Understanding the Role of PBAT Content and Raster Orientation on the Mechanical Performance of Material Extrusion 3D-Printed PLA/PBAT Objects.

Sándor Kálmán Jakab, András Lajos Nagy, László Lendvai

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Article in Polymers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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3 authors.

Sándor Kálmán JakabDepartment of Materials Engineering and Machine Design, Széchenyi István University, H-9026 Győr, Hungary.ORCID 0009-0009-9688-6304

András Lajos NagyDepartment of Vehicle Propulsion Technology and Power Electronics, Széchenyi István University, H-9026 Győr, Hungary.ORCID 0000-0003-3551-7483

László LendvaiDepartment of Materials Engineering and Machine Design, Széchenyi István University, H-9026 Győr, Hungary.ORCID 0000-0003-3670-327X

Funding

National Research, Development and Innovation Office 2022-2.1.1-NL-2022-00012

6 · The paper itself

Abstract

Poly(lactic acid) (PLA) is the most widely used feedstock in material extrusion (MEX) 3D printing. In this study, PLA was combined with 0-40 wt.% of poly(butylene adipate-co-terephtalate) (PBAT) to improve its ductility. The resulting blends were processed into filaments suitable for MEX 3D printing and used to fabricate specimens for mechanical characterization using three distinct raster angles (RAs; 0°, ±45°, and 90°) to statistically evaluate the individual and joint effects of blend composition and raster orientation. Melt flow index (MFI) measurements showed that increasing PBAT content reduced the MFI from 40.4 g/10 min to 34.4 g/10 min, which led to weaker bonding between printed beads, as shown in scanning electron microscopic images. Tensile strength, modulus, and impact strength were evaluated using tensile and Charpy tests. Statistical analysis showed that RA, PBAT concentration, and their interaction all significantly influenced (

Indexed as

3D printingfused deposition modelingfused filament fabricationmaterial extrusionmechanical propertiespoly(butylene adipate-co-terephtalate)poly(lactic acid)raster angle

Identifiers

PMID41682047

DOI10.3390/polym18030339

PMCPMC12899600

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