Development of 3D-Printing Filament from Recycled Low-Density Polyethylene (rLDPE) and High-Density Polyethylene (rHDPE) Composites Reinforced with Lignin Additive
Nikolaos Pardalis·Eleftheria Maria Pechlivani·Nina Maria Ainali·Panagiotis A. Klonos·Apostolos Kyritsis·Konstantinos Spyrou·Dimitrios Ν. Bikiaris·Zoi Terzopoulou·Sotirios Pemas
This study investigates the development of sustainable composite materials using recycled low-density polyethylene (rLDPE) and high-density polyethylene (rHDPE) in an 80/20 mass ratio, incorporating kraft lignin as a bio-derived additive and polyethylene-graft-maleic anhydride (PE-g-MA) as a compatibilizer. Reactive melt mixing was employed to produce composites with varying lignin loadings (1, 3, 5, and 10 wt%). The structural, thermal, and mechanical properties and segmental dynamics of the ma