Polymers are indispensable to humans in different applications due to their ease of manufacturing and overall performance.However,after a material lifetime,there is a large amount of polymer-based waste,which greatly ...Polymers are indispensable to humans in different applications due to their ease of manufacturing and overall performance.However,after a material lifetime,there is a large amount of polymer-based waste,which greatly contributes to the loss of valuable resources and environmental pollution.Thermoplastics may be readily recycled,but because of their flammability,large amounts of flame retardant(FR)ad-ditives are required for many applications.This results in a significant volume of FR polymeric wastes too,particularly halogenated plastics,which are subject to severe recycling regulations.In general,ther-moplastics containing FRs are raising concerns,as their effective recycling is strongly influenced by the chemical composition,additive content,and physicochemical characteristics of the waste stream.The recycling of FR thermosets is even more challenging due to their crosslinked and cured nature,which makes them resistant to melting and reprocessing.In many cases,traditional mechanical recycling meth-ods,such as grinding and melting,are not applicable to thermosetting polymers.Current recycling meth-ods do not always consider the recovery of the thermosetting/thermoplastic matrix and the presence of toxic FRs in the polymer network.Sorting and solvent washing treatment are important steps,which are usually performed before recycling the FR polymeric waste to reduce contamination in the following steps.展开更多
基金the Italian Ministry of Ed-ucation and Research,PON R&I 2014-2020-Asse IV“Istruzione e ricerca per il recupero-REACT-EU”-Azione IV.6-“Contratti di ricerca su tematiche Green”,for the financial support concerning his employment contractThe work was partially supported by funds from the Zuercher Stiftung fuer Textilforshung(Winterthur,Switzerland).
文摘Polymers are indispensable to humans in different applications due to their ease of manufacturing and overall performance.However,after a material lifetime,there is a large amount of polymer-based waste,which greatly contributes to the loss of valuable resources and environmental pollution.Thermoplastics may be readily recycled,but because of their flammability,large amounts of flame retardant(FR)ad-ditives are required for many applications.This results in a significant volume of FR polymeric wastes too,particularly halogenated plastics,which are subject to severe recycling regulations.In general,ther-moplastics containing FRs are raising concerns,as their effective recycling is strongly influenced by the chemical composition,additive content,and physicochemical characteristics of the waste stream.The recycling of FR thermosets is even more challenging due to their crosslinked and cured nature,which makes them resistant to melting and reprocessing.In many cases,traditional mechanical recycling meth-ods,such as grinding and melting,are not applicable to thermosetting polymers.Current recycling meth-ods do not always consider the recovery of the thermosetting/thermoplastic matrix and the presence of toxic FRs in the polymer network.Sorting and solvent washing treatment are important steps,which are usually performed before recycling the FR polymeric waste to reduce contamination in the following steps.
