Cumulative damage of hollow glass microsphere weight fraction in polyurethane foam in response to cryogenic temperatures and repeated impact loading

Bae, Jin Ho; Hwang, Byeong-Kwan; Kim, Jeong‐Hyeon; Kim, Seul-Kee; Lee, Jae-Myung

doi:10.1016/j.cryogenics.2020.103057

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…Bae et al investigated the effects of HGM filling in epoxy resin and polyurethane foam composite materials under low-level shaking impact energies (only 3 J). 27 Nevertheless, under higher impact energies, the internal structure of materials is inevitably altered, and research on the impact of filling HGM in porous soft materials remains scarce.…”

Section: Introductionmentioning

confidence: 99%

Preparation and energy absorption of flexible polyurethane foam with hollow glass microsphere

Shu,

Xi,

Wang

et al. 2024

Journal of Cellular Plastics

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This paper presents the preparation of a partially open-cell and partially closed-cell flexible polyurethane foam material (flex-PUF), which exhibits improved cushioning performance compared to conventional protective materials. Hollow Glass Microspheres (HGM) were used as a filling material to enhance the compressibility of the material. In order to investigate the effects of HGM on the multi-impact protection and vibration damping performance of flex-PUF with different thicknesses, flex-PUF samples filled with varying volume fractions of HGM were subjected to multi-impact testing and dynamic viscoelasticity experiments. The destructive mechanism of HGM under impact was observed using scanning electron microscopy (SEM). The experimental results revealed that, under the same impact energy conditions, filling flex-PUF with HGM reduced the maximum impact displacement while enhancing energy absorption, although at the expense of cushioning performance. As the number of impact increases, the stiffness of flex-PUF decreased. In the vibration experiments, as the frequency increased, the proportion of flex-PUF’s viscous damping energy dissipation decreases.

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Section: Introductionmentioning

confidence: 99%

Preparation and energy absorption of flexible polyurethane foam with hollow glass microsphere

Shu,

Xi,

Wang

et al. 2024

Journal of Cellular Plastics

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“…Hollow glass microsphere is a kind of new inorganic powder material developed in recent years, with excellent performance such as small particle size, high compressive strength, rich source, inexpensive, insulation, thermal insulation, and insulation, have a good application on paint, insulation materials, fire-fighting materials, glass ceramic and polymer materials [6][7][8][9] . HGB can improve the thermal insulation of the coating and reduce the surface and internal temperature of the composite coated with the coating; it can be used as a reinforcing modifier and stabilizer to improve the strength and thermal stability of polyimide foaming materials; and as a modifier to improve the mechanical properties of thermoplastic resin composites [7][8][9][10][11] . Because of the low density of the hollow sphere structure, HGB can be directly added to the polymer to reduce the density of the composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of hollow glass microsphere on flame retardant and mechanical properties of polyurethane foams

Li,

Wang,

Chen

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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By adding a glass microsphere that was modified by different methods to a polyurethane foam system, a hollow glass microsphere/polyurethane foam composite was prepared. The effect of the modified method, the additive amount of glass microsphere on the burning and mechanical properties of rigid polyurethane foam was studied. The results show that after adding a glass microsphere, the mechanical properties of rigid polyurethane foam were reduced, and the combustion performance was improved. Comparing adding a hollow glass microsphere that modified by adding microcapsules to the coupling agent, the mechanical properties of polyurethane composite foam were declined slowly, and the inflame-retarding effect was also significantly improved. When the additive amount of hollow glass microsphere modified by microcapsules was 6%, the compressive strength and compressive modulus of polyurethane foam were decreased by 13.0% and 4.6% respectively. When the amount of hollow glass microsphere modified by microcapsules was 8%, the level combustion weightlessness speed of polyurethane declined from 0.024g/s to 0.015g/s.

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“…The shock load jump of LNG tankers is an important problem that can cause damage to the LNG cargo containment system, which results in cryogenic leakage from the ship's hull. An insulation system based on epoxy resin is an acceptable material that can withstand repetitive shock loads [31]. In [32], an efficient method for obtaining epoxy nanocomposites with excellent mechanical properties at cryogenic temperatures is proposed, significantly increasing the cryogenic tensile strength and impact toughness of epoxy nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Fire Protection of Steel Structures with Epoxy Coatings under Cryogenic Exposure

2021

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Cases of fire with highly flammable, combustible liquids and combustible gases with high potential heat emission at oil and gas facilities are assumed to develop as a hydrocarbon fire, which is characterized by the temperature rising rapidly up to 1093 ± 56 °C within five minutes from the test start and staying within the same range throughout the test, as well as by overpressure being generated. Although various fireproof coating systems are commonly used to protect steel structures from high temperatures, a combination of fire protection and cryogenic spillage protection, i.e., protection from liquefied natural gas (LNG), is rather an international practice novelty regulated by standards ISO 20088. Thanks to their outstanding features, i.e., ability to sustain chemical and climatic impact, these epoxy-based materials are able to ensure positive fireproof performance for steel structures in the case of potential cryogenic impact. The article discusses tests on steel structures coated with epoxy fireproof compounds, specifically PREGRAD-EP, OGRAX-SKE and Chartek 2218. The test records show the time from the start of cryogenic exposure to the said sample reaching the limit state, as well as the time from the start of heat impact to the sample reaching the limit state in case of hydrocarbon fire temperature.

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Cumulative damage of hollow glass microsphere weight fraction in polyurethane foam in response to cryogenic temperatures and repeated impact loading

Cited by 9 publications

References 33 publications

Preparation and energy absorption of flexible polyurethane foam with hollow glass microsphere

Preparation and energy absorption of flexible polyurethane foam with hollow glass microsphere

Effect of hollow glass microsphere on flame retardant and mechanical properties of polyurethane foams

Fire Protection of Steel Structures with Epoxy Coatings under Cryogenic Exposure

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