Work

Simple Determination of the Melt Flow Index of Composite Polymer Filaments Used in Material Extrusion Additive Manufacturing

Year: 2023

Type: article

Abstract: The mechanical properties improving filler introduction into polymer filaments often lead to the formation of defects in 3D-printed products. Studying the bulk modification of polyethylene terephthalate glycol (PETG) filaments with 0.5–1.5 wt% of natural shungite and molybdenum disulfide, we found the melt flow index (MFI) value reduced by 18%–30%. We investigate the effect of bulk modification on the filaments’ rheological properties, develop a technique that eliminates typical additive prototyping defects by regulation of the extrusion parameters in Cura slicing software, and propose an effective method for the MFI-measurement of the 3D-printed filaments that does not require special laboratory equipment (plastometers).

Source: Coatings

DOI: 10.3390/coatings13091592

Authors: Fedor Doronin, Anna Rudakova, Georgy Rytikov, Victor Nazarov

Institution: Moscow Polytechnic University

Language: English

Topic: Additive Manufacturing and 3D Printing Technologies

Subfield: Industrial and Manufacturing Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,447

Funder: Ministry of Science and Higher Education of the Russian Federation