Structure of binary mixtures of ethylene-vinylacetate copolymers

Stoyanov, O. V.; Хузаханов, Р. М.; Stoyanova, L. F.; Герасимов, В. К.; Чалых, А. Е.; Алиев, А. Д.; Vokal, M. V.

doi:10.1134/s1995421211020146

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…Total crystallinity of the uC blends decreases approximately linearly with increasing w EVA and crystallinity of each components decreases upon blending. It differs from the additivity rule of binary mixtures of different EVAs . sC blends exhibit total crystallinity lower than uC blends.…”

Section: Resultsmentioning

confidence: 71%

“…The PE/EVA blends usually form two phase morphology and demonstrate heterogeneous emulsion‐like linear viscoelasticity . Stoyanov et al determined the phase diagram of EVA blends and found that the blends with less difference in VA content show better miscibility. As a result, increasing VA content of EVA results in higher interfacial tension and coarser morphology of PE/EVA blends .…”

Section: Introductionmentioning

confidence: 99%

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Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

Zhang

Yang

Song

et al. 2014

Polymer Engineering & Sci

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High density polyethylene (HDPE)/ethylene-vinyl acetate copolymer (EVA) blends with selective crosslinking the EVA phase were prepared and the crystallization, rheological, and mechanical behaviors were studied. Selective crosslinking of EVA component could greatly improve both tensile and impact strengths of the HDPE-rich blends and influence melting enthalpy at different annealing temperature in successive self-nucleation and annealing procedure. Dynamic mechanical analysis reveals that glass transition temperatures of both the HDPE and EVA components are lowered upon blending and are raised upon crosslinking. The uncrosslinked HDPE/EVA blends are unstable in the melt and show increment in storage modulus (G 0 ) and decay in loss tangent (tand) with annealing time associated with phase coarsening. However, morphology of selectively crosslinked blends in the melt state is highly unstable, characterized by a fast migration of uncrosslinked HDPE component out of the crosslinked EVA phase to the surface resulting in a rapid decay in G 0 and an increment in tand at the early stage of annealing. POLYM. ENG. SCI., 54:2848-2858

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Section: Resultsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

Zhang

Yang

Song

et al. 2014

Polymer Engineering & Sci

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“…At present, the main methods of adhesion include adhesive, electric treatment, functional membrane, magnetization, etc. The polymer adhesive based on expanded polystyrene and ethylene-vinyl acetate is widely applied, 140 but it has an obvious disadvantage that its adhesion strength to metal is poor. The methods of improving the adhesion of flexible walls such as electric treatment and functional membrane are still in the experimental stage, 25 and large-scale field application has not been reported.…”

Section: Flexible Wall Drag Reductionmentioning

confidence: 99%

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Jing,

Guo,

Karimov

et al. 2023

Ind. Eng. Chem. Res.

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With the depletion of conventional light crude oil, heavy crude oil will occupy an increasing share of the energy structure in the 21st century. Heavy crude oil is characterized by an API gravity of 10 to 22.3 or a viscosity of 0.09 to 10 Pa·s. The flow of heavy crude oil in the pipeline is laminar in the higher viscosity range and turbulent in the lower viscosity range, and its flow resistance comes from the viscous force between the oil and the wall or the additional stress of turbulent flow. Hence, pipeline transportation of heavy crude oil is faced with a huge loss of frictional resistance, which means a reduction of the transportation efficiency. To decrease pump power consumption, improving the transportation efficiency of heavy crude oil pipelines is a key factor. In recent years, some biomimetic technologies that reduce the flow resistance of viscous oils have made new progress in improving their fluidity and have not yet been put into use in commercial pipelines. Therefore, it is important and appropriate to discuss the breakthrough achievements and progress made by researchers in the drag reduction (DR) of heavy crude oil and to summarize its advantages, disadvantages, and potential problems. This review discusses boundary layer control methods for heavy crude oil drag reduction. First, conventional DR technologies, such as polymers, surfactants, fiber suspensions, oil–water core annular flow (CAF) and oil–aqueous foam CAF, and potential DR technologies, including oleophobic surfaces, flexible walls, biomimetic microgrooves, and ferrofluid annular DR under magnetic confinement, are presented. Second, the mechanism of DR is investigated and summarized; the highlights and progress of the technology are reviewed, and new ideas to improve the existing DR technology are proposed. Finally, the challenges and prospects of DR are presented.

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Effects of the Blend Ratio and Operating Conditions (T and P) on the Thermal and Mechanical Properties of Polymer (EVA-113/Nitrile-Butadiene Rubber) Blends Prepared by Supercritical CO₂

Khairutdinov,

Khabriev,

Khuzakhanov

et al. 2024

J. Chem. Eng. Data

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The paper presents the results of an experimental study of the solubility of an ethylene-vinyl acetate copolymer (EVA-113) and nitrile-butadiene rubber (NBR-18) in organic solvents (toluene, chloroform, and dichloromethane) in the temperature range from 308 to 373 K at atmospheric pressure. The codispersion of EVA-113 and NBR-18 polymers has been performed in the pressure range from 8.0 to 25 MPa at temperatures between 313 and 333 K using the solution enhanced dispersion by supercritical fluids (SEDS) method. The crystallization kinetics and phase transformations in the polymer blends, obtained by blending in a melt and using the supercritical SEDS methods (prepared by supercritical CO 2 ), were studied and compared. The effects of the EVA-113/NBR-18 ratio and operating conditions (T and P) on the thermal (heat of fusion) and mechanical (tensile strength and relative elongation) characteristics of obtained polymer blends were studied. It has been illustrated that the use of the SEDS technique with the conventional ratio of components of the EVA-113/NBR-18 blend makes it possible to obtain thermoplastic elastomer whose properties are superior to materials obtained by blending in a melt.

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Structure of binary mixtures of ethylene-vinylacetate copolymers

Cited by 4 publications

References 1 publication

Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Effects of the Blend Ratio and Operating Conditions (T and P) on the Thermal and Mechanical Properties of Polymer (EVA-113/Nitrile-Butadiene Rubber) Blends Prepared by Supercritical CO₂

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Structure of binary mixtures of ethylene-vinylacetate copolymers

Cited by 4 publications

References 1 publication

Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Effects of the Blend Ratio and Operating Conditions (T and P) on the Thermal and Mechanical Properties of Polymer (EVA-113/Nitrile-Butadiene Rubber) Blends Prepared by Supercritical CO2

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Product

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About

Effects of the Blend Ratio and Operating Conditions (T and P) on the Thermal and Mechanical Properties of Polymer (EVA-113/Nitrile-Butadiene Rubber) Blends Prepared by Supercritical CO₂