Physical properties of garnet-filled polyurethane foam composite

Jang, Se Young; Kim, D. J.; Seo, Kap-Ho

doi:10.1002/1097-4628(20010214)79:7<1336::aid-app220>3.0.co;2-d

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…Polyurethane foams (PUFs) are usually produced by the reaction of a polyisocyanate with a polyol or other reactants containing reactive groups with isocyanate. As a hydroxyl‐containing component, which is usually used as a reactive material with polyisocyanate, can have a wide range of molecular weights, functionalities, and types (ether and ester) and polyisocyanate is also variable in its structure (e.g., aromatic, aliphatic, or polycyclic),1 a variety of rigid PUFs can be produced with excellent characteristics, such as heat insulation, sound absorption, lightness, and shock proofing, and they are widely used in applications such as building insulation, appliances, transportation, and furniture 2, 3. However, the biggest disadvantages of PUFs when they are used as structural or semistructural materials are their low mechanical strengths (e.g., compressive strength and tensile strength), which are key physical properties of materials for withstanding strain during use 4.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of colloidal carbon sphere/rigid polyurethane foam composites

Zhuang

Yang

2009

J of Applied Polymer Sci

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Sucrose decomposed under hydrothermal conditions, generating colloidal carbon spheres (CCSs) with a perfectly spherical morphology. X‐ray diffraction indicated that the main component of the CCSs was disordered carbon, and massive hydroxyl groups existed on the surface, as confirmed by Fourier transform infrared spectroscopy. CCSs were first introduced into polyurethane foams (PUFs), and CCS‐reinforced PUF (PUF/CCS) composites were synthesized. The introduction of CCSs did not increase the viscosity of polyol/CCS blends significantly. The good dispersion of CCSs and the compatibility between CCSs and polyurethane were confirmed by transmission electron microscopy measurements. The results of mechanical testing showed that PUF/CCS composites exhibited greatly improved mechanical properties in comparison with neat PUFs, and this could be ascribed to the finer cell structure of the PUF/CCS composites, which was inspected with scanning electron microscopy. Thermogravimetric analysis indicated that the effects of CCSs on the thermal stability of the foams were slight. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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Section: Introductionmentioning

confidence: 99%

“…In past decades, rigid PUFs reinforced with particles such as hollow glass spheres,5, 6 clay,7 garnet,1 and microsilica and nanosilica8 and with fibers such as glass fibers9 and lignin10 have been prepared and studied. In recent years, carbonaceous materials have attracted research interest, and several have been introduced into PUFs.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of colloidal carbon sphere/rigid polyurethane foam composites

Zhuang

Yang

2009

J of Applied Polymer Sci

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“…Goods et al studied the mechanical properties of aluminum powder fi lled particle that strengthened the properties of PUF (6) . Jang et al reported on the physical properties of garnet fi lled PUF composite (7) . Li Chang et al reported on the physical properties of soy fl our fi lled PU foam (8) .…”

Section: Introductionmentioning

confidence: 99%

Mechanical, Morphological and Thermal Properties of Rigid Polyurethane Foam: Effect of the Fillers

et al. 2007

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Rigid polyurethane foam (PUF) having different fillers such as precipitated silica (SiO2), precipitated calcium carbonate (CaCO3) and glass powder (GP) were prepared by blowing with distilled water. The effect of filler loading on different properties of PUF was studied. In this investigation, the filler content was varied from 5 to 50 parts per hundred of polyol (phr) by weight. The properties such as density, mechanical, morphological, water absorption, thermal conductivity and thermal properties of the filled PUF were compared with the neat PUF. The density of silica filled PUF decreases with an increase in the filler loading. In case of calcium carbonate and glass powder the density initially decreases with filler loading, but after a certain concentration of fillers there is an increase in density with filler content. The mechanical properties such as compressive stress at 10% strain, compressive modulus and hardness of the filled PUF decrease in comparison with the neat PUF, due to the reaction between isocyanate and surface functional group present in filler. In all cases, the water absorption of the PUF increases with the increase in filler loading, due to the decrease in the closed cell content. The thermal conductivity analysis of PUF shows that the insulation properties decrease with the increase in silica as well as CaCO3 loading. This is mainly due to formation of open and damaged cell structure. However, when glass powder is used as filler the thermal conductivity first decreases, but later increases with filler loading.

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“…Among the pine wood and hemp fibers used to reinforce microcellular cross-linked PU synthesized from a cas-tor oil-based polyol, hemp fibers provide the best dynamic flexibility, modulus and toughness characteristics (Aranguren et al, 2007). Abrasive properties of PU foam can be increased by adding garnet particles into the mixture (Jang et al, 2001). Stacking hardwood-based cellulose fiber mats between polyurethane films and using compression molding improves the tensile strength and modulus properties (Seyidbeyoglu et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers

Eki̇ci̇¹,

Kentli²,

Küçük³

2012

Archives of Acoustics

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The sound absorption property of polyurethane (PU) foams loaded with natural tea-leaf fibers and luffa cylindrica (LC) has been studied. The results show a significant improvement in the sound absorption property parallel to an increase in the amount of tea-leaf fibers (TLF). Using luffa-cylindrica as a filler material improves sound absorption properties of soft foam at all frequency ranges. Moreover, an increase in the thickness of the sample resulted in an improvement of the sound absorption property. It is pleasing to see that adding tea-leaf fibers and luffa-cylindrica to the polyurethane foam demonstrate a significant contribution to sound absorption properties of the material and it encourages using environmental friendly products as sound absorption material in further studies.

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Physical properties of garnet-filled polyurethane foam composite

Cited by 7 publications

References 4 publications

Preparation and characterization of colloidal carbon sphere/rigid polyurethane foam composites

Preparation and characterization of colloidal carbon sphere/rigid polyurethane foam composites

Mechanical, Morphological and Thermal Properties of Rigid Polyurethane Foam: Effect of the Fillers

Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers

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