The growing number of polyurethanes (PUs) produced every year has developed methods for their mechanical and chemical recycling which yield valuable products like substitutes for commercial polyols or flame-retardants. PUs can be produced in different shapes and forms (i.e., elastomers, flexible or rigid foams, coatings, etc.) using several different components (i.e., di- or polyisocyanates, ester- or ether-based polyols, low-molecular weight chain extenders, fillers, and other modifiers). Therefore, different recycling methods should be considered for a wide range of materials, including postproduction of postconsumer wastes) depending on their chemical structure and properties. This chapter presents a review of selected mechanical (e.g., regrinding and using as a filler, rebonding, and compression molding) and chemical (e.g., glycolysis, glycerolysis, acidolysis and phosphorolysis) recycling methods applicable for PUs. This chapter also presents examples of flame-retardants and flame-retarded PUs obtained by PU recycling, poly(ethylene terephthalate), and melamine formaldehyde foam.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1021/bk-2021-1399.ch012
- Category
- Publikacja monograficzna
- Type
- rozdział, artykuł w książce - dziele zbiorowym /podręczniku w języku o zasięgu międzynarodowym
- Language
- angielski
- Publication year
- 2021
