Details

Autor(en) / Beteiligte

• Sunny, Jyothi V
• Francis, Raju

Titel

Recycling of other Layered Mixed Plastics or Resins: Polyurethanes

Ist Teil von

• Recycling of Polymers, 2017, p.1-1

Ort / Verlag

Germany: John Wiley & Sons

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Wiley Online Library All Obooks

Beschreibungen/Notizen

• The majority of the polyurethanes (PURs) are derived from aromatic polyisocyantes such as toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI), both polymeric and monomeric. The molecular weights, functionality, and structure of the polyols are very important for the development of PURs. Polyether polyols are the most common and largest group of polyols used for PURs. Recycling of PUR is receiving more and more attention worldwide now days due to excessive product development involving PUR for various applications. In addition, the use of isocyanates in product development is also being subjected to stringent environmental regulations. In mechanical recycling, the material is ground and rebonded, and this is oldest method for recycling PURs. Some of the chemical recycling methods used for recycling PUR are glycolysis, hydrolysis, and aminolysis. Thermochemical methods include pyrolysis, gasification, and hydrogenation, which are used as efficient recycling methods for polyurethanes. Several studies have been conducted on the methods for their practical applicability.