Rigid polyurethane foams based on soybean oil

Guo, Andrew; Javni, Ivan; Petrovìć, Zoran S.

doi:10.1002/(sici)1097-4628(20000711)77:2<467::aid-app25>3.0.co;2-f

Cited by 319 publications

(191 citation statements)

References 15 publications

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“…Higher values were reported by Lee et al (2000) for liquefied corn bran PUFs with compressive strength at 10% strain of 76 kPa and compressive MOE of 1140 kPa. However, all of the foams in this study have compressive strengths that were lower than commercial foams, which have compressive strength at 10% strain of about 100 kPa (Guo et al 2000). …”

Section: Polyurethane Foamsmentioning

confidence: 99%

Cork Liquefaction for Polyurethane Foam Production

et al. 2017

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aCork is one of the most important forest products in Portugal. The cork processing industry is highly resource-efficient, and the only residue is cork powder, which is too small for agglomerate production. This work studied the usage of cork powder for the production of added-value products via polyol liquefaction. Liquefactions were performed in a reactor using a mixture of polyethylene glycol (PEG 400) and glycerol as solvents, which were catalyzed by the addition of sulphuric acid. Several cork-tosolvent ratios, reaction temperatures, and reaction times were tested. Polyurethane foams were prepared by combining polyol mixtures with a catalyst, surfactant, blowing agent, and polymeric isocyanate. Mechanical tests of the produced foams were conducted, and compressive modulus of elasticity and compressive stress at 10% deformation were determined. The results show that the best conditions for obtaining high liquefaction yields are as follows: 160 °C for 1 h; glycerol-to-PEG 400 ratio of 1:9; corkto-solvent ratio of 1:6; and 3% H2SO4 catalyst addition. The Fourier Transform Infrared (FTIR) spectra indicated that the lignocellulosic fractions of the cork were more selectively dissolved during acidified polyol liquefaction than the suberin. With liquefied cork powder using these optimized conditions, it is possible to produce polyurethane foams with desired properties.

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Section: Polyurethane Foamsmentioning

confidence: 99%

Cork Liquefaction for Polyurethane Foam Production

et al. 2017

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“…The mixing ratio, (Monteavaro et al 2005). More closed cells may survive on the other scenario when gas formation completes earlier than gelation (Guo et al 2000).…”

Section: Thermal Conductivity Measurementsmentioning

confidence: 99%

Characterization of Insulation Performance, Poststability, and Foaming Process of Rigid Polyurethane Sandwich Panel for Cold Storage Warehouse

Sun

et al. 2017

J. Mater. Civ. Eng.

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Polyurethane (PU) is a commonly used insulation material for cold storage warehouses. The insulation performance of PU sandwich panels made from blended blowing agents were reassessed by k-factor measurements and insulation thickness calculation based on cold warehouse design standard, which has proved the significant impact of blowing agent difference on energy saving. The foam post-stability was also evaluated by mathematic profiling. The developed 3D paraboloid model based on gridding measurements has provided scientific method for panel shrinkage evaluation. Cell microstructure characterization and post-growth angle coefficients calculation were further performed for better understanding the shrinkage problem at microscopic level. The foaming process model of continuous panel production was developed based on FOAMAT characterization which has provided theoretical solution to panel processing.

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“…Moreover, life cycle assessment of vegetable oil polyols shows environmental benefits like reduction in the demand of fossil resources and formation of very low greenhouse gas emission [4]. Therefore, the hydroxylated derivatives of vegetable oils are interesting and alternative replacements for petrochemical polyols in the synthesis of PUR materials [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Palm Oil-Based Polyol on the Properties of Flexible Polyurethane Foams

2011

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This paper describes the effect of the modification of polyurethane system with palm oil-based polyol on the cell structure and physical-mechanical properties of polyurethane foams. Flexible polyurethane foams were prepared by substituting a part of petrochemical polyether-polyol with the palm oil polyol. Selected physical-mechanical properties of these foams were examined and compared to the properties of reference foam. The properties such as apparent density, tensile strength, elongation at break, resilience, compressive stress and thermal stability were analyzed. It was found that the modifications of polyurethane formulation with palm oil polyol allow to improve selected properties of final products.

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Rigid polyurethane foams based on soybean oil

Cited by 319 publications

References 15 publications

Cork Liquefaction for Polyurethane Foam Production

Cork Liquefaction for Polyurethane Foam Production

Characterization of Insulation Performance, Poststability, and Foaming Process of Rigid Polyurethane Sandwich Panel for Cold Storage Warehouse

Influence of Palm Oil-Based Polyol on the Properties of Flexible Polyurethane Foams

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