Vibration-and noise-absorbing polymer composites used in manufacturing

Zharin, D. E.; Yurasov, S. Yu.; Gumerov, Marat Irekovich; Shafigullin, L. N.

doi:10.3103/s1068798x1002022x

Cited by 8 publications

(3 citation statements)

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“…Today the large segment of heat and sound insulation material market is based on polyurethane (PU) foams which are popular due to the possibility to use the highly-efficient foaming methods, including foaming -in-place [5,6]. As known [5][6][7][8][9], it uses liquid ingredients with different viscosity, which when mixed in specific proportions give the catalyzed reaction of urethane and urea formation, accompanied by foaming due to the evolution of low molecular weight gas products. It should be noted, however, that the major shortcoming of PU foams is their high flammability.…”

Section: Introductionmentioning

confidence: 99%

Studies of the Influence of Graphite on the Physical Mechanical and Thermal Properties of Polyurethane Foams for Construction Applications

Shafigullin

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Shafigullina

2021

KEM

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The paper shows the applicability of expandable graphite METOPAC EG 350-50 (80) in a rigid PU foam system as a substance that reduces the flammability (flame retardant) and improves the usability. The studies of the physical mechanical and thermal properties of PU foam with a higher graphite content revealed a higher normal sound absorption coefficient; insignificant influence on the thermal conductivity; a higher decomposition onset temperature; more difficult ignition. PU foam sample with a ratio of 15 graphite weight fractions to 100 polyol weight fractions has the highest physical mechanical and thermal properties, and, as compared to the starting PU foam, it features an increase in normal sound absorption coefficient by an average of 3 times; a decrease in the thermal conductivity by 8 %; an increase in the decomposition onset temperature by 6.7 °С. Therefore, the modification of PU foam with expandable graphite makes it possible not only to develop hardly combustible polyurethanes but also to improve its physical mechanical and thermal properties.

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Section: Introductionmentioning

confidence: 99%

Studies of the Influence of Graphite on the Physical Mechanical and Thermal Properties of Polyurethane Foams for Construction Applications

Shafigullin

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Shafigullina

2021

KEM

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“…Glass-filled polymeric foams make it possible to manufacture large-sized elements with a multi-layer structure, composed of various combinations of solid and porous foam material and short glass fibers, formeeting various functional and aesthetic requirements in different fields of application. Glassfilled polymeric foams are widely used for the production of carcasses, heat-insulating screens in the automotive industry [3,[9][10][11]. Polymeric foams also find wide application in the production of aircraft.…”

Section: Introductionmentioning

confidence: 99%

Thermal Studies of Polymeric Foams Used in Engineering

Романова¹

2018

Helix

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Polymeric foams, used in the production of aircraft, are consideredin the article. Thermogravimetric analysis and differential scanning calorimetry were used to conduct thermal studies of rigid polyimide foam materials. It was shown, that the process of thermal destruction of these foams hadthree stages of different intensity: the destruction of rigid segment with the formation of initial components and the emission of volatile elements; the activation of thermo-oxidative processes; the decomposition, accompanied by considerable heatrelease. Infrared spectroscopy was used to estimate the influence of the content of volatile components on the glass transition temperature of rigid polyimide foams. It was found, that the presence of volatile substances led to a decrease in the glass transition temperature of the foam materials.

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“…The noise sources in a vehicle cabin are following: running engine that causes vibration (sound pressure reaches 101 dB); working gearbox (sound pressure up to 104 dB); inefficient design of component and system parts, or assembly defects, poor vehicle packaging; tyre road noise [1][2][3][4][5] .…”

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confidence: 99%