The Effects of Various Additive Components on the Sound Absorption Performances of Polyurethane Foams

Chen, Shuming; Jiang, Yang; Wang, Dengfeng

doi:10.1155/2015/317561

Cited by 36 publications

(29 citation statements)

References 29 publications

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“…He reported that such porosity is quite enough for reduction of sound propagation in interior spaces or to improve the control of outdoor noise propagation by use of this mortar as sound absorbing screens. Arena et al [31] reported the diameter of the perforation should be uniform and less than 0.3 mm for the better results. So from the researchers experimental evidence, it is quite clear that the synthesised PPCF bearing enrich porosity and high thermal stability which can effectively use as micro perforated panels for sound absorbing materials for various indoor applications.…”

Section: Thermogravimetric Analysis Of Ppcfmentioning

confidence: 96%

“…Henceforth, porous material has been received huge attention as a sound absorber due to presence of cavities/channel/interstices. Recent studies majorly focus on varying the morphological properties of the material such as polyurethane and foams to enhance the acoustic performances (e.g., vibration and acoustic attenuations) [31,32] . Yang et al [33] correlated the sound absorbing properties of the multilayered viscoelastic composites with different interface shapes.…”

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confidence: 99%

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Augmentation of Thermo-physical Properties of Porous Polymer Composite Film by Sonication

Debashis¹,

Rout²,

Padhi³

2018

Res. Rev. J Mat. Sci

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Porous Polymer Composite Films (PPCF) have drawn extensive attention in recent years due to their unique and diversified applications in various fields such as photonics, gas separation/sensing, catalysis, energy storage, biomedical and tissue engineering [1-3]. In particular, porous polymer composite film consisting carbonaceous filler such as activated carbon, graphene and carbon nanotube have enormous utilities due to their thermo-chemical stability, superior chemical resistance and excellent thermal/electrical conductivity [4-7]. Various fabrication techniques such as phase separation, direct foaming, emulsion templating, polymer foam replication, immersion precipitation, vortex method, dip coating and solidification processing have been developed for porous polymer film [8-10]. "Breath figures" is another well-known method to fabricate porous polymer film by condensation of water vapour on the surface of organic polymer solvent solution [11]. Usually, immersion precipitation method used for preparing organic porous polymer membrane. However, during the fabrication process, these methods required precise control over the processing environment. Sometimes these methods are not economically suitable [12]. Teng et al. [8] fabricated porous polymer composite films by use of chloroform solution of poly (3-hexylthiophene) (P3HT) and (6,6)-phenyl-C61-butyricacid-methyl-ester (PCBM) via the freeze-drying method to study its wettability and adhesion behavior. Kuo et al. [13] synthesized porous polystyrene/ poly (vinyl pyrrolidone) (PS/PVP) films, via phase separation in a dip-coating process, for anti reflection applications. Morita et al. [14] fabricated a porous composite membrane by the combination of polypyrrole (PPy) powder with a porous polypropylene film, which could be used to control ionic permeability. The desired property of any porous polymer composite film or any composite

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Section: Thermogravimetric Analysis Of Ppcfmentioning

confidence: 96%

mentioning

confidence: 99%

Augmentation of Thermo-physical Properties of Porous Polymer Composite Film by Sonication

Debashis¹,

Rout²,

Padhi³

2018

Res. Rev. J Mat. Sci

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“…The addition of fibers made the foaming system more viscous and harder. What is worse, the fibers could not disperse evenly in the specimens [30]. In the foaming process, the fibers impeded the formation of pores, and thus suppressed the absorption of lowfrequency sound.…”

Section: Test Proceduresmentioning

confidence: 99%

Preparation and Performance Analysis of Foam-concrete Sound Absorbing Material Prepared Purely from Solid Wastes

Ji¹,

Liu²,

Tan³

et al. 2019

ACSM

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To control the pollution of industrial solid wastes and noises, this paper prepares foamconcrete sound absorbing materials purely from solid wastes like steel slag (SS), blast furnace slag (BFS) and desulfurized gypsum (DG) , and experimentally explores the effects of fiber content and aluminum powder content on the compressive strength and sound absorption of the foam-concrete prepared jointly by physical and chemical foaming. The results show that the addition of a proper amount of fibers can effectively enhance the compressive strength and high-frequency sound absorption of the material; when the aluminum powder content is 1 %, the physical-chemical combined foaming can produce a sound absorbing material with a high sound absorption coefficient at both medium and high frequencies, and the mean sound absorption coefficient can reach 0.457.

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“…Gwon et al reported the effects of a gelling catalyst and water amounts on sound absorption characteristics by optimizing cell morphology by increasing collision frequencies of the sound wave with air and solid walls. Chen et al studied applications of various foaming and cross‐linking agents to improve sound absorption property by examining porosity, airflow resistivity, and foam density. In addition, types of isocyanate molecular structure were also studied for increasing sound absorption performance by controlling phase separation by Sung et al…”

Section: Introductionmentioning

confidence: 99%

Sound absorption behavior of flexible polyurethane foams including high molecular‐weight copolymer polyol

Sung

Kim

2017

Polymers for Advanced Techs

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Noise pollution is an important issue for automotive industries. In this article, the high molecularweight copolymer polyol is blended in the polyol mixtures for fabricating flexible polyurethane foams to improve sound absorption efficiency. Changes of cavity size and material density of the foams are negligible by inclusion of copolymer polyol in the polyol mixture, but the closed pore ratio and specific airflow resistance increase for the copolymer polyol content higher than 20 wt% because of changes of phase separation behavior from drainage flow rate reduction that occurs with increased viscosity. Sound absorption efficiency increases with increasing copolymer polyol content up to 20 wt%, but it decreases beyond this point. The sound absorption property mainly results from the closed pore ratio, not from the cavity size. The compression strength increases with increasing copolymer polyol contents by increased amount of hard segments.Therefore, an optimum amount of high molecular-weight polyol is recommended for enhanced sound absorption property.

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The Effects of Various Additive Components on the Sound Absorption Performances of Polyurethane Foams

Cited by 36 publications

References 29 publications

Augmentation of Thermo-physical Properties of Porous Polymer Composite Film by Sonication

Augmentation of Thermo-physical Properties of Porous Polymer Composite Film by Sonication

Preparation and Performance Analysis of Foam-concrete Sound Absorbing Material Prepared Purely from Solid Wastes

Sound absorption behavior of flexible polyurethane foams including high molecular‐weight copolymer polyol

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