چكيده فارسي :
Polyurethane foams are disposed of not only at the end of their use but also as scrap during slabstock manufacturing, leading to an environmental and economic problem [1]. A detailed study of the main reaction parameters affecting the reaction and properties of the recovered polyol has been carried out. They include zinc oxide concentration as a catalyst, reaction temperature and mass ratio of treated foam to the glycolysis agent. Reactions were studied using various DEG and castor oil ratios and the recovered polyols were characterized and data compared with an authentic sample[2].
The goal of chemical recycling of flexible foams is to regain the polyols suitable for manufacturing new PUR foam. Glycolysis of PUR gives a mixture of original polyol, low-molecular-weight urethanes with hydroxy-end groups and other, secondary products such as aromatic amines, etc. The glycolysis of commercially manufactured flexible foams has been studied in order to obtain directly the polyol product that can be used in the production of new foams[3].
