Advances in the Synthesis of Chemically Recyclable Polymers

• Published in: Chemistry, an Asian journal Vol. 18; no. 3; pp. e202201167 - n/a
• Main Authors: Li, Xin‐Lei, Ma, Kai, Xu, Fei, Xu, Tie‐Qi
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 01-02-2023
• Subjects: carbon dioxide emissions; chemical recyclable polymers; Chemical synthesis; Chemistry; Degradation; Depolymerization; Design for recycling; Energy consumption; Esters; monomer design; Monomers; Polymers; Polyolefins; Recycling; waste plastics; waste plastics; depolymerization; chemical recyclable polymers; carbon dioxide emissions; monomer design
• ISSN: 1861-4728; 1861-471X
• DOI: 10.1002/asia.202201167

The development of modern society is closely related to polymer materials. However, the accumulation of polymer materials and their evolution in the environment causes not only serious environmental problems, but also waste of resources. Although physical processing can be used to reuse polymers, the properties of the resulting polymers are significantly degraded. Chemically recyclable polymers, a type of polymer that degrades into monomers, can be an effective solution to the degradation of polymer properties caused by physical recycling of polymers. The ideal chemical recycling of polymers, i. e., quantitative conversion of the polymer to monomers at low energy consumption and repolymerization of the formed monomers into polymers with comparable properties to the original, is an attractive research goal. In recent years, significant progress has been made in the design of recyclable polymers, enabling the regulation of the “polymerization‐depolymerization” equilibrium and closed‐loop recycling under mild conditions. This review will focus on the following aspects of closed‐loop recycling of poly(sulfur) esters, polycarbonates, polyacetals, polyolefins, and poly(disulfide) polymer, illustrate the challenges in this area, and provide an outlook on future directions.
In recent years, significant progress has been made in the design of recyclable polymers, enabling the regulation of the “polymerization‐depolymerization” equilibrium and closed‐loop recycling under mild conditions. This review summarizes the closed‐loop recycling of poly(sulfur) esters, polycarbonates, polyacetals, polyolefins, and poly(disulfide) polymers, illustrates the challenges in this area, and provides an outlook on future directions.