Abstract:In this research, the mechanical and thermal properties of nanocomposites containing alumina nanoparticles in the highdensity polyethylene/recycled polyethylene terephthalate/maleic anhydride polyethylene (HDPE/rPET/MAPE) matrix were investigated. For this purpose, tensile, flexural, impact energy, and differential scanning calorimetry (DSC) test were done. Here, 0, 1, 3, and 5 wt% alumina nanoparticles were added to the HDPE/rPET/MAPE using a co-rotating screw extruder. Morphological studies using scanning el… Show more
“…The reduction in glass particle aggregation is due to an interaction between the surface hydroxyl groups of glass and the carbonyl groups of MAgPE attached to the polymeric matrix, which enhances the mechanical properties of the composites [ 24 , 27 , 28 ]. In comparison with the different concentrations of the reinforced waste glass powder, the size of aggregation increased with increasing glass phase content in the polymeric matrix phase, which agrees with previous studies [ 29 , 30 , 31 ]. Figure 6 SEM images of (a) raw RHDPE, (b) raw WGP, RHDPE/WGP composites without compatibilizer (c) 5 wt%, (e) 10 wt%, (g) 20 wt% and (i) 30 wt% WGP content and RHDPE/MAgPE/WGP composites with 1.5 wt.% MAgPE as a compatibilizer where (d) 5 wt%, (f) 10 wt%, (h) 20 wt% and (j) 30 wt% WGP content.…”
Several reinforcement materials are incorporated into a polymeric matrix to improve the mechanical properties and reduce the cost of the obtained composites. In this work, recycled high-density polyethylene/waste glass powder composites, compatibilized with maleic anhydride-grafted polyethylene, were prepared using a two-roll mill and compression molding techniques. Four levels of waste glass powder, 2, 10, 20 and 30% by weight, and five levels of the compatibilizer, polyethylene grafted with maleic anhydride (0.5, 1.5, 2.5, 5 and 7.5%by weight), were used. The effect of adding waste glass powder and compatibilizer concentration on the composite's mechanical properties, such as tensile strength, tensile strain, tensile modulus and thermal properties was studied. The results showed that superior mechanical properties were obtained and that the tensile strength and modulus increased with increasing waste glass powder content and compatibilizer concentration by 20 and 1.5 wt%, respectively. However, the elongation at the break decreased with the increase in both factors. The composite, which was prepared under ideal conditions, has high thermal stability and can be easily recycled and reprocessed for five cycles with high mechanical properties. This study recommends that the prepared composite, under optimum conditions, can be used as a cost-effective automobile dashboard material.
“…The reduction in glass particle aggregation is due to an interaction between the surface hydroxyl groups of glass and the carbonyl groups of MAgPE attached to the polymeric matrix, which enhances the mechanical properties of the composites [ 24 , 27 , 28 ]. In comparison with the different concentrations of the reinforced waste glass powder, the size of aggregation increased with increasing glass phase content in the polymeric matrix phase, which agrees with previous studies [ 29 , 30 , 31 ]. Figure 6 SEM images of (a) raw RHDPE, (b) raw WGP, RHDPE/WGP composites without compatibilizer (c) 5 wt%, (e) 10 wt%, (g) 20 wt% and (i) 30 wt% WGP content and RHDPE/MAgPE/WGP composites with 1.5 wt.% MAgPE as a compatibilizer where (d) 5 wt%, (f) 10 wt%, (h) 20 wt% and (j) 30 wt% WGP content.…”
Several reinforcement materials are incorporated into a polymeric matrix to improve the mechanical properties and reduce the cost of the obtained composites. In this work, recycled high-density polyethylene/waste glass powder composites, compatibilized with maleic anhydride-grafted polyethylene, were prepared using a two-roll mill and compression molding techniques. Four levels of waste glass powder, 2, 10, 20 and 30% by weight, and five levels of the compatibilizer, polyethylene grafted with maleic anhydride (0.5, 1.5, 2.5, 5 and 7.5%by weight), were used. The effect of adding waste glass powder and compatibilizer concentration on the composite's mechanical properties, such as tensile strength, tensile strain, tensile modulus and thermal properties was studied. The results showed that superior mechanical properties were obtained and that the tensile strength and modulus increased with increasing waste glass powder content and compatibilizer concentration by 20 and 1.5 wt%, respectively. However, the elongation at the break decreased with the increase in both factors. The composite, which was prepared under ideal conditions, has high thermal stability and can be easily recycled and reprocessed for five cycles with high mechanical properties. This study recommends that the prepared composite, under optimum conditions, can be used as a cost-effective automobile dashboard material.
“…The flexural results followed the flexural results of HDPE/rPET blends of Shahrajabian and Sadeghian. 9 In this study, increasing flexural strength with the addition of PA11 is slightly different compared to tensile and impact strength. The tensile and impact strength reduces at higher than 20 wt% of PA11.…”
Section: Flexural Testingmentioning
confidence: 61%
“…The improved tensile strength values were higher than rPET/HDPE blends reported by Shahrajabian and Sadeghian. 9 This was due to polar and polar heads' existence to create an interface or bond between these two polymers as depicted in Figure 3. 32 Furthermore, the increase in tensile strength of rPET was higher than 50% after the addition of 20 wt% of PA11 due to the unique morphology of PA11 in rPET matrix.…”
Section: Tensile Testingmentioning
confidence: 99%
“…The study on rPET blended with high-density polyethylene/maleic anhydride polyethylene (HDPE/rPET/MAPE) was done by Shahrajabian and Sadeghian in 2019. 9 The results were indicating that the highest tensile strength achieved was 33.5 MPa with a strain of less than 5% even with the addition of alumina nanoparticles. The tensile strength reported was not enough for various applications.…”
This work explores a novel blend of recycled polyethylene terephthalate/polyamide 11 (rPET/PA11). The blend of rPET/PA11 was introduced to enhance the mechanical properties of rPET at various ratios. The work’s main advantage was to utilize rPET in thermoplastic form for various applications. Three different ratios, i.e. 10, 20 and 30 wt.% of PA11 blend samples, were prepared using a twin-screw extruder and injection moulding machine. The mechanical properties were examined in terms of tensile, flexural and impact strength. The tensile strength of rPET was improved more than 50%, while the increase in tensile strain was observed 42.5% with the addition of 20 wt.% of PA11. The improved properties of the blend were also confirmed by the flexural strength of the blends. The flexural strength was increased from 27.9 MPa to 48 MPa with the addition of 30 wt.% PA11. The flexural strain of rPET was found to be 1.1%. However, with the addition of 10, 20 and 30 wt.% of PA11, the flexural strain was noticed as 1.7, 2.1, and 3.9% respectively. The impact strength of rPET/PA11 at 20 wt.% PA11 was upsurged from 110.53 to 147.12 J/m. Scanning electron microscopy analysis revealed a dispersed PA11 domain in a continuous rPET matrix morphology of the blends. This work practical implication would lead to utilization of rPET in automobile, packaging, and various industries.
“…In particular, high interfacial compatibility and adhesion are key factors to achieve an effective transfer of the interfacial stress under mechanical load [7,9,11,12]. This in turn allows them to avoid undesired phenomena like the debonding of the filler particles from the matrix [7,13] and delamination in the vicinity of nanoparticles [12,14,15]. One special case is that of nanocomposites with weak interfacial adhesion [16].…”
Herein, we investigated the influence of two types of nanoparticle fillers, i.e., amorphous SiO2 and crystalline ZrO2, on the structural properties of their nanocomposites with high-density polyethylene (HDPE). The composite films were prepared by melt-blending with a filler content that varied from 1% to 20% v/v. The composites were characterized by small- and wide-angle x-ray scattering (SAXS and WAXS), small-angle neutron scattering (SANS), Raman spectroscopy, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). For both fillers, the nanoaggregates were evenly distributed in the polymer matrix and their initial state in the powders determined their surface roughness and fractal character. In the case of the nano-ZrO2 filler, the lamellar thickness and crystallinity degree remain unchanged over a broad range of filler concentrations. SANS and SEM investigation showed poor interfacial adhesion and the presence of voids in the interfacial region. Temperature-programmed SANS investigations showed that at elevated temperatures, these voids become filled due to the flipping motions of polymer chains. The effect was accompanied by a partial aggregation of the filler. For nano-SiO2 filler, the lamellar thickness and the degree of crystallinity increased with increasing the filler loading. SAXS measurements show that the ordering of the lamellae is disrupted even at a filler content of only a few percent. SEM images confirmed good interfacial adhesion and integrity of the SiO2/HDPE composite. This markedly different impact of both fillers on the composite structure is discussed in terms of nanoparticle surface properties and their affinity to the HDPE matrix.
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