Fused Filament Deposition of PLA: The Role of Interlayer Adhesion in the Mechanical Performances.

ABSTRACT: A set of criteria to enhance mechanical performances of standard specimens (Type V, ANSI D368) made of polylactic acid (PLA) were proposed. Fused PLA deposition was conducted with nozzle temperature ranging from 180 to 230 °C and deposition plate temperature ranging from 70 to 110 °C. Optical microscopy, elastic modulus analysis and density measurement allowed emphasizing the effect of temperature field, also measured during the process, on the morphology and the mechanical characteristics of the specimen. Atomic force microscopy revealed a morphology typical of amorphous samples with globular structures. Poor interlayer adhesion was detected in the part of the specimen located at larger distance from the deposition plate, showing an elastic modulus lower than those measured in the central

SUBMITTER: Liparoti S 

PROVIDER: S-EPMC7865617 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature