Crystallization Kinetics of Composite Materials Based on Polyethylene Mixture with High and Low Density

Kakhramanov, N. T.; Мустафаева, Ф А; Arzumanova, N. B.; Гулиев, А. Д.

doi:10.1134/s2075113320010177

Cited by 8 publications

(9 citation statements)

References 7 publications

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“…More disperse crystalline structure are usually formed in the near-wall region. Introduction of mineral nanoparticles to PEMA promotes the formation of heterogeneous nucleating centers in the melt of nanocomposite, which generally result in the increase in the rate of their crystallization simultaneously with homogeneous centers [16]. Simultaneous formation of growing crystal formations on mixed centers promotes the formation of fine-spherolite supramolecular structures, which are favorable for the increase in strength characteristics.…”

Section: Resultsmentioning

confidence: 99%

Influence of Molding Condition on the Properties of Dressed and Functionalized Nanocomposites Based on Low Density Polyethylene

Курбанова

Kakhramanov

Osipchik

et al. 2021

Inorg. Mater. Appl. Res.

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The results of a study of the effect of injection molding on the physicomechanical and technological properties of nanocomposites based on low density polyethylene functionalized with maleic anhydride and talc dressed with gg-aminopropyltriethoxysilane are presented. As the object of study, nanocomposites with 5.0 and 30 wt % of dressed talc were used. Properties such as breaking stress, elongation at break, flexural strength, and volumetric shrinkage were investigated. It was found that the introduction of dressed talc in the composition of chemically modified low density polyethylene contributed to some increase in the breaking stress and the flexural modulus of the nanocomposite. Experimental studies were carried out in a wide range of temperatures of the material cylinder and casting pressure. It was found that relatively high physical and mechanical properties were achieved in samples obtained at higher temperatures in the zones of the material cylinder. The casting pressure ranged from 50 to 150 MPa. It was found that relatively high physicomechanical and technological properties for nanocomposites with 5.0 and 30 wt % talc content were achieved at a temperature of the material cylinder in the zones of 110-130-160-180°C and a casting pressure of 150 MPa. A significant reduction in volumetric shrinkage is achieved in samples with 30 wt % talc content. The influence of mold temperature and holding time under pressure on the change in the properties of nanocomposites is considered. It is shown that the optimal mode in the cooling mold for samples with 5.0 wt % talc content is 50°C and the exposure time under pressure of 20 s, and for a nanocomposite with 30 wt % talc content, 50°C and holding time 10 s. The influence of the location of the gate device relative to the surface of the sample on the change in the properties of composite materials is studied. The scientific substantiation of the discovered patterns in changing the properties of nanocomposites is given.

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Section: Resultsmentioning

confidence: 99%

Influence of Molding Condition on the Properties of Dressed and Functionalized Nanocomposites Based on Low Density Polyethylene

Курбанова

Kakhramanov

Osipchik

et al. 2021

Inorg. Mater. Appl. Res.

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“…In this regard, the use of polyethylene mixtures makes it possible to obtain a whole range of polymeric materials and related products with various combinations of density and degree of crystallinity. This method is distinguished by the simplicity of the technological solution and can be implemented in nearly all large and small enterprises on plastic processing [1][2][3]8].…”

Section: Resultsmentioning

confidence: 99%

Physicomechanical Properties of High and Low Density Polyethylene Mixtures and Modified Compositions on Their Basis

Mustafayeva¹,

Kakhramanov²,

Ismayilov³

et al. 2020

Chemical Problems

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The paper considers the influence of the ratio of polymer components-high density polyethylene and low density polyethylene, on the main physicomechanical properties. The properties of polymer mixtures such as tensile yield stress, ultimate tensile stress and elongation at break were studied. It revealed that as the content of low density polyethylene in the polymer mixture increases, two small maxima appear on curves. These maxima correspond to 5.0 and 50 wt. % of the content of low density polyethylene in the mixture. The loading of 1.0 wt. % of a structurant-titanium dioxide into the composition of polymer mixtures leads to noticeable increase in their strength indicators and elongation at break at almost all ratios of polymer components. The effect of the crosslinking agent, sulfur, on the basic physicomechanical and thermophysical properties of composite materials was examined. It found that as the sulfur content rose from 1.0 to 5.0 wt. % in the polymer mixture, a regular increase in the tensile yield strength, elongation at break, and heat resistance of the samples is observed. Along with this, a slight decrease in the melt flow rate of polymer compositions with an increase in the concentration of the curing agent was noted. The theoretical substantiation of processes occurring in polymer mixtures in the process of exposure to titanium dioxide and sulfur was presented.

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“…The choice of the 50/50 ratio of the LDPE (50) /HDPE (50) polymer mixture was due to the fact that when equal amount of mixture components are used the phase inversion and the best technological compatibility and miscibility are achieved [8]. Мустафаева Ф.А., Кахраманов Н.Т., Арзуманова Н.Б.…”

Section: Methodsmentioning

confidence: 99%

“…Blending different types of polyethylenes can provide the desired set of properties with improved processability. The use of polyethylene mixtures makes it possible to obtain a whole range of polymeric materials and products based on them with various combinations of density and crystallinity degree [8]. Since in the field of polymer processing it is necessary to properly control the flow and stability of polymer melts, it was interesting to study the influence of a structure-forming agent on the rheological properties of a melt of a polymer mixture based on low and high density polyethylene.…”

Section: Introductionmentioning

confidence: 99%

Influence of structure-forming agent on rheological properties of polymer mixture based on low and high density polyethylene

Mustafayeva,

Kakhramanov,

Arzumanova

et al. 2024

Izvestiâ vuzov. Prikladnaâ himiâ i biotehnologiâ

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The paper considers the effect of a structure-forming agent (titanium dioxide) on the rheological characteristics of a polymer mixture based on low and high density polyethylene, taken in a 50/50 ratio. The titanium dioxide concentration was 1 wt%. The rheological behavior of melts of polymer composites was studied using a CEAST MF50 capillary rheometer (Instron, Italy) at temperatures of 190, 210, 230, 250 °С and loads of 3.8, 5.0, 10.0, 12.5, and 21.6 kg. The effect of temperature and shear stress on the regularity of changes in effective viscosity and shear rate has been established. According to the Arrhenius – Frenkel – Eyring model, the activation energy of the viscous flow of composites is determined. The “apparent” activation energy of the viscous flow varies within 16.04–33.10 kJ/mol for the initial polyethylene mixture and in the range of 6.96–33.10 kJ/mol for composites modified with a structurant based on a mixture of low and high density polyethylene. A universal temperature-invariant characteristic of the viscosity properties of polymeric materials has been constructed, which makes it possible, by extrapolating this dependence to the region of high shear rates, to predict the technological mode of their processing by injection molding and extrusion.

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Crystallization Kinetics of Composite Materials Based on Polyethylene Mixture with High and Low Density

Cited by 8 publications

References 7 publications

Influence of Molding Condition on the Properties of Dressed and Functionalized Nanocomposites Based on Low Density Polyethylene

Influence of Molding Condition on the Properties of Dressed and Functionalized Nanocomposites Based on Low Density Polyethylene

Physicomechanical Properties of High and Low Density Polyethylene Mixtures and Modified Compositions on Their Basis

Influence of structure-forming agent on rheological properties of polymer mixture based on low and high density polyethylene

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