。根据泡孔密度，泡沫密度和平均泡孔尺寸表征泡沫形态。各种泡沫TPO样品的拉伸性能，弹性恢复和抗冲击性均与不同的泡沫形态相关。这项研究总结了三个主要发现：（1）通过在材料中引入孔结构，可以在不牺牲很多机械强度的情况下实现TPO的轻量化；（2）通过孔可以显着改善TPO的弹性回复率材料中的孔结构和（3）材料中的孔结构显着降低了TPO泡沫的抗冲击性。

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