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Journal articles on the topic 'Fluid-Filled Cellular Polymer Foam'

Author: Grafiati

Published: 6 September 2023

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1

Venkataramana, K., Ram Kumar Singh, Anindya Deb, Vivek Bhasin, K. K. Vaze, and H. S. Kushwaha. "Blast Protection of Infrastructure with Fluid Filled Cellular Polymer Foam." Procedia Engineering 173 (2017): 547–54. http://dx.doi.org/10.1016/j.proeng.2016.12.088.

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2

Lagzdiņš, Aivars, Alberts Zilaucs, Ilze Beverte, and Jānis Andersons. "Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets." Materials 15, no. 3 (2022): 1033. http://dx.doi.org/10.3390/ma15031033.

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Rigid low-density plastic foams subjected to mechanical loads typically exhibit a nonlinear deformation stage preceding failure. At moderate strains, when the geometrical nonlinearity is negligible, such foam response is predominantly caused by the nonlinearity of deformation of their principal structural elements—foam struts. Orientational averaging of stresses in foam struts enables estimation of the stresses taken up by foams at a given applied strain. Based on a structural model of highly porous anisotropic cellular plastics filled with clay nanoplatelets and the orientational averaging, a

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3

Carneiro, Vitor Hugo, Hélder Puga, and José Meireles. "Vibration Damping and Acoustic Behavior of PU-Filled Non-Stochastic Aluminum Cellular Solids." Metals 11, no. 5 (2021): 725. http://dx.doi.org/10.3390/met11050725.

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Aluminum-based cellular solids are promising lightweight structural materials considering their high specific strength and vibration damping, being potential candidates for future railway vehicles with enhanced riding comfort and low fuel consumption. The filling of these lattices with polymer-based (i.e., polyurethane) foams may further improve the overall vibration/noise-damping without significantly increasing their density. This study explores the dynamic (i.e., frequency response) and acoustic properties of unfilled and polyurethane-filled aluminum cellular solids to characterize their be

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4

Moore, S. E. "Effect of Polymer Structure on the Long-Term Aging of Rigid Polyurethane Foam." Journal of Thermal Insulation 15, no. 4 (1992): 279–93. http://dx.doi.org/10.1177/174425919201500402.

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The effect of polymer structure on both initial and aged thermal conductivity ( K-factor) or thermal resistivity ( R-value) was explored by using a new procedure to estimate the long-term thermal resistance of gas-filled cellular plastics proposed by Norton [1], Edgecombe [2] and Bomberg [3]. This method uses a semi-logarithmic plot of thermal resistivity versus time that produces two distinct stages in the data, thermal drift and plateau with a break point separating the two stages. The plateau stage was fit with a straight line in order to estimate the long-term thermal resistance or K-facto

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5

Wilk-Zajdel, Klaudia, Piotr Kasza, and Mateusz Masłowski. "Laboratory Testing of Fracture Conductivity Damage by Foam-Based Fracturing Fluids in Low Permeability Tight Gas Formations." Energies 14, no. 6 (2021): 1783. http://dx.doi.org/10.3390/en14061783.

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In the case of fracturing of the reservoirs using fracturing fluids, the size of damage to the proppant conductivity caused by treatment fluids is significant, which greatly influence the effective execution of hydraulic fracturing operations. The fracturing fluid should be characterized by the minimum damage to the conductivity of a fracture filled with proppant. A laboratory research procedure has been developed to study the damage effect caused by foamed and non-foamed fracturing fluids in the fractures filled with proppant material. The paper discusses the results for high quality foamed g

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6

Chen, Xiao Yuan, Royale S. Underhill, and Denis Rodrigue. "A Simple Method to Convert Cellular Polymers into Auxetic Metamaterials." Applied Sciences 13, no. 2 (2023): 1148. http://dx.doi.org/10.3390/app13021148.

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The objective of this study was to present a simple and environmentally friendly process combining low pressure (vacuum) and mechanical compression to convert low-density polyethylene (LDPE) foams into low-density foams (76–125 kg/m3) with negative tensile and compressive Poisson’s ratios (NPR). As a first step, four series of recycled LDPE foams (electronics packaging) with starting densities of 16, 21, 30 and 36 kg/m3 were used to determine the effect of different processing conditions including temperature and pressure. Based on the optimized conditions, the tensile and compressive Poisson

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7

Acosta, Andrey, Arthur B. Aramburu, Rafael Beltrame, et al. "Wood Flour Modified by Poly (Furfuryl Alcohol) as a Filler in Rigid Polyurethane Foams: Effect on Water Uptake." Polymers 14, no. 24 (2022): 5510. http://dx.doi.org/10.3390/polym14245510.

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The use of lignocellulosic fillers in rigid polyurethane foams (RPUFs) has been receiving great attention due to their good mechanical and insulation properties and the high sustainable appeal of the obtained cellular polymers, although high water uptakes are found in most of these systems. To mitigate this detrimental effect, RPUFs filled with wood flour (2.5% wt) were fabricated with the addition of furfuryl alcohol (FA) to create a polymer grafted with the wood filler. Two concentrations of FA (10 wt% and 15 wt%) were investigated in relation to the wood flour, and the RPUFs were characteri

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8

Katkeaw, Kuntida, Matthana Khangkhamano, and Rungrote Kokoo. "Microbubble technology for natural rubber latex foam production: The use of various gas-filled microbubbles." Cellular Polymers 41, no. 1 (2021): 21–29. http://dx.doi.org/10.1177/02624893211053672.

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In recent years, microbubble technology has attracted great attention in many application fields including water treatment, food processing, oil recovery, surface cleaning, and therapeutic applications. In this paper, microbubbles (MBs) of air, nitrogen, and argon were applied to produce natural rubber latex foams (NRLFs). The bubbles were generated by flowing the gas through a porous diffuser and latex. The effect of gas source on cellular structure, density, elasticity, indentation hardness, and flammability of the bubbled foams was discussed. Argon MBs offered the latex foams with fine cell

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9

Schonberg, William P. "Extending the NNO Ballistic Limit Equation to Foam-Filled Dual-Wall Systems." Applied Sciences 13, no. 2 (2023): 800. http://dx.doi.org/10.3390/app13020800.

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A key component in the quantitative assessment of the risk posed to spacecraft by the micrometeoroid and orbital debris (MMOD) environment is frequently referred to as a ballistic limit equation (BLE). A frequently used BLE for dual-wall configurations (which are commonly used on spacecraft to protect them against the MMOD environment) is the New Non-Optimum, or “NNO”, BLE. In design applications where a BLE is needed for a new structural system that has not yet been tested, but resembles to a fair degree a dual-wall system, it is common practice to equivalence the materials, thicknesses, etc.

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10

Huh, Chun, and William R. Rossen. "Approximate Pore-Level Modeling for Apparent Viscosity of Polymer-Enhanced Foam in Porous Media." SPE Journal 13, no. 01 (2008): 17–25. http://dx.doi.org/10.2118/99653-pa.

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Summary Foam is used in the oil industry in a variety of applications, and polymer is sometimes added to increase foam's stability and effectiveness. A variety of surfactant and polymer combinations have been employed to generate polymer-enhanced foam (PEF), typically anionic surfactants and anionic polymers, to reduce their adsorption in reservoir rock. While addition of polymer to bulk foam is known to increase its viscosity and apparent stability, polymer addition to foams for use in porous media has not been as effective. In this pore-level modeling study, we develop an apparent viscosity

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11

Antunes, Marcelo, Hooman Abbasi, and José Ignacio Velasco. "The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone." Polymers 13, no. 3 (2021): 437. http://dx.doi.org/10.3390/polym13030437.

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Polysulfone nanocomposite foams containing variable amounts of graphene nanoplatelets (0–10 wt%) were prepared by water vapor-induced phase separation (WVIPS) and supercritical CO2 (scCO2) dissolution. WVIPS foams with two ranges of relative densities were considered, namely, between 0.23 and 0.41 and between 0.34 and 0.46. Foams prepared by scCO2 dissolution (0.0–2.0 wt% GnP) were obtained with a relative density range between 0.35 and 0.45. Although the addition of GnP affected the cellular structure of all foams, they had a bigger influence in WVIPS foams. The storage modulus increased for

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12

Noureddine, Boumdouha, Safidine Zitouni, Boudiaf Achraf, Chabane Houssém, Duchet-Rumeau Jannick, and Gerard Jean-François. "Development and Characterization of Tailored Polyurethane Foams for Shock Absorption." Applied Sciences 12, no. 4 (2022): 2206. http://dx.doi.org/10.3390/app12042206.

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In this paper, different types of polyurethane foams (PUR) having various chemical compositions have been produced with a specific density to monitor the microstructure as much as possible. The foam may have a preferential orientation in the cell structure. The cellular polyurethane tends to have stubborn, typical cellular systems with strong overlap reversibility. Free expansion under atmospheric pressure enables formulas to grow until they are refined. Moreover, the physicochemical characterization of the developed foams was carried out. They later are described by apparent density, Shore ha

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13

Anbuchezhiyan, G., B. Mohan, and R. V. Karthikeyan. "Development of Magnesium Matrix Syntactic Foams Processed through Powder Metallurgy Techniques." Applied Mechanics and Materials 766-767 (June 2015): 281–86. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.281.

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The presence of Hollow particles instead of gas porosity provides a closed cell structure called Syntactic foams. Syntactic foams have gained significant attention in recent years due to their low density, moisture absorption and thermal expansion coefficient compared to other cellular materials, such as open and closed cell structured foams. In terms of mechanical behavior, it is generally more insightful to compare metal matrix syntactic foams with metal foams and metal matrix composites. In comparison with metal foams, they have high compressive yield strength and more homogenous mechanical

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14

Hilyard, N. C., and P. Collier. "A Structural Model for Air Flow in Flexible PUR Foams." Cellular Polymers 6, no. 6 (1987): 9–26. http://dx.doi.org/10.1177/026248938700600602.

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A new structural model based on the two term fluid flow equation of Gent and Rusch is described. The classical theory of flow through porous packed beds is used to relate the permeability and flow inertia coefficients to the average cell diameter, the tortuosity of the flow path and a skin friction coefficient. The model is used to predict how air flow is influenced by compression of the cellular matrix. Results of laboratory investigations are presented and compared with the model. For the most part good agreement is obtained for compressions up to about 60%. It is shown that the permeability

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15

Olszewski, Adam, Paulina Kosmela, Adam Piasecki, Mateusz Barczewski, and Aleksander Hejna. "The Impact of Isocyanate Index and Filler Functionalities on the Performance of Flexible Foamed Polyurethane/Ground Tire Rubber Composites." Polymers 14, no. 24 (2022): 5558. http://dx.doi.org/10.3390/polym14245558.

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The structure and performance of polyurethane (PU) foams are strongly driven by the stoichiometry of the polyaddition reaction, quantitatively described by the isocyanate index. It determines the balance between isocyanate and hydroxyl groups in the reacting system and is affected by the introduction of additional functionalities originated, e.g., from applied fillers. Nevertheless, this issue is hardly taken into account in research works. Herein, the structure and performance of PU/ground tire rubber (GTR) composites differing in their isocyanate index (from 0.8 to 1.2) and prepared with and

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16

Greene, W. B., D. S. Raso, M. C. Willingham, R. M. Silver, A. S. Greene, and J. A. Makeeff. "Silicon in rat knee joints after subcutaneous injection of dimethylpolysiloxane gel breast implant material." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 182–83. http://dx.doi.org/10.1017/s0424820100168645.

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Clinically, Electron Probe X-ray Microanalysis (EPMA) studies have detected elemental silicon (Si) in remote sites of chronic inflammation (skin, finger, knee and elbow) in patients who were previously implanted with a silicone polymer-filled breast augmentation prostheses. Subsequent biopsy material obtained from the fibrous tissue capsule surrounding the implant was found to contain abundant silicon in foamy macrophages. In the remote biopsies, the elemental silicon is believed to be derived from macrophages that originated in the connective tissue capsule.In order to study the possible cell

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17

Yetgin, Salih Hakan, and Hüseyin Unal. "A study of the cell morphology and mechanical properties of bumper material PP-T-EPDM composite foam." Cellular Polymers, January 23, 2023, 026248932311513. http://dx.doi.org/10.1177/02624893231151363.

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In this study, cellular polypropylene based composite foams were prepared using an universal injection moulding machine. The chemical foaming agent was added to neat polypropylene (PP) polymer, talc filled polypropylene (PP-T) composite and talc filled polypropylene/ethylene-propylene-diene blend (PP-T-EPDM) composite materials at the ratio of 1% and 2% by weight. The influence of foaming agent content on the mechanical and cellular properties of both neat PP polymer and PP composites was investigated. The results showed that the tensile strength, tensile modulus, impact strength, hardness, ce

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18

Walong, Alif, Bencha Thongnuanchan, Nattapon Uthaipan, Tadamoto Sakai, and Natinee Lopattananon. "Enhancing cellular structure, mechanical properties, thermal stability and flame retardation of EVA/NR blend nanocomposite foams by silicon dioxide-based flame retardant." Progress in Rubber, Plastics and Recycling Technology, August 31, 2021, 147776062110420. http://dx.doi.org/10.1177/14777606211042028.

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Flame retardant rubber foams of ethylene vinyl acetate (EVA)/natural rubber (NR)/layered silicate blends filled with silicon dioxide (SiO2) were prepared by using azodicarbonamide (ADC) as a blowing agent. Specifically, SiO2 was added in EVA/NR blend nanocomposites to produce good flame retardant foams. The properties of EVA/NR blend nanocomposite foams with different SiO2 loading (0, 20, 30, 40 parts per hundred rubber, phr) were investigated through transmission electron microscopy (TEM), scanning electron microscopy (SEM), rheological property test, mechanical property measurement, flammabi

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19

Du, Ngoc Uy Lan, Christian Bethke, Shuaiping Gong, Volker Altstaedt, and Holger Ruckdaeschel. "Foaming epoxy-amine-carbamate: The effect of different neat amines on rheological and cellular morphology." Journal of Cellular Plastics, March 23, 2023, 0021955X2311660. http://dx.doi.org/10.1177/0021955x231166007.

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The use of carbamate to foam epoxy depends significantly on the precured modulus to stabilize the cellular structure. The optimum precured modulus is developed from the reaction of epoxy resin and the neat amine. The selection of the neat amine relies on its reaction temperature with epoxy, which is required to be below the decomposition temperature of carbamate. This study investigates the effect of three different neat amines on the rheological behavior of foaming epoxy-carbamate-amine. They are bisphenol-A diglycidyl ether epoxy (DGEBA), isophorone diamine carbamate (IDPA.CO2), N-aminoethyl

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20

Walong, Alif, Bencha Thongnuanchan, Tadamoto Sakai, and Natinee Lopattananon. "Influence of silicon dioxide addition and processing methods on structure, thermal stability and flame retardancy of EVA/NR blend nanocomposite foams." Progress in Rubber, Plastics and Recycling Technology, September 2, 2020, 147776062095343. http://dx.doi.org/10.1177/1477760620953437.

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Rubber nanocomposite foams based on 60/40 ethylene vinyl acetate (EVA)/natural rubber (NR) were melt-mixed with flame retardant silicon dioxide (SiO2) (20 parts per hundred rubber, phr), and foamed by compression molding process. In this study, the effect of mixing phenomena of SiO2 through two different compounding techniques such as direct mixing (DM) and phase selective mixing (PSM) methods on structure, thermal stability, combustility and flame retardancy of EVA/NR blend nanocomposite foams were investigated. DM method is a melt mixing of EVA, NR, layered silicate and SiO2, followed by foa

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21

Wang, Jiankang, Houjian Fa, and Hongwei Lu. "Investigation into the effects of foaming variables on the cellular structure and expansion ratio of foamed TPU using response surface methodology." Journal of Cellular Plastics, March 16, 2023, 0021955X2311653. http://dx.doi.org/10.1177/0021955x231165344.

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Thermoplastic polyurethane elastomer (TPU) foams were prepared using the high-pressure autoclave with supercritical fluid carbon dioxide (SC-CO2). The effects of foaming variables (i.e. saturation temperature, saturation pressure, and depressurization rate) on cellular structure and expansion ratio were investigated. The model between expansion ratio and foaming variables was constructed using the Box-Behnken design (BBD) of response surface methodology (RSM), and analysis of variance (ANOVA) was conducted to evaluate the validity and significance of the model. Finally, the interactive effects

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