Flexible polyurethane foam. III. Phosphoric acid as a flame retardant

Abstract

Polyurethane foam is flammable. Incorporating flame retardants in the material minimize this property and hence combustion susceptibility. Here, we developed a flame retardant as we synthesis a nanocomposite from polylactic acid (PLA) and kaolin. This was incorporate into flexible polyurethane foam. FTIR of incorporated foam shows peaks at 1099.26 cm -1 and 1267.51 cm -1 attributable to oxysilicane (Si-O-) and organosilicone (Si-C) respectively, suggesting an interaction between the foam and the nanocomposite. SEM was used to present the morphology of the foam formed, while the effect of the nanocomposite on the flame characteristics of polyurethane was studied at varying amount for optimum effect. The results showed that the flame propagation rate, flame duration, and after glow of foams formed decrease while ignition time and char formation increases with increase in the amount of PLA/kaolin nanocomposite incorporated. These results potentially presents PLA/kaolin nanocomposite as a good flame retardant for flexible polyurethane foam.

Influence of the storage of reactive urethane quasi-prepolymers in their composition and adhesion properties

“…Step 3 Char 800 1C (wt%) isocyanate and urethane in the case of allophanate [16]. Although after storage of the quasi-prepolymer, the allophanate formation was observed by 1 H-NMR, no additional degradation processes were observed by thermogravimetry.…”

“…The UUCPs were analyzed by thermogravimetry and modulated temperature differential scanning calorimetry. Thermogravimetric analysis (TGA): The thermograms of the UUCPs were recorded in a SETARAM instrument, model 92- 16,18. Approximately 10 mg of UUCP sample was heated from ambient temperature to 800 1C, at 5 1C/min, under nitrogen atmosphere.…”

Ignition, combustion, toxicity, and fire retardancy of polyurethane foams: A comprehensive review

“…Apart from relatively heavy polyurethane chain fragments, N 2 , CO, CO 2 , H 2 O, C 6 H 5 CH 3 , and HCN have been detected and reported by many authors. 40,[43][44][45]49,50 Two approaches to the estimation of the toxicity of degradation, pyrolysis, and combustion products of polyurethane foams have been reported: (1) analysis of volatile products and calculation of their toxicity and (2) toxicity tests with various animals. The composition of gases that evolve during the thermal decomposition of polyurethane foams in air and nitrogen was studied by Woolley and coworkers.…”

Effects of inorganic fillers on the flame‐retardant and mechanical properties of rigid polyurethane foams

“…Commonly used flame‐retardant additives mainly include halogen, phosphorus, nitrogen, etc. However, these traditional flame retardants cannot meet the public demands for good flame retardancy, mechanical properties, smoke suppression as well as low emission of toxic gas.…”