Thermal, Rheological and Mechanical Properties of PETG/rPETG Blends

Abstract

This paper presents the reuse process of post-consumer printed foils made of glycol-modified poly(ethylene terephthalate) (PETG). Fourier-transform infrared spectroscopy and a scanning electron microscope confirmed that these foils consist of PETG and PS layers. Firstly, foil pieces were immersed in the organic solution to remove all prints and after washing and drying they were extruded into regranulate rPETG pellets. Three types of PETG/rPETG blends were fabricated with the addition of 10, 20 and 30 wt% of virgin PETG. Microscopic analysis of the blends confirmed their homogeneity, as was also shown by the fact that there was only one glass transition peak in the heating curve given by differential scanning calorimetry. Moreover, in the presence of fresh PETG the degradation temperatures of rPETG improved significantly, and the viscosity of all blends was reduced as a result of shortened macromolecule chains in rPETG. Mechanical analysis of the materials showed that all blends have comparable tensile strength and a Young's modulus that is higher than rPETG but lower than virgin PETG. Elongation at break decreases together with the content of rPETG.

Product Design by Additive Manufacturing for Water Environments: Study of Degradation and Absorption Behavior of PLA and PETG

“…The printing parameters selected to print the aforementioned specimens are reflected in Table 1, following the material supplier indications. Thermogravimetric analysis (TGA) determined the degradation temperature of the samples, as the degradation temperature range of PETG is over 350 • C [37].…”

“…The printing eters selected to print the aforementioned specimens are reflected in Table 1, fo the material supplier indications. Thermogravimetric analysis (TGA) determined radation temperature of the samples, as the degradation temperature range of over 350 °C [37]. The microscopic analysis was performed using an optical microscope with a resolution (Rohs™), connected to a computer that enabled the researchers to re images used for the analysis.…”

The effect of 3D structure design on fire behavior of polyethylene terephthalate glycol containing aluminum hypophosphite and melamine cyanurate

“…It must be noted that the thermal degradation of PET-G during cone calorimeter test leads also to products with low viscosity. 51 Despite visual inspection of sample during test did not reveal convective patterns (indicative of melting), we cannot exclude that a fraction of melt products formed causing additional mixing of flame retardants, altering the prevalent mechanism of action and impacting on their synergistic effect. 52 sample deformation during test might also affect the results of flammability test.…”

Sustainable Additive Manufacturing: Mechanical Response of Polyethylene Terephthalate Glycol over Multiple Recycling Processes

“…PETG is a modified PET polymer filled with glycol (which allows for better processability in the FFF manufacturing method) which is still able to preserve food compliance [ 20 ]. PETG can be produced through recycling processes either from products originally manufactured with PETG or from virgin PET produced by adding glycol [ 21 ]. PETG can be used in a wide range of applications due to its superior mechanical properties compared to PET polymer and its ease of use in 3D printing FFF processes.…”