Morano Chiara, Pagnotta Leonardo
Department of Mechanical, Energy and Management Engineering, University of Calabria, 87036 Rende, CS, Italy.
Polymers (Basel). 2023 Nov 17;15(22):4446. doi: 10.3390/polym15224446.
For different manufacturing processes, porosity occurs in parts made using selective laser sintering (SLS) technology, representing one of the weakest points of materials produced with these processes. Even though there are different studies involving many polymeric materials employed via SLS, and different manuscripts in the literature that discuss the porosity occurrence in pure or blended polymers, to date, no researcher has reported a systematic and exhaustive comparison of the porosity percentage. A direct comparison of the available data may prove pivotal in advancing our understanding within the field of additively manufactured polymers. This work aims to collect and compare the results obtained by researchers who have studied SLS's applicability to different amorphous or semi-crystalline polymers and pure or blended materials. In particular, the porosity values obtained by different researchers are compared, and tables are provided that show, for each material, the process parameters and the measured porosity values.
对于不同的制造工艺，使用选择性激光烧结（SLS）技术制造的零件中会出现孔隙率，这是这些工艺生产的材料最薄弱的环节之一。尽管有许多涉及通过SLS使用的多种聚合物材料的不同研究，以及文献中讨论纯聚合物或共混聚合物中孔隙率出现情况的不同手稿，但迄今为止，没有研究人员报告过孔隙率百分比的系统且详尽的比较。对现有数据进行直接比较可能对推进我们在增材制造聚合物领域的理解至关重要。这项工作旨在收集和比较研究人员在研究SLS对不同无定形或半结晶聚合物以及纯材料或共混材料的适用性时所获得的结果。特别是，比较了不同研究人员获得的孔隙率值，并提供了表格，展示了每种材料的工艺参数和测量的孔隙率值。
