Ultrafast and selective recycling of poly(p-dioxanone) to monomers by using Brønsted–Lewis acidic ionic liquids as solvents/catalysts

Abstract

In recent years, chemical recycling to monomer (CRM) is emerging as an advanced strategy to deal with post-consumer plastics. Yet, because it usually takes a long time to react at...

An anhydride -cured degradable epoxy insulating material exhibiting recyclability, reusability, and excellent electrical performance

“…We calculated the energy economy factor ( ε ), environmental factor ( E ), and environmental energy impact factor ( ξ ) for the newly synthesized materials. 35 The energy economy factor ( ε ) mainly reflects the ability of the reaction to occur rapidly. The environmental factor ( E ) is primarily an estimate of the environmental impact of the reagents used in the reaction.…”

Ring-Opening Polymerization of Lactones to Prepare Closed-Loop Recyclable Polyesters

“…pDO is a six-membered lactone bearing an ether moiety. The resultant PpDO is considered as a semicrystalline aliphatic polyester, which has been used as surgical sutures due to its excellent biocompatibility and good mechanical properties. , Notably, ROP of pDO and MDO (α-methylsubstituted pDO) can produce polyesters that possess closed-loop recyclable property due to their low T c s (Table , run 16 and 17). ,, However, the polyester synthesized by ROP of the seven-membered 1,5-dioxepan-2-one (DXO), an analogue of pDO, does not show closed-loop recyclable properties.…”

“…88,175 Notably, ROP of pDO and MDO (α-methylsubstituted pDO) can produce polyesters that possess closed-loop recyclable property due to their low T c s (Table 1, run 16 and 17). 108,176,177 However, the polyester synthesized by ROP of the sevenmembered 1,5-dioxepan-2-one (DXO), an analogue of pDO, does not show closed-loop recyclable properties. Recently, our group reported the synthesis of substituted DXOs and corresponding poly(ether-alt-ester)s by upcycling of P3HB (Figure 12a).…”

“…Reineke and co-workers reported the synthesis and polymerization of a novel disubstituted valerolactone, β-acetoxy-δ-methyl­valerolactone, which was derived from the renewable feedstock triacetic acid lactone (TAL). The ROP thermodynamic behavior was examined, and the resultant amorphous material displayed a T g of 25 °C (Table , run 15). Li et al prepared a series of poly­(ester–amide)­s (PEAs) by the ROP of morpholino-2,5-dione derivatives (MDs), which can be synthesized from α-hydroxy acids and α-amino acids. , These amorphous PEAs can also be directly depolymerized to pristine MDs under an amberlyst 15 ion-exchange resin.…”

Solvent-Free One-Pot Recycling of Polylactide to Usable Polymers and Their Closed-Loop Recyclability

“…Since nondegradable traditional plastics based on fossil fuels have caused severe issues of environmental pollution and resource shortage, − biodegradable plastics from renewable resource are attracting more attention in recent years. − Polylactide (PLA) is considered one of the most promising biopolymers due to its excellent biocompatibility, processability, and mechanical properties, − which could be applied to disposable plastics, textiles, food packaging, etc. − However, PLA can only be degraded into products like H 2 O and CO 2 in controlled industrial environments, and it takes a long time for the conversion of its degradation products back to PLA, , involving crop growth, fermentation, and polymerization. Therefore, the recycling of end-of-life PLA has been extremely concerned in academia and industry.…”