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The thermal stability and fire behaviour of a series of modified polyurethane foams has been studied by means of small-scale tests (spread of flame, oxygen index), thermogravimetric analyses and with the help of a cone calorimetr. These foams were prepared with three different flame retardants: poly(ammonium phosphate), diethyl N,N-bis(2-hydroxyethyl)amino-methyl phosphorate and triethyl phosphate...
The glycolysis process is the basis for a controlled degradation of crosslinked polyurethane for recycling. Flexible water-blown polyurethanes are polymers with repeating urethane and urea groups. When they undergo heating in presence of glycols and selective catalysts, the reaction of these groups leads to products that are liquid at room temperature. The transesterification reaction of the urethane...
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