Abstract
This paper is focused on the preparation of novel hybrid polymer composite materials for 3D filaments. As the reinforcing filler, expanded graphite, carbon fibers, and combinations thereof were used in various ratios up to 10%. The mechanical and thermal properties of virgin and recycled polyethylene phthalate glycol-modified (PETG) composite materials were determined. Almost all prepared composite materials were suitable for 3D printing and they have enhanced mechanical properties compared to the neat PETG matrices. Addition of the fillers to both polymer matrices has an only slight effect on the thermal stability, but the addition of carbon fibers significantly reduced the thermal expansion coefficient. The composites from cheaper recycled PETG have comparable properties to virgin PETG composites, which is of economic and ecological importance. New and cheaper materials can help expand 3D printing to manufacturing plants and the use of 3D printers for special applications.
Highlights
The beginnings of 3D printing date back to 1984, when Charles W
The main aim was to produce and characterize a composite material that could be used for the fused filament fabrication (FFF) 3D printing method and later to replace the virgin polymer matrix with a recycled polymer matrix without losses of properties but with a decreased price
polyethylene terephthalate (PET) does not contain 1,4-CHDM and has a density of 1.38 g·cm−3 according to the literature, virgin PETG has a measured density of 1.27 g·cm−3, and the recycled PETG
Summary
The beginnings of 3D printing date back to 1984, when Charles W. Many specialized companies selling 3D printers focused on research activities, and they want to provide a competitive advantage They try to improve the printing technique and prepare new materials that could be used for the most demanding professional applications. PETG copolymer has noticeable tensile toughness, transparency, flexibility, high processability, and excellent chemical resistance [15] It can be used for many applications and in recent years PETG has become popular in 3D printing [16]. The main aim was to produce and characterize a composite material that could be used for the fused filament fabrication (FFF) 3D printing method and later to replace the virgin polymer matrix with a recycled polymer matrix without losses of properties but with a decreased price
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