Properties and Morphology of Polypropylene/Big Bags Compounds

Ferreira, Eduardo da Silva Barbosa; Pereira, Caio Henrique do Ó; Araújo, Edcleide Maria; Bezerra, Elieber Barros; Siqueira, Danilo Diniz; Wellen, Renate Maria Ramos

doi:10.1590/1980-5373-mr-2018-0850

Cited by 5 publications

(3 citation statements)

References 21 publications

(23 reference statements)

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“…An exception is valid for PPcr, in which the thermal properties remained unchanged. Before thermo-oxidation aging, PPc presented Tm 165 °C, as is usual for PP and attributed to the melting of the crystalline α phase (Ferreira et al, 2019), while PPcr and PPc/PPcr blends presented slightly higher Tm; as PPcr is a lower-viscosity polymer (please see MFI data in Figure 8), it is believed crystallization and ordering phenomena were improved due to easier macromolecular chain mobility being translated in higher perfection crystals and Tm [63,64].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 78%

From Waste to Potential Reuse: Mixtures of Polypropylene/Recycled Copolymer Polypropylene from Industrial Containers: Seeking Sustainable Materials

et al. 2022

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This work investigated the effect of thermo-oxidation aging in blends of copolymer polypropylene (PPc)/recycled copolymer polypropylene (PPcr) from industrial container waste, coded as PPc/PPcr blends. All compounds were melt extruded, and the injection molded specimens were characterized by mechanical properties (tensile and impact), Fourier-transform infrared spectroscopy (FTIR), melt flow index (MFI), contact angle, heat deflection temperature (HDT), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). FTIR spectra presented bands related to the hydroperoxides and carbonyl groups, as resulted from thermo-oxidation aging. The contact angle decreased upon a thermo-oxidation aging influence, corroborating the FTIR spectra. PPcr presented higher MFI as a consequence of reprocessing. Impact strength and elongation at break were quite sensible to the thermo-oxidation aging influence and were progressively reduced upon increased time, whereas tensile strength, elastic modulus, and HDT only slightly changed. SEM images of PPc presented a higher quantity of pulled-out particles, resulted from a lower interaction between phases, i.e., polypropylene and ethylene/propylene. From the impact strength and toughness data, proper dissipation energy mechanisms were found in PPc/PPcr blends. Summing up, using PPcr contributed to minimize properties’ losses, which may be related to the stabilizer agents, whereas the described results presented great potential for the PP market, while contributing to the sustainable environment.

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Section: Differential Scanning Calorimetrymentioning

confidence: 78%

From Waste to Potential Reuse: Mixtures of Polypropylene/Recycled Copolymer Polypropylene from Industrial Containers: Seeking Sustainable Materials

et al. 2022

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“…PP is a semicrystalline polymer known commercially for presenting an excellent balance of properties, including high chemical resistance, reasonable ductility, good stiffness, low density, and excellent processability [5,6]. Therefore, developing polymeric mixtures with recycled PP is increasingly explored, because it allows the reduction of waste deposited in the environment and contributes to the production of materials with good properties [7].…”

Section: Introductionmentioning

confidence: 99%

From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as a Polystyrene Impact Modifier

et al. 2020

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The practice of recycling over the years has been increasingly encouraged, with the aim being the manufacturing of materials that contribute to sustainable development. In light of this, the present work evaluated the potential of mixtures of polystyrene (PS)/recycled copolymer polypropylene (PPr), using styrene-(ethylene/butylene)-styrene (SEBS) as a compatibilizing agent. Initially, the mixtures were prepared in a co-rotational twin-screw extruder, and, afterwards, the extruded granules were molded by injection. The properties of torque rheometry, impact strength, tensile properties, differential scanning calorimetry (DSC), heat deflection temperature (HDT), and scanning electron microscopy (SEM) were evaluated. The formulation PS/PPr/SEBS (70/20/10 %wt.) demonstrated an increase in viscosity, corroborating with an increase of 123% and 227% in the elongation at break and impact strength, respectively, compared to neat PS. Though the elastic modulus and tensile strength suffered losses, the reduction was not drastic. Furthermore, the addition of a semi-crystalline recycled material in the amorphous matrix (PS) contributed to an increase in thermomechanical strength, as seen in the HDT. The morphology revealed that SEBS is effective in making PS/PPr mixtures compatible because the dispersed phase is well adhered to the PS matrix and promotes greater morphological stability. Thus, it is possible to add value to discarded material and reduce the costs of the final product, which can reduce pollution.

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“…The recycling and reuse of most commodity polymers have been extensively studied over the years (Satya et al, 2020;Luna et al, 2019a;Luna et al, 2015;Luna et al, 2014;Araújo and Morales, 2018;Ferreira et al, 2019a;Aishah et al, 2020), indicating the feasibility of developing blends between virgin and recycled polymers, in controlled quantities. Meanwhile, blends of poly (lactic acid) and PLA waste from 3D filaments have practically not been investigated in polymer literature, thus leaving a gap to be investigated on the reuse of PLA from additive manufacturing.…”

Section: Introductionmentioning

confidence: 99%

From disposal to sustainable development: technological potential of poly(lactic acid) (PLA) blends with 3D filament waste

Marinho

Luna

Araújo

et al. 2020

RSD

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Additive manufacturing is growing rapidly in the automotive, medical, and aerospace industries as an option for the manufacturing of products. However, there is a continuous growth in the amount of waste generated by 3D filaments, thus, the reuse practice becomes important, since it brings environmental and economic gains. The present research evaluated the mechanical, thermal, thermomechanical and rheological properties of PLA/PLAr blends containing post-consumption 3D filament. The blends were prepared in a co-rotational twin screw extruder and, subsequently, the extruded granules were injection molded. As the PLAr content in the blends (PLA/PLAr) increased, there was a reduction in viscosity, indicating an improvement in manufacturability. The PLA/PLAr blend (75/25 % wt.) increased the degree of crystallinity compared to neat PLA, indicating that PLAr acted as a nucleating agent. As a consequence, the PLA/PLAr blend (75/25 % wt.) showed performance comparable to neat PLA in thermal stability, elastic modulus, tensile strength, Shore D hardness, impact strength, heat deflection temperature (HDT) and Vicat softening temperature. The reuse of post-consumption 3D filament PLA is feasible for the development of materials with good properties. In addition, value is added to the post-consumption material and there is a contribution to sustainable development.

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Properties and Morphology of Polypropylene/Big Bags Compounds

Cited by 5 publications

References 21 publications

From Waste to Potential Reuse: Mixtures of Polypropylene/Recycled Copolymer Polypropylene from Industrial Containers: Seeking Sustainable Materials

From Waste to Potential Reuse: Mixtures of Polypropylene/Recycled Copolymer Polypropylene from Industrial Containers: Seeking Sustainable Materials

From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as a Polystyrene Impact Modifier

From disposal to sustainable development: technological potential of poly(lactic acid) (PLA) blends with 3D filament waste

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