Simulation Physical and Chemical Blowing Agents for Polyurethane Foam Production

Harith H. Al-Moameri; Ghanim Hassan; Baydaa Jaber

doi:10.1088/1757-899X/518/6/062001

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Publication Date

Wed May 01 2019

Journal Name

Iop Conference Series: Materials Science And Engineering

Volume

518

DOI

10.1088/1757-899X/518/6/062001

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Simulation Physical and Chemical Blowing Agents for Polyurethane Foam Production

Harith H. Al-Moameri

Ghanim Hassan

Baydaa Jaber

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AbstractUse of computer simulation to quantify the effectiveness of blowing agents can be an effective tool for optimizing formulations and for the adopting of new blowing agents. This paper focuses on a mass balance on blowing agent during foaming including the quantification of the amount that stays in the resin, the amount that ends up in the foam cells, and the pressure of the blowing agent in the foam cells. Experimental data is presented both in the sense of developing the simulation capabilities and the validating of simulation results.

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Publication Date

Thu Apr 06 2023

Journal Name

Materials Science Forum

Study of the Effect of Ce 3+ on the Gas Sensitivity and Magnetic Properties of CuxCe0.3-XNi0.7Fe2O4 Ferrite Nanoparticles

Tagreed M.

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This study includes the preparation of the ferrite nanoparticles Cu_xCe_0.3-XNi_0.7Fe₂O₄ (where: x = 0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3) using the sol-gel (auto combustion) method, and citric acid was used as a fuel for combustion. The results of the tests conducted by X-ray diffraction (XRD), emitting-field scanning electron microscopy (FE-SEM), energy-dispersive X-ray analyzer (EDX), and Vibration Sample Magnetic Device (VSM) showed that the compound has a face-centered cubic structure, and the lattice constant is increased with increasing Cu ion. On the other hand, the compound has apparent porosity and spherical particles, and t

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