Mechanical and processing properties of recycled PET and LDPE-HDPE composite materials for building components

Laría, Julián González; Gaggino, Rosana; Kreiker, Jerónimo; Peisino, Lucas Ernesto; Positieri, María Josefina; Cappelletti, Ariel Leonardo

doi:10.1177/0892705720939141

Cited by 29 publications

(14 citation statements)

References 27 publications

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“…Although several reports can be found in the literature about the recycling of plastic materials, only a few focus on recovering and molding them in a new process. Laria et al (2020) analyzed the mechanical properties of a material formed by 100% recycled plastics: polyethylene terephthalate and low-/high-density polyethylene without previous separation or washing and drying pretreatments. Its macro and microscopic structure were studied and described, and formulations of different compound rates were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Production and Optimization of GLP-HDPE Composite Materials Using the Robust Taguchi Technique

JATAU¹,

Yawas²,

Kuburi³

et al. 2022

Preprint

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With the increase in the use of high-density polyethylene (HDPE) products and the serious long-term hazard it poses to the environment, there has been an increasing need to decrease the release of these materials to the environment as waste. This study sets out to develop and optimize the mechanical properties of GLP-HDPE composite, a sustainable material from agro residues (ginger leaves particles (GLP)) and high-density polyethylene waste materials. The Taguchi robust technique, analysis of variance, and regression analysis were employed to optimize, analyze and model the behavior of the composite materials in respect to developmental factors of particle size and particle content. The optimum bending modulus of elasticity (MOE), modulus of rupture (MOR) and impact energy (IE) of the developed composites was 2490MPa, 11.90MPa, and 4.1J at particle size/particle content combination of 710µm/35%, 520µm/35%, and 710µm/45% respectively. Analysis of variance at 95% confidence level showed that the particle content and a significant effect on the MOE, MOR, and IE of the GLP-HDPE composite with a minimum percentage contribution of 71.61%. Equations for predicting the MOE, MOR, and IE of the composites were developed with good prediction accuracy.

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Section: Introductionmentioning

confidence: 99%

Production and Optimization of GLP-HDPE Composite Materials Using the Robust Taguchi Technique

JATAU¹,

Yawas²,

Kuburi³

et al. 2022

Preprint

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“…The waste in the form of plastic has been increasing day by day and prediction has been made that it will be in abundance in near future [1]. The disposal of solid plastic waste through burning will cause more pollution due to release of toxic gases [2].…”

Section: Introductionmentioning

confidence: 99%

“…The waste in the form of plastic has been increasing day by day and prediction has been made that it will be in abundance in near future. 1 The disposal of solid plastic waste through burning will cause more pollution due to the release of toxic gases. 2 Commercially the thermoplastics are being recycled but recycling of thermosetting has many challenges (such as technological and cost-effective issues).…”

Section: Introductionmentioning

confidence: 99%

On comparison of recycled LDPE and LDPE–bakelite composite based 3D printed patch antenna

Singh

Kumar

Singh

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the past two decades number of studies have been reported on the use of thermoplastics as a substrate for 3D printed patch antennas. However, no work has been reported on the thermoplastic-thermosetting composite-based substrate for 3D printed patch antennas and their mechanical, morphological, rheological, and radiofrequency (RF) characterization for sensing applications. In this study low-density polyethylene (LDPE) and LDPE-5% bakelite (BAK) composite-based patch antenna (resonating frequency 2.45 GHz) were printed (for secondary recycling) on fused deposition modeling (FDM) setup. The RF characteristics were measured using a vector network analyzer (VNA). Ring resonator test was used for measuring the dielectric properties of substrates (which suggests that the dielectric constant ([Formula: see text]) and loss tangent ([Formula: see text]) for LDPE was 2.282 and 0.0045, whereas for LDPE-5%BAK the calculated [Formula: see text] and [Formula: see text] was 2.0663, 0.0051 respectively). This study highlights that for the LDPE-5%BAK composite there was a marginal increase in the size of the patch antenna; but this resulted in improved transmittance, gain, and return loss for typical sensor applications. As regards to printability of substrate, 5% BAK resulted in a melt flow index (MFI) of 9.96 g/10 min in contrast to 12.208 g/10 min for a neat LDPE sample. The selected LDPE-5%BAK composite resulted in peak strength (PS) and break strength (BS) of 16.08 MPa and 14.47 MPa (at 180 °C screw temperature, 110 rpm, and 11 kg load) while processing with a twin-screw extruder (TSE), which was observed better than the neat LDPE (PS 11.98 MPa, BS 10.79 MPa). The results were supported with porosity (%), surface roughness (Ra) analysis based upon scanning electron microscopy (SEM) and bond strength using attenuated total reflection (ATR) based Fourier transformed infrared (FTIR) analysis.

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“…Recently, the reuse of waste plastics for several applications has been reported [4,5]. For example, Laria et al [4] studied the mechanical properties of waste plastics composed of a mixture of waste thermoplastics for use as building components. Further, Bertelsen et al [5] reported the cracking behavior of Polymers 2021, 13, 1058 2 of 11 concrete substrates containing commercially available polypropylene fibers and recycled polyethylene (PE) fibers obtained from discarded fishing nets.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, it is crucial to develop MR processes for used plastic products to prevent environmental pollution and the depletion of virgin resources [ 3 ]. Recently, the reuse of waste plastics for several applications has been reported [ 4 , 5 ]. For example, Laria et al [ 4 ] studied the mechanical properties of waste plastics composed of a mixture of waste thermoplastics for use as building components.…”

Section: Introductionmentioning

confidence: 99%

Effects of a Twin-Screw Extruder Equipped with a Molten Resin Reservoir on the Mechanical Properties and Microstructure of Recycled Waste Plastic Polyethylene Pellet Moldings

et al. 2021

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Each year, increasing amounts of plastic waste are generated, causing environmental pollution and resource loss. Recycling is a solution, but recycled plastics often have inferior mechanical properties to virgin plastics. However, studies have shown that holding polymers in the melt state before extrusion can restore the mechanical properties; thus, we propose a twin-screw extruder with a molten resin reservoir (MSR), a cavity between the screw zone and twin-screw extruder discharge, which retains molten polymer after mixing in the twin-screw zone, thus influencing the polymer properties. Re-extruded recycled polyethylene (RPE) pellets were produced, and the tensile properties and microstructure of virgin polyethylene (PE), unextruded RPE, and re-extruded RPE moldings prepared with and without the MSR were evaluated. Crucially, the elongation at break of the MSR-extruded RPE molding was seven times higher than that of the original RPE molding, and the Young’s modulus of the MSR-extruded RPE molding was comparable to that of the virgin PE molding. Both the MSR-extruded RPE and virgin PE moldings contained similar striped lamellae. Thus, MSR re-extrusion improved the mechanical performance of recycled polymers by optimizing the microstructure. The use of MSRs will facilitate the reuse of waste plastics as value-added materials having a wide range of industrial applications.

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Mechanical and processing properties of recycled PET and LDPE-HDPE composite materials for building components

Cited by 29 publications

References 27 publications

Production and Optimization of GLP-HDPE Composite Materials Using the Robust Taguchi Technique

Production and Optimization of GLP-HDPE Composite Materials Using the Robust Taguchi Technique

On comparison of recycled LDPE and LDPE–bakelite composite based 3D printed patch antenna

Effects of a Twin-Screw Extruder Equipped with a Molten Resin Reservoir on the Mechanical Properties and Microstructure of Recycled Waste Plastic Polyethylene Pellet Moldings

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