Graphite effect on the mechanical and fire‐retardant performance of low‐density polyethylene and ethylene‐vinyl‐acetate foam composites

González‐Morones, Pablo; Cabrera-Álvarez, Edgar N.; Sifuentes‐Nieves, Israel; Velázquez, María Guadalupe Neira; Hernández, Ernesto Hernández; Martínez, Deidré I. Sánchez; Fonseca‐Florido, Heidi A.; Covarrubias-Gordillo, Carlos Andrés; Rivera, Javier Gudiño; Gámez, José Francisco Hernández

doi:10.1002/app.50892

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…For example, foam compounds containing 30 and 40 phr of treated GTR showed the highest cell density from 1.06 × 10 11 and 1.48 × 10 11 cells/cm 3 , respectively, that is attributed to the lowest mean cell size (55–48 μm). As observed in similar systems, [ 46 ] the cell densities gradually increased and mean cell size decrease with increasing GTR content.…”

Section: Resultssupporting

confidence: 76%

Microcellular ground tire rubber/ethylene vinyl acetate compounds: Mechanical properties and structure relationships

Gámez¹,

Hernández²,

Martínez

et al. 2022

Polymer Engineering & Sci

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This study aims to investigate the effect of ground tire rubber (GTR) treated by acetone on mechanical and morphological properties of ethylene-vinyl acetate (EVA) matrix. Polymeric EVA/GTR (0, 10, 20, 30, and 40 phr) compounds were achieved through extrusion and batch foaming process. TGA and NMR analysis revealed that oils and additives were removed from the GTR after the acetone treatment. Morphological characterization showed cell sizes below 100 μm in the compounds with treated GTR, which improved the mechanical performance of EVA/GTR compounds. The results indicated that the acetonetreated GTR are a suitable raw material to obtain foam compounds useful in vibrations absorber and isolation applications.

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Section: Resultssupporting

confidence: 76%

Microcellular ground tire rubber/ethylene vinyl acetate compounds: Mechanical properties and structure relationships

Gámez¹,

Hernández²,

Martínez

et al. 2022

Polymer Engineering & Sci

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“…Since the development of polymer microcellular composite foams, several studies have been conducted, 8,9 and also studies of foaming behavior of thermoplastic polyurethane (TPU) foam shows the importance of structure properties control 10,11 . In recent years, there has been extensive research on thermoplastic elastomer foam.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of acrylonitrile butadiene styrene/thermoplastic polyurethane composite foams blown with carbon dioxide using Taguchi technique

Khaleghi,

Azdast,

Doniavi

et al. 2023

J of Applied Polymer Sci

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In this study, acrylonitrile butadiene styrene (ABS)/thermoplastic polyurethane (TPU) composite foam blown with CO2 was fabricated. Optimization was done by design of experiment (DOE) on the cellular structure using the Taguchi method. Foaming time (20, 40, and 80 s), saturation pressure (4, 5.5, and 7 MPa), and foaming temperature (80, 90, and 120°C) are the input parameters. The results obtained from the signal‐to‐noise (S/N) analysis showed that the most effective factor on the cell density (CD) was the saturation pressure and its influence rate was 48.05%, and also, the CD improved with the increase in the saturation pressure because the high saturation pressure leads to an enhancement in gas solubility and the rate of cell nucleation. Moreover, the foaming temperature and the foaming time had a noteworthy impact on the void fraction and the cell size (CS), and they should be controlled accurately. The impression rate of the foaming time on the CS was 50.86%, and also, with increase in the temperature and the time of foaming, the void fraction showed an increasing trend. The optimal values for the CD, the CS, and the void fraction were predicted to be 1.18 × 109 cells/cm3, 5.37 μm, and 0.5744%, respectively.

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“…c) The possibility of forming mixtures with other polymers. In a particular case, the addition of EVA (ethylene vinyl acetate), a copolymer of vinyl acetate and ethylene, improves some properties of PE [224]. This feature makes it possible to tailor the polarity of the PE/EVA mixture, obtaining a better compatibility for the formation of nanocomposites with layered compounds.…”

Section: I311 Polyethylene (Pe)mentioning

confidence: 99%

Nanorrellenos inorgánicos preparados a partir de LDHS para la obtención de nanocomposites de matriz polimérica. Determinación de la incidencia del método de preparación sobre sus propiedades

Gallego¹

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The present research work has focused on obtaining inorganic nanofillers from Layered Double Hydroxides (LDHs) that can be useful in the preparation of polymer matrix composites and nanocomposites with modified properties. The properties of this type of nanofillers are closely linked to their synthesis conditions; so, parameters such as pH, reaction medium, molar ratio of cations, precipitation rate, synthesis temperature and hydrothermal treatments, etc., have an important impact on the physical and surface properties of the final solids. Thus, in the present work, the synthesis of Zn,Al LDHs with molar ratios 2:1 and 3:1 has been carried out by the coprecipitation method using amines, which are softer bases than the classically used bases. Specifically, amines with different substitution degree and chain length have been used as precipitating agents using a simpler synthesis methodology than the hydrolysis of urea. The resulting solids have been characterised in terms of their morphological and structural properties and their feasibility for use as nanofillers in polymer matrix nanocomposites has been studied. Thus, nanocomposites have been prepared using polypropylene as polymeric matrix, dispersing Zn,Al LDHs synthesised under different conditions. Finally, the impact of the use of these solids as nanofillers on the thermal stability and mechanical properties of the resulting nanocomposites was studied.On the other hand, the synthesis methodology using amines as precipitating agents was extended to the preparation of Ni,Al LDHs which are of great interest as catalyst precursors in the Sabatier reaction of CO2 hydrogenation to obtain methane. The synthesis of this type of solids was carried out using dimethylamine as precipitating agent, since the formation of coordination compounds with Ni(II) was not observed and, in addition, it turned out to be the amine with which the Zn,Al LDHs offered the best properties, in terms of crystallinity degree and particle size distribution. The study of the catalytic activity of this type of solids was extended with the synthesis of catalysts promoted by cations of rare earth elements, such as Ce and La. Thus, the effectiveness of the resulting Ni-Al2O3, Ni-Ce2O3-Al2O3 and Ni-La2O3-Al2O3-Al2O3 catalysts was studied in the production of CH4, taking into account both the conversion and the selectivity towards secondary products. The catalytic test was carried out between 200 and 400 ºC, and it was observed that at 275 ºC a conversion larger than 60% was achieved, maintained up to 400 ºC, with a selectivity of 95% in methane production.

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Graphite effect on the mechanical and fire‐retardant performance of low‐density polyethylene and ethylene‐vinyl‐acetate foam composites

Cited by 7 publications

References 40 publications

Microcellular ground tire rubber/ethylene vinyl acetate compounds: Mechanical properties and structure relationships

Microcellular ground tire rubber/ethylene vinyl acetate compounds: Mechanical properties and structure relationships

Performance optimization of acrylonitrile butadiene styrene/thermoplastic polyurethane composite foams blown with carbon dioxide using Taguchi technique

Nanorrellenos inorgánicos preparados a partir de LDHS para la obtención de nanocomposites de matriz polimérica. Determinación de la incidencia del método de preparación sobre sus propiedades

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