Mechanical and thermal properties of polyethylene/carbon nanofiber composites produced by rotational molding

Zepeda‐Rodríguez, Zenen; Arellano‐Martínez, Martin R.; Cruz‐Barba, Emilio; Zamudio‐Ojeda, Adalberto; Rodrigue, Denis; Vázquez‐Lepe, Milton; González‐Núñez, Rubén

doi:10.1002/pc.25448

Cited by 14 publications

(13 citation statements)

References 45 publications

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“…The MFI declared by the producer of HDPE is 7.2 g/10 min; however, the measured MFI is slightly higher than the upper bound of the range and decreases with the addition of the filler ( Table 3 ). Usually, the addition of reinforcement into the polymer matrix increases melt viscosity, which indirectly lowers the melt flow index [ 42 ]. The observed changes in the MFI are negligible; therefore, it can be stated that the addition of up to 10 wt% of the EV, should not affect the processing properties of these composites through the rotational molding technology.…”

Section: Resultsmentioning

confidence: 99%

The Relationship between a Rotational Molding Processing Procedure and the Structure and Properties of Biobased Polyethylene Composites Filled with Expanded Vermiculite

et al. 2022

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Rotational molding is a technology in which polymeric thin-walled products can be made. The newest descriptions of this technology concern the possibility of obtaining polymer composite materials. There are two main methods of incorporating fillers into a polymer matrix. Dry blending is based on mixing fillers with polymer powders before rotational molding by hand or using automatic mixers. In the melt compounding method, fillers are mixed with the polymer in the preliminary step by melt processing and then grinding or pulverization to obtain polymer powders for rotational molding. This work aimed to investigate the impact of the processing procedure on the structure and properties of biobased composites with expanded vermiculite. Produced rotomolded parts were examined using mechanical tests to assess changes in tensile, flexural, and impact properties. The most significant difference in mechanical properties was noted for samples with 10 wt% expanded vermiculite (EV). The elasticity modulus increases by almost 2 fold when the sample is prepared in a two-step process, the tensile strength is 4-fold higher, the flexural modulus is 3-fold higher, and the flexural strength is 5-fold higher. We also investigated thermomechanical properties in DMA measurement. The void volume content was also measured to control the quality of obtained parts. The porosity of dry blended samples containing more than 2 wt% EV is almost 2-fold higher. Other methods to control quality and structure were optical and scanning electron microscopy used for rotomolded parts and polymer powders. The investigations of rotomolded parts were supplemented with a complete description of used materials, including the particle size distributions of polymer powders and filler. Analysis of the thermal properties and chemical structure was also performed despite all the mechanical tests. The emerging conclusions from the research clearly show that the two-step process allows for achieving a more beneficial mechanical performance of the composites made of the biobased polymer in rotational molding technology.

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Section: Resultsmentioning

confidence: 99%

The Relationship between a Rotational Molding Processing Procedure and the Structure and Properties of Biobased Polyethylene Composites Filled with Expanded Vermiculite

et al. 2022

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“…Following this, many studies investigating the possibility of producing composites via rotational molding were conducted. Different natural fibers such as flax [10], banana and abaca [11], agave [12][13][14], coir [12,14,15], pine [12], maple [16,17], wood [18,19], buckwheat husk [20], glass fibers [21,22], carbon fibers [22], glass particles [23,24], other synthetic particles [24,25] and nanoparticles [26][27][28][29][30] as reinforcements with different grades of polyethylene [9,11,12,14,15,17,21,22,31], polyamide [26], polylactic acid [13,20], and polypropylene [18] as matrix were used in the studies.…”

Section: Introductionmentioning

confidence: 99%

“…Trejbal et al reported that oxygen plasma treatment of glass fibers increased their wettability by 25% when compared with untreated glass fibers [35]. Plasma treatment of wood fibers improved the tensile strength and modulus of polypropylene composites prepared using the treated fibers when compared with composites prepared using untreated fibers [30]. Similarly, plasma-treated coir fibers/starch composites [36] and plasma-treated flax fibers/LDPE composites [37] had better mechanical properties when compared with composites prepared using untreated fibers.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Plasma Treatment of Polyethylene Powder and Glass Fibers on Selected Properties of Their Composites Prepared via Rotational Molding

et al. 2022

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In this article, the effect of plasma treatment of polyethylene powder and glass fibers on the adhesion between polyethylene and glass fibers in composites prepared by rotational molding was studied. In contrast to other processing techniques, such as injection molding, the rotational molding process operates at atmospheric pressure, and no pressure is added to ensure mechanical interlocking. This makes reinforcing the rotomolded product very difficult. Therefore, the formation of chemical bonds is necessary for strong adhesion. Different combinations of untreated polyethylene (UT.PE), plasma-treated polyethylene (PT.PE), untreated and plasma-treated glass fibers were manually mixed and processed by rotational molding. The resulting composites were cut and tested to demonstrate the effect of the treatment on the adhesion between the composite components and on the mechanical properties of the final composites. The results showed that the treatment of both powder and fiber improved the adhesion between the matrix and fibers, thus improving the mechanical properties of the resulting composites compared to those of pure polyethylene samples and composites prepared using untreated components. The tensile strength, tensile modulus, and flexural modulus of the composites prepared using 10-min treated powder with 20 wt% of 40-min treated fibers improved by 20%, 82%, and 98%, respectively, compared to the pure polyethylene samples.

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“…Their results showed that the mechanical properties can be significantly modified with very low CNF content (1 wt% or less), especially the surface treated one. [10] The necessity of the hour is for research into developing an antimicrobial plastic that can substitute certain infection-prone uses of tidy plastic. This is especially accurate whenever the plastic will be used in microbiologically sensitive locations, such as medical institutions, manufacturing facilities, or experimental settings where biological contamination has to be avoided.…”

Section: Introductionmentioning

confidence: 99%

“…Their results showed that the mechanical properties can be significantly modified with very low CNF content (1 wt% or less), especially the surface treated one. [ 10 ]…”

Section: Introductionmentioning

confidence: 99%

Evaluation of mechanical, optical, and antibacterial properties of metal‐oxide dispersed HDPE nanocomposites processed by rotational molding

Ghanbarpour

Moslemi

2022

Polymer Composites

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To investigate the impact of zinc oxide/titanium dioxide nanoparticles on the characteristics of high‐density polyethylene, researchers used the rotational molding technique to produce polymeric nanocomposites. The nanocomposites' morphological, mechanical, optical, as well as biological characteristics, were studied using a range of characterizations. SEM analysis revealed a uniform morphology of ZnO and TiO2 nanoparticles in the polymer matrix, with 80–120 nanometers middle particle dimensions. The existence of ZnO with hexagonal wurtzite form as well as TiO2 with rutile phase was verified by XRD and XRF. Corresponded to the pure polymer, the HDPE‐ZnO/TiO2 nanocomposites' flexural modulus and tensile strength increased, but elongation at break reduced, according to mechanical characterization. UV–visible spectroscopy revealed that the HDPE‐ ZnO/TiO2 nanocomposites showed UV light absorption at wavelengths ranging from 250 to 390 nm. According to antibacterial tests and contact angle measurements, adding metal oxide NPs to HDPE improved hydrophilicity and antibacterial activity.

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Mechanical and thermal properties of polyethylene/carbon nanofiber composites produced by rotational molding

Cited by 14 publications

References 45 publications

The Relationship between a Rotational Molding Processing Procedure and the Structure and Properties of Biobased Polyethylene Composites Filled with Expanded Vermiculite

The Relationship between a Rotational Molding Processing Procedure and the Structure and Properties of Biobased Polyethylene Composites Filled with Expanded Vermiculite

The Effect of Plasma Treatment of Polyethylene Powder and Glass Fibers on Selected Properties of Their Composites Prepared via Rotational Molding

Evaluation of mechanical, optical, and antibacterial properties of metal‐oxide dispersed HDPE nanocomposites processed by rotational molding

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