Li, Zheng published the artcileChemical Upcycling of Poly(3-hydroxybutyrate) into Bicyclic Ether-Ester Monomers toward Value-Added, Degradable, and Recyclable Poly(ether ester), Name: Ethyl 3-hydroxybutanoate, the main research area is chem upcycling polyhydroxybutyrate bicyclic monomers degradable polyether polyester; recyclable plastic waste.
The chem. recycling of plastic wastes into value-added products is an attractive strategy to reduce the consumption of fossil fuels and reduce the plastic pollution. We report here the facile upcycling of poly(3-hydroxybutyrate) (P3HB) into value-added polymerizable monomers and subsequent polymerization toward degradable and recyclable polymers. The bicyclic monomer 4-methyloctahydro-2H-benzo[b][1,4]dioxepin-2-one (4-MOHB) was first synthesized from P3HB through efficient steps. The obtained monomers underwent bulk ring-opening polymerization (ROP) catalyzed by stannous octoate (Sn(Oct)2) to give the amorphous materials. With benzyl alc. (BnOH) as an initiator, Sn(Oct)2 can effectively catalyze the ROP of bicyclic ether-ester monomers in a controllable fashion. Moreover, poly(4-methyloctahydro-2H-benzo[b][1,4]dioxepin-2-one) (P(4-MOHB)) showed a closed-loop recovery property due to the fused bicyclic monomer structure. The selective depolymerization of the P(4-MOHB) homopolymer back to 4-MOHB monomer can be easily realized using p-toluenesulfonic acid (TsOH) or Sn(Oct)2 as a catalyst in solution or in bulk. This strategy to recycle bioplastics into value-added materials has a promising application prospect and is beneficial to extend the life cycle of environment-friendly materials.
ACS Sustainable Chemistry & Engineering published new progress about Enthalpy. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Name: Ethyl 3-hydroxybutanoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics