ABSTRACT

As desktop three-dimensional (3D) printing has gained popularity over a wide range of settings, the use of polylactic acid (PLA) has increased commensurately due to the perceived positive safety and environmental qualities of the material. Though there are currently several manufacturers of PLA for fused filament fabrication (FFF) platforms, Ingeo grade 4043D (NatureWorks, LLC, Minnetonka, MN, USA) is widely used amongst the 3D printing community. The work presented here compares two grades of commercially available PLA that have been marketed to the 3D printing community. Here, the former ‘gold standard’, PLA Grade 4043D, is compared to the newer grade, 3D870. Mechanical properties, rheological characteristics, chemical qualities, and the ability to manipulate the crystallinity of the material were compared between the two. A detailed fracture surface analysis of tensile specimens was also performed that revealed distinct differences in crack propagation behaviour between the two materials in the annealed and non-annealed conditions.

摘要

随着台式机三维（3D）打印在各种设置中得到普及，聚乳酸（PLA）的使用也相应增加，这归因于该材料的积极安全性和环境质量。尽管目前有几家用于熔丝制造（FFF）平台的PLA制造商，但Ingeo 4043D级（美国明尼苏达州Minnetonka的NatureWorks，LLC）在3D打印社区中得到了广泛使用。此处介绍的工作比较了已出售给3D打印社区的两种等级的市售PLA。在这里，将以前的“黄金标准” PLA 4043D与较新的3D870进行了比较。在两者之间比较了机械性能，流变特性，化学质量和操纵材料结晶度的能力。