Effect of service temperature on the shear creep response of rigid polyurethane foam used in composite sandwich floor panels

Preparation and fire behavior of rigid polyurethane foams synthesized from modified urea–melamine–formaldehyde resins

“…Rigid polyurethane foams (RPUFs) have been used in many elds due to their outstanding insulation performance, dimensional stability, and low density. [1][2][3][4] However, RPUFs are ammable because of the weak covalent bond and foam structure, and notoriously, a large amount of smoke and toxic gases are released during the combustion of RPUFs, which can have severe environmental and health consequences. [5][6][7] Obviously, there is a need to improve the ame resistance of RPUFs.…”

Structural Performance of Polyurethane Foam-Filled Building Composite Panels: A State-Of-The-Art

“…Their results showed that with increasing temperature, the shear responses of PET and PU foams became more nonlinear. In a similar study, Garrido et al [52] presented an experimental and numerical analysis of the influence of temperature on the shear creep reaction of a rigid PU foam in composite panels. The results revealed that the foam's creep reaction increases with both stress level and temperature.…”

Investigating the influence of conduit residues on polyurethane plates

“…The chemical reaction that occurs between isocyanate and polyol forms a chemical bond by urethane links (-O-CO-NH-), which forms polyurethane because of polycondensation [14,43,44] . Isocyanate worked as a crosslinking agent, promoting solidification of the mixture, thus the proportions of the reactants were maintained for all composites [21,22] . Immediately after adding the curing agent, the mixture viscosity was suitable for being poured into the molds.…”

“…The physico-chemical properties of polyurethane are important for that purpose [5] . The material has suitable mechanical strength to be used as thermal insulation in applications such as precast insulated sandwich wall panels, in ceiling lining or floors, and inside wood frame walls [18][19][20][21] . Singh [8] , however, warns that this is not suitable for surface coating and interior finishes in buildings because it is not resistant to fire.…”