Log in

Relevant bibliographies by topics / Cellular Polymer Foams / Journal articles

To see the other types of publications on this topic, follow the link: Cellular Polymer Foams.

Journal articles on the topic 'Cellular Polymer Foams'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Cellular Polymer Foams.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Handa, Y. Paul, and Zhiyi Zhang. "Layered Foams: A New Class of Cellular Polymers." Cellular Polymers 19, no. 4 (2000): 241–55. https://doi.org/10.1177/026248930001900401.

Full text

Abstract:

A novel process is described for making integral multilayered polymers with the layers separated by discontinuous narrow gaps containing air and/or a blowing agent. The two step process involves first introducing a low degree of entanglement among some of the polymer chains and then breaking apart these entanglements using a blowing agent to give the discontinuous gaps that resemble elongated, narrow cells. The layer density can be controlled within a wide range, typically 10 to 2000 layers/mm, while the gap between the layers is < 100 nanometers. These layered materials, called nanolayered

APA, Harvard, Vancouver, ISO, and other styles

2

Du, Changling, David Anthony Fikhman, and Mary Beth Browning Monroe. "Shape Memory Polymer Foams with Phenolic Acid-Based Antioxidant Properties." Antioxidants 11, no. 6 (2022): 1105. http://dx.doi.org/10.3390/antiox11061105.

Full text

Abstract:

Phenolic acids (PAs) are natural antioxidant agents in the plant kingdom that are part of the human diet. The introduction of naturally occurring PAs into the network of synthetic shape memory polymer (SMP) polyurethane (PU) foams during foam fabrication can impart antioxidant properties to the resulting scaffolds. In previous work, PA-containing SMP foams were synthesized to provide materials that retained the desirable shape memory properties of SMP PU foams with additional antimicrobial properties that were derived from PAs. Here, we explore the impact of PA incorporation on SMP foam antiox

APA, Harvard, Vancouver, ISO, and other styles

3

Woolley, W. D. "Are Foams a Fire Hazard?" Cellular Polymers 4, no. 2 (1985): 81–115. http://dx.doi.org/10.1177/026248938500400201.

Full text

Abstract:

Over the last decade growing concern has been voiced about the fire hazards of cellular polymers used in building and transport applications. Some of this concern is justified as illustrated by recent fires and experimental simulations where rapid fire development has occurred with potential for death or injury from the spread of combustion products within very short periods of time. Many technical difficulties have arisen in the use of synthetic foams. Their introduction has presented problems since the test methods used traditionally to assess performance have been somewhat inadequate to cop

APA, Harvard, Vancouver, ISO, and other styles

4

Suethao, Supitta, Darshil U. Shah, and Wirasak Smitthipong. "Recent Progress in Processing Functionally Graded Polymer Foams." Materials 13, no. 18 (2020): 4060. http://dx.doi.org/10.3390/ma13184060.

Full text

Abstract:

Polymer foams are an important class of engineering material that are finding diverse applications, including as structural parts in automotive industry, insulation in construction, core materials for sandwich composites, and cushioning in mattresses. The vast majority of these manufactured foams are homogeneous with respect to porosity and structural properties. In contrast, while cellular materials are also ubiquitous in nature, nature mostly fabricates heterogeneous foams, e.g., cellulosic plant stems like bamboo, or a human femur bone. Foams with such engineered porosity distribution (grad

APA, Harvard, Vancouver, ISO, and other styles

5

Kishimoto, Satoshi, Toru Shimizu, Fu Xing Yin, Kimiyoshi Naito, and Yoshihisa Tanaka. "Mechanical Properties of Metallic Closed Cellular Materials Containing Polymer Fabricated by Polymer Penetration." Materials Science Forum 654-656 (June 2010): 2628–31. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2628.

Full text

Abstract:

Metallic closed cellular materials containing polymer were fabricated by the penetrating polymer into metal foam. The aluminum and stainless steel foams were selected for the metal foam and epoxy resin and polyurethane resin were selected for the penetrated polymer. The many kinds of mechanical properties of this material were measured. The results of the compressive tests show that these materials have different stress-strain curves among the specimens that containing different materials in the cells. Also, this metallic closed cellular materials containing polymer have higher compressive str

APA, Harvard, Vancouver, ISO, and other styles

6

Hamdi, Ouassim, and Denis Rodrigue. "Auxetic Polymer Foams: Production, Modeling and Applications." Current Applied Polymer Science 4, no. 3 (2021): 159–74. http://dx.doi.org/10.2174/2452271604666211130123921.

Full text

Abstract:

: Auxetic materials have high potential due to their exceptional properties resulting from a negative Poisson’s ratio. Recently, several auxetic polymer-based materials have been developed. In fact, several applications are looking for a lightweight material (less material consumed in production and transport) while having high mechanical performances (impact absorption, rigidity, strength, resistance, etc.). So, a balance between density and toughness/strength is highly important, especially for military, sporting, and transport applications. So auxetic materials (especially foams) can provid

APA, Harvard, Vancouver, ISO, and other styles

7

Fan, Zhi Geng, Chang Qing Chen, and Wen Jun Hu. "A Numerical Study on the Large Deformations of Polymer Foams with Spherical Pores." Advanced Materials Research 295-297 (July 2011): 1581–85. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1581.

Full text

Abstract:

Cubic structures having spherical pores ranged as BCC and FCC lattices are constructed to simulate the microstructures of cellular polymers with various relative densities. The Mooney-Rivlin strain energy potential model is adopted to characterize the hyperelasticity of the constituent solid from which the foams are made. Finite element analysis on the influences of the polymer hyperelasticity upon the macroscopic mechanical properties of the foams is carried out. Numerical results show that there is no obvious buckling plateau segment in the uniaxial compressive stress-strain curves of the re

APA, Harvard, Vancouver, ISO, and other styles

8

Román-Lorza, S., M. A. Rodriguez-Perez, and J. A. De Saja Sáez. "Cellular Structure of Halogen-Free Flame Retardant Foams Based on LDPE." Cellular Polymers 28, no. 4 (2009): 249–68. http://dx.doi.org/10.1177/026248930902800402.

Full text

Abstract:

Composites of LDPE/ATH (up to 70 wt.%) were foamed to create new materials with good fire retardancy properties and low weight, proving the feasibility of developing cellular structures when high levels of inorganic fillers are included. An experimental study was carried out to explore the effects of chemical composition on cellular structure as well as the effect of structure on their thermal, mechanical and combustion properties. Samples fabrication was carried out using an improved compression moulding route consisting of polymer compounding, precursor preparation and foaming under pressure

APA, Harvard, Vancouver, ISO, and other styles

9

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

10

Harikrishnan, S., Kamlesh Kumar, V. Venkateswara Rao, and Ajay Misra. "Shock Wave Behaviour of Polymeric Materials for Detonation Waveshapers." Defence Science Journal 71, no. 6 (2021): 730–36. http://dx.doi.org/10.14429/dsj.71.16943.

Full text

Abstract:

This paper discusses the experimental determination of explosive shock attenuation parameters of four different polymers viz., Teflon, Phenol formaldehyde, Polyethylene foam and Polypropylene foam. These polymers are candidate materials for waveshapers in shaped charge warheads. Cylindrical specimens of the polymer materials were subjected to explosive shock loading by the detonation of RDX:Wax (95:5). Shock arrival time was measured using piezo-wafers positioned at known spatial intervals in the specimens. Initial shock velocity, stabilised shock velocity and attenuation constant were determi

APA, Harvard, Vancouver, ISO, and other styles

11

Soriano-Corral, F., L. A. Calva-Nava, J. F. Hernández-Gámez, et al. "Influence of Ethylene Plasma Treatment of Agave Fiber on the Cellular Morphology and Compressive Properties of Low-Density Polyethylene/Ethylene Vinyl Acetate Copolymer/Agave Fiber Composite Foams." International Journal of Polymer Science 2021 (March 25, 2021): 1–13. http://dx.doi.org/10.1155/2021/9150310.

Full text

Abstract:

Agave fibers (AF) were incorporated either pristine (AFp) or surface treated by ethylene plasma (AFm) in low-density polyethylene (LDPE)/ethylene vinyl acetate (EVA) blends at a ratio of 1 : 1 and foamed by chemical means. The role of the AF content (3, 6, 9, 12, and 15 wt.%) and its surface modification on the cellular morphology and mechanical properties of LDPE/EVA/AF foams under compression is investigated herein. Fourier transform-infrared spectroscopy, contact angle, and water suspension of AF suggest that plasma treatment using ethylene successfully modifies the surface nature of AF fro

APA, Harvard, Vancouver, ISO, and other styles

12

Talal, Sina, and Philip C. Miller Tate. "Comparison of the Recovery Mechanisms of Rigid Polymer Foams following Long Term Compression." Cellular Polymers 18, no. 5 (1999): 315–27. https://doi.org/10.1177/026248939901800502.

Full text

Abstract:

The full recovery of rigid polymer foams following long periods of compression was investigated using polyurethane, polyethylene and polyimide foams. Compressive stress-strain testing of the foams showed them all to behave in the typical manner with the resultant curves exhibiting linear-elastic, stress-plateau and densification regions. Recovery of all of the foams tested following long periods of compression at ambient conditions manifested itself in the form of two distinct phases. The initial rapid phase 1 recovery was attributed solely to the bulk polymer whilst the cellular structure was

APA, Harvard, Vancouver, ISO, and other styles

13

Alpern, V., and F. Shutov. "Filled and Reinforced Foamed Plastics: Foaming, Processing, Properties and Applications. Part 1: General Principles and the Main Problems." Progress in Rubber and Plastics Technology 11, no. 4 (1995): 268–83. https://doi.org/10.1177/147776069501100404.

Full text

Abstract:

This the first paper of a series related to physical chemistry of foaming, cellular structure, mechanical and physical properties, processing and application of filled and reinforced foamed plastics. Part 1 deals with several general introductory discussions regarding classification of foamed polymers and fillers for foams, both interstructural and instrastructural ones; and the place of filled foamed plastics in the family of polymer foams. A short historical review of filled foamed plastics’ industrial developments is presented. Then the brief main technical concepts and industrial developme

APA, Harvard, Vancouver, ISO, and other styles

14

Rodríguez-Pérez, M. A. "The Effect of Chemical Composition, Density and Cellular Structure on the Dynamic Mechanical Response of Polyolefin Foams." Cellular Polymers 21, no. 2 (2002): 117–36. http://dx.doi.org/10.1177/026248930202100202.

Full text

Abstract:

Dynamic mechanical analysis has been applied to a collection of polyolefin foams with different chemical compositions and densities and manufactured from different routes. The effect of different foam characteristics, such as density, polymer morphology and cellular structure on the dynamic mechanical response is analysed. The way in which this technique can be used to obtain information about the polymer morphology of the foam is presented. In addition, examples of the use of this technique in studying specific problems are illustrated.

APA, Harvard, Vancouver, ISO, and other styles

15

Kishimoto, Satoshi. "Closed Cellular Materials for Smart Materials." Materials Science Forum 638-642 (January 2010): 2074–79. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2074.

Full text

Abstract:

New methods to fabricate a metallic closed cellular material for smart materials using an isostatic pressing and penetrating method are introduced. Powder particles of polymer or ceramics coated with a metal layer using electro-less plating were pressed into pellets and sintered at high temperature. These powder particles were sintered by spark plasma sintering (SPS) method. Closed cellular materials including polymer were fabricated by penetrating polymer into metallic foams. Many kinds of metallic closed cellular materials including different materials from that of cell walls were tried to f

APA, Harvard, Vancouver, ISO, and other styles

16

Aghelinejad, Mohammadmehdi, and Siu Leung. "Thermoelectric Nanocomposite Foams Using Non-Conducting Polymers with Hybrid 1D and 2D Nanofillers." Materials 11, no. 9 (2018): 1757. http://dx.doi.org/10.3390/ma11091757.

Full text

Abstract:

A facile processing strategy to fabricate thermoelectric (TE) polymer nanocomposite foams with non-conducting polymers is reported in this study. Multilayered networks of graphene nanoplatelets (GnPs) and multi-walled carbon nanotubes (MWCNTs) are deposited on macroporous polyvinylidene fluoride (PVDF) foam templates using a layer-by-layer (LBL) assembly technique. The open cellular structures of foam templates provide a platform to form segregated 3D networks consisting of one-dimensional (1D) and/or two-dimensional (2D) carbon nanoparticles. Hybrid nanostructures of GnP and MWCNT networks sy

APA, Harvard, Vancouver, ISO, and other styles

17

Sun, Jiaotong, and Dan Zhou. "Advances in Graphene–Polymer Nanocomposite Foams for Electromagnetic Interference Shielding." Polymers 15, no. 15 (2023): 3235. http://dx.doi.org/10.3390/polym15153235.

Full text

Abstract:

With the continuous advancement of wireless communication technology, the use of electromagnetic radiation has led to issues such as electromagnetic interference and pollution. To address the problem of electromagnetic radiation, there is a growing need for high-performance electromagnetic shielding materials. Graphene, a unique carbon nanomaterial with a two-dimensional structure and exceptional electrical and mechanical properties, offers advantages such as flexibility, light weight, good chemical stability, and high electromagnetic shielding efficiency. Consequently, it has emerged as an id

APA, Harvard, Vancouver, ISO, and other styles

18

Fei, Yanpei, Wei Fang, Mingqiang Zhong, et al. "Extrusion Foaming of Lightweight Polystyrene Composite Foams with Controllable Cellular Structure for Sound Absorption Application." Polymers 11, no. 1 (2019): 106. http://dx.doi.org/10.3390/polym11010106.

Full text

Abstract:

Polymer foams are promising for sound absorption applications. In order to process an industrial product, a series of polystyrene (PS) composite foams were prepared by continuous extrusion foaming assisted by supercritical CO2. Because the cell size and cell density were the key to determine the sound absorption coefficient at normal incidence, the bio-resource lignin was employed for the first time to control the cellular structure on basis of hetero-nucleation effect. The sound absorption range of the PS/lignin composite foams was corresponding to the cellular structure and lignin content. A

APA, Harvard, Vancouver, ISO, and other styles

19

Kankanamalage, Pulitha G., Jake Puppo, Denver Schaffarzick, and Bhisham Sharma. "Aluminum foams with complex pore topologies for acoustical applications." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A38. http://dx.doi.org/10.1121/10.0018067.

Full text

Abstract:

Metal foams are used in various industries due to the great variety of properties they possess such as high strength-to-weight ratio, high energy absorption, and the ability to endure extreme conditions. However, despite their desirable properties, traditional metal foams lack acoustic absorption properties because of their stochastic open porous structure—a function of the foaming process. Additive manufacturing (AM) can allow the fabrication of more complex foams; however, current metal AM methods provide significant processing and scalability challenges, especially in printing aluminum part

APA, Harvard, Vancouver, ISO, and other styles

20

Laguna-Gutierrez, Ester, Javier Pinto, Vipin Kumar, Maria L. Rodriguez-Mendez, and Miguel A. Rodriguez-Perez. "Improving the extensional rheological properties and foamability of high-density polyethylene by means of chemical crosslinking." Journal of Cellular Plastics 54, no. 2 (2016): 333–57. http://dx.doi.org/10.1177/0021955x16681454.

Full text

Abstract:

Obtaining high-density polyethylene-based microcellular foams is a topic of interest due to the synergistic properties that can be obtained by the fact of achieving a microcellular structure using a polymer with a high number of interesting properties. However, due to the high crystallinity of this polymer, the production of low-density microcellular foams, by a physical foaming process, is not a simple task. In this work, the proposed solution to produce these materials is based on using crosslinked high-density polyethylenes. By crosslinking the polymer matrix, it is possible to increase the

APA, Harvard, Vancouver, ISO, and other styles

21

Li, Ruo Song, Lu Li, and Tao Fang. "Producing Microporous PMMA with Supercritical CO₂ and the Research on its Properties." Advanced Materials Research 560-561 (August 2012): 873–79. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.873.

Full text

Abstract:

The research on microcellular polymer foam (MPF) is significant in plastic processing industry. In this study, polymethyl methacrylate (PMMA) was considered to be the foam matrix via a preliminary experiment. It is because that compared with other polymers, it is easier to swell and plasticize with supercritical CO2 (SCCO2). Moreover, its absorbability in SCCO2 is much higher. The above research provides guidance for the preparation of microcellular polymer blend foams. In order to study the foam process and the optimum experimental conditions, the average cellular sizes were measured by contr

APA, Harvard, Vancouver, ISO, and other styles

22

Borrero-López, Antonio M., Vincent Nicolas, Zelie Marie, Alain Celzard, and Vanessa Fierro. "A Review of Rigid Polymeric Cellular Foams and Their Greener Tannin-Based Alternatives." Polymers 14, no. 19 (2022): 3974. http://dx.doi.org/10.3390/polym14193974.

Full text

Abstract:

This review focuses on the description of the main processes and materials used for the formulation of rigid polymer foams. Polyurethanes and their derivatives, as well as phenolic systems, are described, and their main components, foaming routes, end of life, and recycling are considered. Due to environmental concerns and the need to find bio-based alternatives for these products, special attention is given to a recent class of polymeric foams: tannin-based foams. In addition to their formulation and foaming procedures, their main structural, thermal, mechanical, and fire resistance propertie

APA, Harvard, Vancouver, ISO, and other styles

23

Betke, Ulf, Katja Schelm, Andreas Rodak, and Michael Scheffler. "Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties." Materials 13, no. 11 (2020): 2437. http://dx.doi.org/10.3390/ma13112437.

Full text

Abstract:

Open-celled ceramic composite foams were prepared from NiO and yttria-stabilized zirconia (YSZ) powders by the polymer sponge replication (Schwartzwalder) technique using the respective aqueous dispersions. Mechanically stable NiO–YSZ foams with an average porosity of 93 vol.% were obtained. After chemical reduction of the NiO phase with hydrogen, cellular Ni–YSZ cermet structures were obtained. They are characterized by an electric conductivity up to 19∙103 S∙m−1 which can be adjusted by both, the Ni volume fraction, and the sintering/reduction procedure. The NiO–YSZ ceramic foams, as well as

APA, Harvard, Vancouver, ISO, and other styles

24

Izzard, V. G., C. H. Bradsell, H. Hadavinia, et al. "Performance of Nylon Based Polymer Foams at Elevated Temperature under Tensile Loading." Key Engineering Materials 488-489 (September 2011): 286–89. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.286.

Full text

Abstract:

One of the primary applications of polymer based cellular solids is to act as an energy absorbing material during impact where compressive strain rates may reach 500-800/s. In reality, impacts occur over a wide range of temperatures and velocities at different angles of incidence. Understanding and modelling the behaviour of the polymer foams requires characterisation of the material response in detail. The stress-strain response that covers both compressive and tensile behaviour for a wide range of strain rates and temperatures are needed to characterize the mechanical performance of polymer

APA, Harvard, Vancouver, ISO, and other styles

25

Zhao, Biao, Ruoming Wang, Yang Li, et al. "Dependence of electromagnetic interference shielding ability of conductive polymer composite foams with hydrophobic properties on cellular structure." Journal of Materials Chemistry C 8, no. 22 (2020): 7401–10. http://dx.doi.org/10.1039/d0tc00987c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Himmelsbach, Andreas, Tobias Standau, Johannes Meuchelböck, Volker Altstädt, and Holger Ruckdäschel. "Approach to quantify the resistance of polymeric foams against thermal load under compression." Journal of Polymer Engineering 42, no. 4 (2022): 277–87. http://dx.doi.org/10.1515/polyeng-2021-0312.

Full text

Abstract:

Abstract Nowadays, numerous techniques are used to quantify the resistance of cellular polymers against a thermal load. These techniques differ in significance and reproducibility and are all dependent on foam density, structure (i.e., cell size and -distribution) and sample geometry. Very different behaviors are expected for extrusion- and bead foams, as well as for amorphous and semi-crystalline polymers. Moreover, established tests use temperature ramps which would lead to temperature gradients within the sample and thus to faulty results. In this study, we developed a new approach from an

APA, Harvard, Vancouver, ISO, and other styles

27

Wang, Long, Kiyomi Okada, Yuta Hikima, Masahiro Ohshima, Takafumi Sekiguchi, and Hiroyuki Yano. "Effect of Cellulose Nanofiber (CNF) Surface Treatment on Cellular Structures and Mechanical Properties of Polypropylene/CNF Nanocomposite Foams via Core-Back Foam Injection Molding." Polymers 11, no. 2 (2019): 249. http://dx.doi.org/10.3390/polym11020249.

Full text

Abstract:

Herein, lightweight nanocomposite foams with expansion ratios ranging from 2–10-fold were fabricated using an isotactic polypropylene (iPP) matrix and cellulose nanofiber (CNF) as the reinforcing agent via core-back foam injection molding (FIM). Both the native and modified CNFs, including the different degrees of substitution (DS) of 0.2 and 0.4, were melt-prepared and used for producing the polypropylene (PP)/CNF composites. Foaming results revealed that the addition of CNF greatly improved the foamability of PP, reaching 2–3 orders of magnitude increases in cell density, in comparison to th

APA, Harvard, Vancouver, ISO, and other styles

28

Agrawal, A. K., B. Singh, Y. S. Kashyap, M. Shukla, B. S. Manjunath, and S. C. Gadkari. "Gamma-irradiation-induced micro-structural variations in flame-retardant polyurethane foam using synchrotron X-ray micro-tomography." Journal of Synchrotron Radiation 26, no. 5 (2019): 1797–807. http://dx.doi.org/10.1107/s1600577519009792.

Full text

Abstract:

Flame-retardant polyurethane foams are potential packing materials for the transport casks of highly active nuclear materials for shock absorption and insulation purposes. Exposure of high doses of gamma radiation causes cross-linking and chain sectioning of macromolecules in this polymer foam, which leads to reorganization of their cellular microstructure and thereby variations in physico-mechanical properties. In this study, in-house-developed flame-retardant rigid polyurethane foam samples were exposed to gamma irradiation doses in the 0–20 kGy range and synchrotron radiation X-ray micro-co

APA, Harvard, Vancouver, ISO, and other styles

29

Maier, Johanna, Thomas Behnisch, Vinzenz Geske, et al. "Investigation of the Foam Development Stages by Non-Destructive Testing Technology Using the Freeze Foaming Process." Materials 11, no. 12 (2018): 2478. http://dx.doi.org/10.3390/ma11122478.

Full text

Abstract:

With a novel Freeze Foaming method, it is possible to manufacture porous cellular components whose structure and composition also enables them for application as artificial bones, among others. To tune the foam properties to our needs, we have to understand the principles of the foaming process and how the relevant process parameters and the foam’s structure are linked. Using in situ analysis methods, like X-ray microcomputed tomography (µCT), the foam structure and its development can be observed and correlated to its properties. For this purpose, a device was designed at the Institute of Lig

APA, Harvard, Vancouver, ISO, and other styles

30

Almanza, O. A., M. A. Rodriguez-Pírez, and J. A. de Saja. "The Thermal Conductivity of Polyethylene Foams Manufactured by a Nitrogen Solution Process." Cellular Polymers 18, no. 6 (1999): 385–400. https://doi.org/10.1177/026248939901800602.

Full text

Abstract:

The thermal conductivity, the cellular structure and the matrix polymer morphology of a collection of chemically crosslinked low-density closed cell polyethylene foams, manufactured by a high-pressure nitrogen gas solution process, have been studied. With the aid of theoretical models, the relative contributions of each heat transfer mechanism to the total thermal conductivity has been evaluated. The results show that, the relative contribution of the thermal radiation is (22-34%), and that this contribution is mainly controlled by the mean cell size and by the carbon black content in the foam

APA, Harvard, Vancouver, ISO, and other styles

31

Hamdi, Ouassim, Frej Mighri, and Denis Rodrigue. "Optimization of the cellular morphology of biaxially stretched thin polyethylene foams produced by extrusion film blowing." Cellular Polymers 37, no. 4-6 (2018): 153–68. http://dx.doi.org/10.1177/0262489318797517.

Full text

Abstract:

This work presents the production of cellular polymer films using extrusion blowing to impose biaxial stretching on the cellular structure while processing. The materials selected are linear low-density polyethylene (LLDPE) and low density polyethylene (LDPE) as the matrix, azodicarbonamide as the chemical blowing agent, and talc as the nucleating agent. The processing parameters, namely, the temperature profile, screw speed, feed rate, take-up ratio, blow-up ratio, and the matrix composition were all optimized to produce a homogeneous cellular structure with defined morphologies. The optimize

APA, Harvard, Vancouver, ISO, and other styles

32

Román-Lorza, Silvia, J. Sabadell, J. J. García-Ruiz, Miguel A. Rodríguez-Pérez, and J. A. S. Sáez. "Fabrication and Characterization of Halogen-Free Flame Retardant Polyolefin Foams." Materials Science Forum 636-637 (January 2010): 198–205. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.198.

Full text

Abstract:

Mayor advances have been made in the field of halogen-free flame retardant composites in the last years, mainly due to increasing regulatory pressures. This paper focuses in aluminium trihydroxide (ATH) as the halogen-free flame retardant and low density polyethylene (LDPE) as the polymer matrix of the fire retardancy foam. The attempt of this article is to achieve a cellular structure by foaming these materials, when high loading levels (up to 60wt %) of ATH are introduced. This is a difficult task due to the high amount of filler in the formulation. The aim is to reduce density without losin

APA, Harvard, Vancouver, ISO, and other styles

33

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

34

Llovera-Segovia, Pedro, Gustavo Ortega-Braña, Vicente Fuster-Roig, and Alfredo Quijano-López. "Charging of Piezoelectric Cellular Polypropylene Film by Means of a Series Dielectric Layer." Polymers 13, no. 3 (2021): 333. http://dx.doi.org/10.3390/polym13030333.

Full text

Abstract:

Piezoelectric polymer cellular films have been developed and improved in the past decades. These piezoelectric materials are based on the polarization of the internal cells by means of induced discharges in the gas inside the cells. Internal discharges are driven by an external applied electric field. With this polarization method, cellular polypropylene (PP) polymers exhibit a high piezoelectric coefficient d33 and have been investigated because of their low dielectric polarization, high resistivity, and flexibility. Charging polymers foams is normally obtained by applying a corona discharge

APA, Harvard, Vancouver, ISO, and other styles

35

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

36

Marter, Alex D., Alexander S. Dickinson, Fabrice Pierron, Yin Ki (Kiki) Fong, and Martin Browne. "Characterising the compressive anisotropic properties of analogue bone using optical strain measurement." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 233, no. 9 (2019): 954–60. http://dx.doi.org/10.1177/0954411919855150.

Full text

Abstract:

The validity of conclusions drawn from pre-clinical tests on orthopaedic devices depends upon accurate characterisation of the support materials: frequently, polymer foam analogues. These materials often display anisotropic mechanical behaviour, which may considerably influence computational modelling predictions and interpretation of experiments. Therefore, this study sought to characterise the anisotropic mechanical properties of a range of commonly used analogue bone materials, using non-contact multi-point optical extensometry method to account for the effects of machine compliance and une

APA, Harvard, Vancouver, ISO, and other styles

37

Magiera, Anna, Monika Kuźnia, and Wojciech Jerzak. "Analysis of the Structural, Chemical, and Mechanical Characteristics of Polyurethane Foam Infused with Waste from Thermal Processing." Materials 18, no. 6 (2025): 1327. https://doi.org/10.3390/ma18061327.

Full text

Abstract:

The continuous generation of agricultural, industrial, and urban waste necessitates effective waste management strategies. One promising approach is incorporating these residues as fillers in polymer composites. This study investigated the influence of coal processing-derived fillers, specifically microspheres and fluidized-bed combustion fly ash, on the structure and properties of composite rigid polyurethane foam. Polyurethane foams were produced through manual mixing and casting, with composite foams containing a combination of 5% microspheres and 5–15% fly ash by weight. The analysis of th

APA, Harvard, Vancouver, ISO, and other styles

38

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

39

Magiera, Anna, Monika Kuźnia, Wojciech Jerzak, Magdalena Ziąbka, Radosław Lach, and Bartosz Handke. "Microspheres as potential fillers in composite polymeric materials." E3S Web of Conferences 108 (2019): 02009. http://dx.doi.org/10.1051/e3sconf/201910802009.

Full text

Abstract:

Microspheres used in our work were acquired from one of Kazakhstan coal-fueled power plant. The size of the microspheres varied between 45 and 400 μm, the median particle size (D50) was 158 μm. Microscopic analysis revealed that the material consisted mainly of cenospheres. The results of elemental and oxide analysis showed that microspheres were composed of aluminosilicates. Identified crystalline phases were mullite (approx. 12 %) and trace amount of quartz (silica). Microscopic observations of the cross-sectional surface of both unmodified PUR foam and foams modified with microspheres showe

APA, Harvard, Vancouver, ISO, and other styles

40

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

41

Manninen, Allan R., Hani E. Naguib, A. Victoria Nawaby, Xia Liao, and Michael Day. "The Effect of Clay Content on PMMA-Clay Nanocomposite Foams." Cellular Polymers 24, no. 2 (2005): 49–70. http://dx.doi.org/10.1177/026248930502400201.

Full text

Abstract:

In this study the CO2 sorption at 45 °C in PMMA nanocomposite films containing 2 wt.% of nanoclay has been measured using an in-situ gravimetric technique. The films examined were prepared by compression moulding material obtained by dry-blend and solvent co-precipitation techniques. The CO2 diffusion coefficients were found to be higher for the dry-blended nanocomposite due to the larger agglomerations of the organoclay agglomerations, which prevented the polymer chains from fully wetting and intercalating the clay particles. The Tg-p profile for PMMA nanocomposite containing 2 wt.% nanoclay

APA, Harvard, Vancouver, ISO, and other styles

42

Weingart, Nick, Daniel Raps, Mingfu Lu, Lukas Endner, and Volker Altstädt. "Comparison of the Foamability of Linear and Long-Chain Branched Polypropylene—The Legend of Strain-Hardening as a Requirement for Good Foamability." Polymers 12, no. 3 (2020): 725. http://dx.doi.org/10.3390/polym12030725.

Full text

Abstract:

Polypropylene (PP) is an outstanding material for polymeric foams due to its favorable mechanical and chemical properties. However, its low melt strength and fast crystallization result in unfavorable foaming properties. Long-chain branching of PP is regarded as a game changer in foaming due to the introduction of strain hardening, which stabilizes the foam morphology. In this work, a thorough characterization with respect to rheology and crystallization characteristics of a linear PP, a PP/PE-block co-polymer, and a long-chain branched PP are conducted. Using these results, the processing win

APA, Harvard, Vancouver, ISO, and other styles

43

Hrimchum, Kittipong, Darunee Aussawasathien, and Todsapol Kajornprai. "Injection Moldable Poly(Lactic Acid)-Poly(Butylene Succinate)-Activated Carbon Composite Foams: Effects of PLA/PBS Ratios." Key Engineering Materials 798 (April 2019): 322–30. http://dx.doi.org/10.4028/www.scientific.net/kem.798.322.

Full text

Abstract:

Poly (lactic acid) (PLA)-poly (butylene succinate) (PBS)-activated carbon (AC) composites were foamed via an injection molding process. Azodicarbonamide (ADC) was used as a chemical blowing agent. The effect of PLA/PBS ratios (0/100, 10/90, 20/80, 30/70, 40/60, 50/50 wt% and vice versa) on the cell formation and properties of composite foams such as cellular structure, foam density (ρf), void fraction (Vf), cell density, melt flow index (MFI), thermal and mechanical properties and crystallinity were investigated. At same ADC and AC loadings (5 phr), PBS acted as nucleating sites for cell gener

APA, Harvard, Vancouver, ISO, and other styles

44

Mohd, Umair, D. K. Chauhan Dr., and Ahmad Wani Tanveer. "Steel Foam Inspired from Human Bones." International Journal of Trend in Scientific Research and Development 3, no. 1 (2018): 492——495. https://doi.org/10.31142/ijtsrd18993.

Full text

Abstract:

Historically, the concept to create synthetic cellular substances have to have been stimulated by means of herbal materials such as pumice stone, timber or bone that have all been in use for a lengthy time due to their special properties. Since the 20th century, cell substances are engineered from dense primary materials, their houses are investigated systematically and it is decided in which situations they are the highest quality to their dense counterparts. The matrix fabric of cellular substances or, greater specific, foams can be a polymer or another organic material, a glass, a ceramic o

APA, Harvard, Vancouver, ISO, and other styles

45

Güzel, Kübra, Jan-Christoph Zarges, and Hans-Peter Heim. "Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate." Materials 15, no. 10 (2022): 3634. http://dx.doi.org/10.3390/ma15103634.

Full text

Abstract:

The quantitative study of the structure and properties relationship in cellular materials is mostly limited to cell diameter, cell density, skin layer thickness, and cell size distribution. In addition, the investigation of the morphology is generally carried out in two dimensions. Therefore, the interrelation between morphological properties and mechanical characteristics of the foam structure has remained in an uncertain state. In this study, during the physical foaming process, a foam morphology is locally created by using a mold equipped with a core-back insert. The variation in morphology

APA, Harvard, Vancouver, ISO, and other styles

46

Gorejová, Radka, Renáta Oriňaková, Zuzana Orságová Králová, et al. "In Vitro Corrosion Behavior of Biodegradable Iron Foams with Polymeric Coating." Materials 13, no. 1 (2020): 184. http://dx.doi.org/10.3390/ma13010184.

Full text

Abstract:

Research in the field of biodegradable metallic scaffolds has advanced during the last decades. Resorbable implants based on iron have become an attractive alternative to the temporary devices made of inert metals. Overcoming an insufficient corrosion rate of pure iron, though, still remains a problem. In our work, we have prepared iron foams and coated them with three different concentrations of polyethyleneimine (PEI) to increase their corrosion rates. Scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDX), Fourier-transform infrared spectroscopy (FT-IR), and

APA, Harvard, Vancouver, ISO, and other styles

47

Yang, Yang, Shuiping Zeng, Xiping Li, Zhonglue Hu, and Jiajia Zheng. "Ultrahigh and Tunable Electromagnetic Interference Shielding Performance of PVDF Composite Induced by Nano-Micro Cellular Structure." Polymers 14, no. 2 (2022): 234. http://dx.doi.org/10.3390/polym14020234.

Full text

Abstract:

Lightweight and efficient electromagnetic interference (EMI) shielding materials play a vital role in protecting high-precision electronic devices and human health. Porous PVDF/CNTs/urchin-like Ni composites with different cell sizes from nanoscale to microscale were fabricated through one-step supercritical carbon dioxide (CO2) foaming. The electrical conductivity and electromagnetic interference (EMI) shielding performance of the composites with different cell sizes were examined in detail. The results indicated that the nanoscale cell structure diminishes the EMI shielding performance of th

APA, Harvard, Vancouver, ISO, and other styles

48

Pop-Iliev, Remon. "Foaming Ability of Rotomolding Polyolefin Resins." Advanced Materials Research 875-877 (February 2014): 1560–64. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1560.

Full text

Abstract:

The main focus of the research presented in this paper is the investigation of the ability of various polyolefin resins to be converted into integral-skin cellular composites by using the rotational foam molding process. Integral-skin foamed rotational moldings are formally denoted as cellular composites ideally having a clearly distinct surface layer of solid skin of uniform thickness that is encapsulating a seamlessly coupled fine-celled foamed core or layer of uniform cell density and distribution. A systematic comparative material characterization study that attempts to derive practical gu

APA, Harvard, Vancouver, ISO, and other styles

49

Ahir, Mansi, Chandan Bodhak, and Ram K. Gupta. "Harnessing Enhanced Flame Retardancy in Rigid Polyurethane Composite Foams through Hemp Seed Oil-Derived Natural Fillers." Polymers 16, no. 11 (2024): 1584. http://dx.doi.org/10.3390/polym16111584.

Full text

Abstract:

Over the past few decades, polymer composites have received significant interest and become protagonists due to their enhanced properties and wide range of applications. Herein, we examined the impact of filler and flame retardants in hemp seed oil-based rigid polyurethane foam (RPUF) composites’ performance. Firstly, the hemp seed oil (HSO) was converted to a corresponding epoxy analog, followed by a ring-opening reaction to synthesize hemp bio-polyols. The hemp polyol was then reacted with diisocyanate in the presence of commercial polyols and other foaming components to produce RPUF in a si

APA, Harvard, Vancouver, ISO, and other styles

50

Lian, Xinghan, Wenjie Mou, Tairong Kuang, et al. "Synergetic effect of nanoclay and nano-CaCO3 hybrid filler systems on the foaming properties and cellular structure of polystyrene nanocomposite foams using supercritical CO2." Cellular Polymers 39, no. 5 (2020): 185–202. http://dx.doi.org/10.1177/0262489319900948.

Full text

Abstract:

Supercritical fluids have been widely used to prepare various polymer nanocomposite foams due to their high-efficiency, rich-resource, and environment-friendly characteristics. In this work, we prepared polystyrene (PS) nanocomposites with different contents of hybrid fillers of nanoclay and nano-calcium carbonate (nano-CaCO3) and then were foamed by batch foaming method using supercritical carbon dioxide as a physical blowing agent. The effect of hybrid nanofillers components and foaming temperature and pressure on the foaming properties and cellular structure of PS nanocomposite foams was sy

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!