Analysis of the mechanical properties and characterization by solid state 13C NMR of recycled EVA copolymer/silica composites

Stael, Giovanni Chaves; Rocha, Marisa Cristina Guimarães; de, Menezes Sônia Maria Cabral; d’Almeida, J.R.M.; Ruiz, Naira Machado da Silva

doi:10.1590/s1516-14392005000300008

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Among the three types of plastic, the significant differences (p< 0.05) were found only between mass loss of PS, PE and EVA, However, again no significant differences were found between PS and PE. Ethylene-vinyl acetate is one of the most challenging materials for biodegradation exhibit strong durability, high flexibility, low-temperature toughness, stress crack resistance and hot-melt adhesive waterproof properties (Stael et al, 2005). Also, it may be exciting and promising in the context of further studies.…”

Section: Resultsmentioning

confidence: 99%

Biodegradation of plastic wastes by confused flour beetle Tribolium confusum Jacquelin du Val larvae

Abdulhay¹

2020

Asian J Agric Biol

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As a consequence of increasing the production of plastics which accumulate substantial quantities of plastic wastes in the natural environment and in landfills that could persist for centuries. The ability of confused flour beetle Tribolium confusum larvae to consume and biodegrade different types of plastics were investigated. The experiment was performed by starving the larvae then exposed to three different types of plastic (polystyrene (PS), polyethylene foam (PE), and ethylene-vinyl acetate (EVA) as diet in comparison to larvae reared on the conventional diet of wheat flour. The larvae were monitored under controlled conditions then the survival rate, the mass losses for both larvae and plastics resulting from the diet on plastic as a function of time (1, 14, 21 and 30 days) were measured. The results showed that with the increase of time; the averages of larvae survival on all types of plastic were decreased compared with control. The highest larval survival rate was found in the PS diet (70%), while the least was with larvae fed on EVA (30%) after 30 days. Decreasing in the mass weight of the larvae was confirmed during the study, which indicates that plastic materials are not an efficient source of energy for larvae except their survival. The mass loss was 26.2, 31.4 and 45.8 % recorded for larvae fed on PS, PE, and EVA respectively. The study recorded that T. confusum has the ability to degradation plastic, which can reduce the pollution caused by different types of plastic wastes.

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Section: Resultsmentioning

confidence: 99%

Biodegradation of plastic wastes by confused flour beetle Tribolium confusum Jacquelin du Val larvae

Abdulhay¹

2020

Asian J Agric Biol

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“…A wide range of behavior possibilities is also shown in Figure S5a,b, ranging from "hard, brittle" to "ductile", with a yield point similar to that of a "thermoplastic polymer" when subjected to mechanical agitations (stresses) [64].…”

Section: Physicomechanical Characteristicsmentioning

confidence: 97%

Fabrication of Novel Polymer Composites from Leather Waste Fibers and Recycled Poly(Ethylene-Vinyl-Acetate) for Value-Added Products

et al. 2023

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This investigation was focused on evaluating the utilization of Leather-waste, i.e., “Leather Shavings”, to develop “Poly(ethylene-vinyl-acetate)” (EVA) based “polymer matrix composites”. Composites with the highest ratio of 1:1 were developed using a rolling-mill, which was then subjected to hot-press molding for value-added applications, notably in the “floor-covering”, “structural”, “footwear”, and “transportation domain”. The specimens were examined for evaluating the “physico-mechanical characteristics” such as, “Compressive and Tensile, strength, Abrasion-resistance, Density, tear-resistance, hardness, adhesion-strength, compression, and resilience, damping, and water absorption” as per standard advanced testing techniques. Raising the leather-fiber fraction in the composites culminated in considerable enhancement in “physico-mechanical characteristics” including “modulus”, and a decline in “tensile-strain” at “fracture-breakage”. The thermo-analytic methods, viz. TGA and DSC studies have evidenced that substantial enhancement of thermo-stability (up to 211.1–213.81 °C) has been observed in the newly developed PMCs. Additionally, the DSC study showed that solid leather fibers lose water at an endothermic transition temperature of around 100 °C, are thermo-stable at around 211 degrees centigrade, and begin to degrade at 332.56-degree centigrade for neat recycled EVA samples and begin to degrade collagen at 318.47-degree centigrade for “leather shavings/recycled EVA polymer composite samples”, respectively. Additionally, the “glass transition temperature” (Tg) of the manufactured composites was determined to be between −16 and 30 °C. Furthermore, SEM and EDAX analysis have been used to investigate the morphological characteristics of the developed composites. Micrograph outcomes have confirmed the excellent “uniformity, compatibility, stability and better-bonding” of leather-fibers within the base matrix. Additionally, the “Attenuated-total-reflection” (ATR-FTIR) was carried out to test the “physicochemical chemical-bonding”, “molecular-structure”, and “functional-groups” of the “base matrix”, and its “composites” further affirm the “recycled EVA matrix” contained additives remain within the polymeric-matrix. An “X-ray diffraction study” was also conducted to identify the “chemical-constituents” or “phases” involved throughout the “crystal-structures” of the base matrix and PMCs. Additionally, AFM analysis has also been utilized to explore the “interfacial adhesion properties” of mechanically tested specimens of fabricated polymeric composite surfaces, their “surface topography mapping”, and “phase-imaging analysis” of polymer composites that have leather-shavings fibers.

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Comonomer Effect on the Thermal, Morphological and Mechanical Properties of Poly(ethylene-co-octene)/Poly(ethylene-co-vinyl acetate) Blends

Mamun

Mahmood

2020

Polym. Sci. Ser. A

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Analysis of the mechanical properties and characterization by solid state 13C NMR of recycled EVA copolymer/silica composites

Cited by 4 publications

References 13 publications

Biodegradation of plastic wastes by confused flour beetle Tribolium confusum Jacquelin du Val larvae

Biodegradation of plastic wastes by confused flour beetle Tribolium confusum Jacquelin du Val larvae

Fabrication of Novel Polymer Composites from Leather Waste Fibers and Recycled Poly(Ethylene-Vinyl-Acetate) for Value-Added Products

Comonomer Effect on the Thermal, Morphological and Mechanical Properties of Poly(ethylene-co-octene)/Poly(ethylene-co-vinyl acetate) Blends

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