This study concerns the evaluation of several properties/characteristics of 3D printed poly(lactic acid) (PLA) polymer and acrylonitrile–butadienestyrene (ABS) copolymer, recycled from food packages and car dashboards, respectively. The aim is to evaluate the potential of recycled polymers that are recovered from solid polymer waste (SPW) to be reused for functional components/parts for add-value applications. The study compared the performance of the recycled material with the obtained from the 3D printing of virgin polymer. The characterization was made considering the chemical, thermal and mechanical properties as well as surface roughness and wettability. Although the thermal characterization did not indicate significant variations between recycled and virgin material, the mechanical recycling process induced some chain scission in PLA.

Consequently, the semi-crystalline polymer revealed losses of 33% both in tensile stress and flexural strength. On the contrary, recycled ABS did not show changes in the mechanical properties of the printed specimens. Both recycled polymers produced smoother surfaces with a decrease of the mean surface roughness between 55% and 65%. Considering the properties required by manufacturers of food containers and car dashboards, this study indicates that recycled materials can be reused for the same applications.

这项研究涉及分别从食品包装和汽车仪表板上回收的3D打印聚乳酸聚合物和丙烯腈-丁二烯苯乙烯共聚物的几种性能/特性的评估。目的是评估从固体聚合物废料（SPW）中回收的可循环再利用聚合物用于功能性组件/零件以实现增值应用的潜力。该研究将再生材料的性能与3D打印原始聚合物获得的性能进行了比较。进行表征时要考虑化学，热和机械性能以及表面粗糙度和润湿性。尽管热特性未表明回收材料与原始材料之间存在显着差异，但机械回收过程在PLA中引起了一些断链。

因此，半结晶聚合物在拉伸应力和弯曲强度上均损失了33％。相反，回收的ABS没有显示出印刷样品的机械性能变化。两种回收的聚合物均产生更光滑的表面，平均表面粗糙度降低了55％至65％。考虑到食品容器和汽车仪表盘制造商所需的性能，该研究表明，回收的材料可以重复用于相同的应用。