Certain Viscoelastic Properties of Densely Crosslinked Polymers: Theoretical Calculation

Ulitin, N. V.; Дебердеев, Т. Р.; Deberdeev, R. Ya.

doi:10.1177/0307174x1304000510

Cited by 4 publications

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“…In the process of uniaxial deformation within 3-5%, the primary load is directed to the expansion of spherulites which, in terms of strength, is characterized by the tensile yield stress. Further stretching of the samples is already associated with the formation of a "neck" the strength of which is considered as ultimate tensile stress [9][10][11]. We believe that the loading of up to 5.0% LDPE will testify to the fact that the branched part of the macrochain will be redistributed mainly in the interspherolite region of HDPE, providing a partial removal of rigidity in it and thereby increasing the probability of simultaneous participation of the most of the passage chains in the process of uniaxial deformation.…”

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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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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“…Apparently, this circumstance is due to the fact that, first, the dressing of fine particles of aluminosilicates contributes to a significant reduction in the possibility of agglomeration of particles; secondly, as a result of the dehydration reaction, a covalent bond, a dressing sizealuminosilicate, a dressing size dressing size is formed. The latter circumstance contributes to the formation of a micromesh structure of a dressing size on the surface of filler particles accompanied by an improvement in the compatibility and adhesive interaction of chemically modified mineral particles with a polymer matrix [10][11][12]. An increase in heat resistance and a decrease in the MFI of composite dressing materials in general is direct evidence to the formation of mesh structure.…”

Section: Chemical Problems 2019 No 4 (17)mentioning

confidence: 99%

Technological Characteristics of Dressing Layered Aluminosilicates Process by Organosilicon Compounds

Курбанова¹

2019

Chemical Problems

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A principled technological scheme for fine-dispersed aluminosilicate dressing process with various types of organosilicon compounds, as well as technological characteristics of dressing and obtaining of modified aluminosilicates are shown. Kaolin, talc, quartz, clinoptilolite, montmorillonite, vesuvian, bentonite were used as aluminosilicates. Research into physicomechanical properties of polymer composites revealed that the loading of unmodified kaolin into low density polyethylene leads to a decrease in the elongation and ultimate tensile stress with a maximum at 10% wt. filler content. However, the loading of 10% wt. of the dressed kaolin is accompanied by a noticeable improvement in the ultimate tensile stress, flexural strength of the composite in terms of elongation maintenance at a relatively high level. For a comparative properties' evaluation it showed the possibility of producing in principle dressed aluminosilicates with a wide range of organosilicon compounds. It went to show that out of 13 names of organosilicon compounds, chlorine-containing dressing sizes have a slight effect of enhancing the strength of composite materials.

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“…exPeRIMeNtal aNd MethodS The experimental materials and the methods of their investigation were described in earlier studies [1,2]. Modelling of the topological structure of the experimental materials was carried out in a previous investigation [3].…”

Section: Introductionmentioning

confidence: 99%

“…Theoretical determination of the constant of the rubbery state was considered in earlier work [3], and therefore we will turn to the determination of the equilibrium elastic coefficient of electromagnetic susceptibility. [4], the following equation is proposed for calculating the equilibrium elastic coefficient of electromagnetic susceptibility:…”

Section: Introductionmentioning

confidence: 99%

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The Methodology for Theoretical Parametric Identification of the Mathematical Description of the Deformation Electromagnetic Anisotropy of Densely Crosslinked Polymers

Ulitin

Дебердеев

Nasibullina

et al. 2013

International Polymer Science and Technology

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Certain Viscoelastic Properties of Densely Crosslinked Polymers: Theoretical Calculation

Cited by 4 publications

References 0 publications

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

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

Technological Characteristics of Dressing Layered Aluminosilicates Process by Organosilicon Compounds

The Methodology for Theoretical Parametric Identification of the Mathematical Description of the Deformation Electromagnetic Anisotropy of Densely Crosslinked Polymers

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