Mechanical tests at sub-micron scales using force microscopy are often used for the characterization of materials. Here we report the mechanical, tribologic, and morphological characterization of recycled polypropylene beads using force spectroscopy and lateral-force microscopy. The compression-elastic moduli calculated using the Hertzian model for polypropylene beads was between 0.448 ± 0.010 and 1.044 ± 0.057 GPa. The grain size analysis revealed a significant correlation between the grain size and measured compression-elastic moduli. Friction-maps of recycled polypropylene beads obtained using lateral-force microscopy were also reported for 25 μm² scanning areas.

中文翻译：

---

使用原子力显微镜对回收聚丙烯珠进行机械测试和摩擦映射

使用力显微镜进行的亚微米级机械测试通常用于表征材料。在这里，我们使用力谱和横向力显微镜报告回收聚丙烯珠的机械、摩擦学和形态学特征。使用聚丙烯珠的赫兹模型计算的压缩弹性模量在 0.448 ± 0.010 和 1.044 ± 0.057 GPa 之间。晶粒尺寸分析揭示了晶粒尺寸和测量的压缩弹性模量之间的显着相关性。还报道了使用横向力显微镜获得的回收聚丙烯珠的摩擦图，用于 25 μm ²扫描区域。