Portal de Periódicos da CAPES

Polyurethane Foam Wastes Recycling under Microwave Irradiation

2010; Marcel Dekker; Volume: 49; Issue: 8 Linguagem: Inglês

10.1080/03602551003749635

1525-6111

Mir Mohammad Alavi Nikje, Fatemeh Mohammadi,

Chemical Synthesis and Reactions

Microwave-assisted (MW-assisted) glycolysis of waste-flexible polyurethane (PU) foams using pentaerythritol in combination with glycerin and sodium hydroxide as a PU bond degradation reagent is reported. Split phases appeared after complete foam digestion. The upper phase contained recycled polyol, and the lower phase was a brown liquid with highly functionalized oligomers, amines and unreacted degradation reagents and showed potential for application in rigid polyurethane foam formulation. Our studies showed the dependence of recovered polyol assay to the additional MW irradiation and amine-free polyol were achieved in high yields and purities.