Particle Filled Polyethylene Composites Used in the Technology of Rotational Moulding

Bútora, Peter; Náplava, Antonín; Ridzoň, Martin; Bílik, Jozef; Tittel, V.

doi:10.2478/v10186-011-0051-5

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…The initial VST for pure PE (117 • C) was the highest, while the heat resistance for the increasing WB content was lower, with the addition of 20% WB it was around 111 • C. Such a scale of changes can be considered small, but interestingly the addition of a filler causes thermal resistance folds. Previous research on the rotational molding technique partly overlaps with the obtained VST measurement results, where the addition of the filler did not significantly affect the heat resistance of the composite [55,56], or even worsened it [57]. Usually, the occurrence of significant material porosity is indicated as the main reason for the deterioration of materials properties of rotomolded composites [58].…”

Section: Thermomechanical Behaviormentioning

confidence: 88%

Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

et al. 2020

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Application of lignocellulosic fillers in the manufacturing of wood polymer composites (WPCs) is a very popular trend of research, however it is still rarely observed in the case of rotational molding. The present study aimed to analyze the impact of wheat bran content (from 2.5 wt.% to 20 wt.%) on the performance of rotationally-molded composites based on a linear low-density polyethylene (LLDPE) matrix. Microscopic structure (scanning electron microscopy), as well as physico-mechanical (density, porosity, tensile performance, hardness, rebound resilience, dynamic mechanical analysis), rheological (oscillatory rheometry) and thermo-mechanical (Vicat softening temperature) properties of composites were investigated. Incorporation of 2.5 wt.% and 5 wt.% of wheat bran did not cause significant deterioration of the mechanical performance of the material, despite the presence of ‘pin-holes’ at the surface. Values of tensile strength and rebound resilience were maintained at a very similar level, while hardness was slightly decreased, which was associated with the porosity of the structure. Higher loadings resulted in the deterioration of mechanical performance, which was also expressed by the noticeable rise of the adhesion factor. For lower loadings of filler did not affect the rheological properties. However, composites with 10wt.% and 20 wt.% also showed behavior suitable for rotational molding. The presented results indicate that the manufacturing of thin-walled products based on wood polymer composites via rotational molding should be considered a very interesting direction of research.

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Section: Thermomechanical Behaviormentioning

confidence: 88%

Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

et al. 2020

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“…A decrease in MFR with increasing the filler content is associated with increased viscosity of the filled material, as well as with an increase in its density (Figure 12) caused by increasing the amount of quartz flour particles in the matrix of linear low-density polyethylene. This phenomenon is well-known and often described in the literature [ 35 , 36 ]. A probable cause of the reduction in MFR is the ability of filler particles to agglomerate, which results in a distorted flow of the polymer material in the platometer die flow channels.…”

Section: Resultsmentioning

confidence: 93%

Study on the Properties and Structure of Rotationally Moulded Linear Low-Density Polyethylene Filled with Quartz Flour

2022

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The objective of this study is to determine selected properties of thin-walled rotationally moulded composite parts. Linear low-density polyethylene (LLDPE) filled with quartz flour (QF, 5–35 wt.%) was tested. High-density polyethylene functionalized with maleic anhydride (HDPE-g-MA) was used as a compatibility agent. Polymer samples were prepared with and without the compatibility agent (2 wt.% in relation to the QF content). The study investigated the effect of QF content and HDPE-g-MA on the properties of rotationally moulded parts, including their melt flow rate (MFR), thermal properties (DSC and TGA), thermomechanical properties (VST), mechanical and physical properties, microstructure, and geometry. Results showed that the properties of LLDPE/QF with HDPE-g-MA were significantly higher than those of LLDPE/QF without HDPE-g-MA. It was also found that the compatibility agent improved the composite material’s thermal stability. This improvement was attributed to interactions occurring between the composite material components due to the use of the compatibility agent. In addition to that, microscopic examination demonstrated that the use of HDPE-g-MA improved miscibility of the composite material components. The composite samples containing HDPE-g-MA had better surface geometry.

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“…Right choice of input parameters is very important and with influence on the mechanical characteristics and the final product [1,2,3,4,5,8]. For example Butora P., et al concluded it is necessary to choose optimal parameters of the polymer filler and the size of the particles, their dispersion and density [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretic Research Regarding Extrusion Optimization for Reinforced Polyamide (PA 6.6 – 10 % GF)

Popescu

Hancu

Bere

et al. 2015

AMM

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This paper presents the possibility of extrusion optimization using Design Expert software for statistical analyze and also for the recommendation of some manufacturing data. Mechanical characteristics are determined on samples from extruded tubes. On these samples, ANOVA (Analysis of variance) software is used, in order to determine the optimal values of the temperatures in different zones. The material is polyamide 6.6, reinforced with 10 % glass fiber (PA 6.6 – 10 % GF). The authors want to present the influence of the reinforcement degree upon some mechanical characteristics of the products made by extrusion. Considering the homogeneity of the polymeric melt the product’s quality will be analyzed. During the extrusion process a series of parameters (extrusion speed, the pellets feed, processing temperature etc.) are involved and they must be taken into account to achieve calibrated and qualitative products.

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Particle Filled Polyethylene Composites Used in the Technology of Rotational Moulding

Cited by 6 publications

References 1 publication

Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

Study on the Properties and Structure of Rotationally Moulded Linear Low-Density Polyethylene Filled with Quartz Flour

Experimental and Theoretic Research Regarding Extrusion Optimization for Reinforced Polyamide (PA 6.6 – 10 % GF)

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