Acoustical, damping and thermal properties of polyurethane/poly(methyl methacrylate)-based semi-interpenetrating polymer network foams

Moradi, Gholamreza; Nassiri, Parvin; Ershad‐Langroudi, Amir; Monazzam, Mohammad Reaz

doi:10.1080/14658011.2018.1468146

Cited by 23 publications

(24 citation statements)

References 44 publications

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“…The disappearance of these bands approves the completion of curing reactions by the polymerization of PU and PMMA components and hence, the formation of the desired IPN grades. The results of this study are consistent with those obtained by Moradi et al (15).…”

Section: Discussionsupporting

confidence: 94%

“…The purified MMA monomer and EDMA (1% of MMA) were mixed together with BPO initiator (0.15% of MMA) and stirred at room temperature for 5 min to form a homogeneous solution. Then, the temperature was raised to 78°C to dissolve the initiator (15).…”

Section: Pu/pmma Ipn Synthesizementioning

confidence: 99%

“…The reaction then proceeded at 80°C for 1 hour. After a few minutes, the mixture was quickly poured into a Teflon flask and placed in an oven at 55, 65, 85, and 110°C for a final polymerization at 24 hours intervals (15). The PU/PMMA mass ratio in the IPN Figure 1.…”

Section: Pu/pmma Ipn Synthesizementioning

confidence: 99%

“…IPNs are classified according to the four factors including chain synthesis, network structure, the nature of transverse couplings, and the type of mixing. IPNs can be formed simultaneously, sequentially, or by the latex technique (15).…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

et al. 2018

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Background: Polymer composites with interpenetrated polymer network (IPN) structure are widely used as sound and vibration damping materials due to their high viscoelastic properties within the glass transition temperature range. In this study, polyurethane (PU)/poly (methyl methacrylate) (PMMA)-based interpenetrating polymer network with different ratios of PU to PMMA (i.e. 85:15, 75:25, and 65:35) were prepared by in situ polymerization. Methods: The properties of as-prepared IPN and its components were evaluated by different scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and sound absorption. Tensile properties were also determined. As indicators of effective damping capability, viscoelastic parameters including loss factor (tan δ), glass transition temperature (Tg), and effective damping interval (tan δ > 0.3) were also determined. In order to determine the sound absorption coefficient in the prepared IPNs, a two-microphone impedance tube at the frequency of one octave was used. Results: The comparison of pure polymers (i.e. polyurethane and polymethyl methacrylate) and prepared IPNs indicated that the semi interpenetrated polymer network morphology was created through a broader range of tan δ in different IPNs. Incorporation of PMMA into polyurethane in the form of interpenetrating polymer networks enhanced the damping acoustic properties of the semi-IPNs due to the permeability of the two polymers. In the temperature range of-50 to 11˚C, both IPNs components showed high damping characteristics (tan δ ≥ 0.3). Conclusions: Evaluation of the results indicated that the blends are capable of exerting viscoelastic effects for damping and sound attenuation.

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Section: Discussionsupporting

confidence: 94%

Section: Pu/pmma Ipn Synthesizementioning

confidence: 99%

Section: Pu/pmma Ipn Synthesizementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

et al. 2018

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“…Noise pollution has a wide range of undesirable health-and non-health-related effects [1]. With the development of new technologies, in particular the development of faster and more powerful devices, concerns have been raised over noise pollution and many efforts have been made to effectively control this kind of pollution [2,3]. Accordingly, the subject of noise has become a serious and complex problem, and the need for research in this field has increased for a better life and working environment [4], which has prompted researchers to work on controlling noise.…”

Section: Introductionmentioning

confidence: 99%

Improving the Sound Absorption Properties of Flexible Polyurethane (PU) Foam using Nanofibers and Nanoparticles

Hajizadeh¹,

Khavanin²,

Barmar³

et al. 2019

Sound&Vibration

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Polyurethane foam as the most well-known absorbent materials has a suitable absorption coefficient only within a limited frequency range. The aim of this study was to improve the sound absorption coefficient of flexible polyurethane (PU) foam within the range of various frequencies using clay nanoparticles, polyacrylonitrile nanofibers, and polyvinylidene fluoride nanofibers. The response surface method was used to determine the effect of addition of nanofibers of PAN and PVDF, addition of clay nanoparticles, absorbent thickness, and air gap on the sound absorption coefficient of flexible polyurethane foam (PU) across different frequency ranges. The absorption coefficient of the samples was measured using Impedance Tubes device. Nano clay at low thicknesses as well as polyacrylonitrile nanofibers and polyvinyl fluoride nanofibers at higher thicknesses had a greater positive effect on absorption coefficient. The mean sound absorption coefficient in the composite with the highest absorption coefficient at middle and high frequencies was 0.798 and 0.75, respectively. In comparison with pure polyurethane foam with the same thickness and air gap, these values were 2.22 times at the middle frequencies and 1.47 times at high frequencies, respectively. Surface porosity rose with increasing nano clay, but decreased with increasing polyacrylonitrile nanofibers and polyvinyl fluoride nanofibers. The results indicated that the absorption coefficient was elevated with increasing the thickness and air gap. This study suggests that the use of a combination of nanoparticles and nanofibers can enhance the acoustic properties of flexible polyurethane foam.

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Hydroxyl‐terminated polybutadiene based waterborne polyurethane acrylate emulsions: Synthesis, characterization, and damping property

Deng

et al. 2020

J of Applied Polymer Sci

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A new kinds of waterborne polyurethane acrylate (WPUA) dispersions were synthesized based on isophorone diisocyanate (IPDI), hydroxyl‐terminated polybutadiene (HTPB), 1, 4‐butanediol (1, 4‐BDO), polytetramethylene ether glycol (PTMG), dimethylolpropionic acid (DMPA), 2‐ethylhexyl acrylate (EHA), and methyl methacrylate (MMA) as main raw materials. The influence of the HTPB content on the particle size, storage stability of the WPUA dispersions and the damping property of cured films were studied by using dynamic light scattering (DLS), dynamic mechanical analysis (DMA), respectively. It can be found the WPUA dispersions have a good stability and the damping temperature range of loss tangent (tan δ) >0.3 reaches a maximum (−26.6–79.14°C) when the content of HTPB is 20%. The HTPB based WPUA could be applied to damping material.

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Acoustical, damping and thermal properties of polyurethane/poly(methyl methacrylate)-based semi-interpenetrating polymer network foams

Cited by 23 publications

References 44 publications

Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

Improving the Sound Absorption Properties of Flexible Polyurethane (PU) Foam using Nanofibers and Nanoparticles

Hydroxyl‐terminated polybutadiene based waterborne polyurethane acrylate emulsions: Synthesis, characterization, and damping property

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