Reuse of Pet Waste as Thermoplastic Composites

Abstract

Composite manufacturing from plastic wastes of polyethylene terephthalate (PET) type, sand-blasting represents a material recovery of the wastes. This process can be achieved, with the purpose of reducing the material consumption which is in deficit, production costs, and the duration of the technological processes. Thermoplastics composites obtained by a melting process at 170-200 o C, wastes incorporation and solidification in forms replace successfully the thermo rigid composites obtained from resins after a complicated technological process. So, it could be recovered, with minimal efforts, under reduced toxicological environmental conditions and extremely reduced energy consumptions, a significant variety of wastes, with related economical and ecological advantages. The paper presents the obtaining of thermoplastic material from PET wastes, sand, structurally evaluated and measured after the physical and mechanical properties.

Use of polymer concrete for large-scale 3D printing

“…The resulting composites appear to be suitable for rigid, thin-walled, temperature-stable parts (Slieptsova et al , 2016). The range of processing parameters and possible material combinations appear to be quite wide, as other authors reported that 0.62/1.22 mix of PET with contaminated blasting sand reached values as high as 87 MPa in compression and 27 MPa in flex, with temperature of processing extruder set between 185 and 195°C (Dumitrescu et al , 2011).…”

Functionalized 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD) as Novel Organocatalyst for Efficient Depolymerization of Polyethylene Terephthalate (PET) Wastes

“…In addition, aminolysis or ammonolysis of the polymer affords valuable monomers which are relevant for production of polyurethane [5,6]. However, the feasibility of the chemolytic depolymerization of PET waste is quite low at the moment due to the harsh reaction conditions required for the polymer scission as well as due the contamination of the products with metal salts from the used catalysts [7][8][9]. Organic catalysts were reported as attractive alternatives to traditional organometallic salts due to low working temperature and selective polymerization/depolymerization reactions [10][11][12][13][14][15][16].…”