[EN] RECYCLABLE POLYMERS BASED ON RING-FUSED GAMMA-BUTYROLACTONES<br/>[FR] POLYMÈRES RECYCLABLES SUR LA BASE DE GAMMA-BUTYROLACTONES À CYCLES CONDENSÉS
申请人:UNIV COLORADO STATE RES FOUND
公开号:WO2020027845A1
公开(公告)日:2020-02-06
The invention discloses a class of new polymers, trans-ring-fused poly(4-hydroxybutyrate)s (RF-P4HB) that exhibit a unique set of properties, including robust thermal stability and mechanical strength, quantitative recyclability to the building block monomers via thermolysis and/or chemical catalysis, and convenient production from the chemical ring-opening polymerization under ambient temperature and pressure. Another unique property is the formation of crystalline stereocomplexed polymers with high melting temperature upon mixing the two enantiomeric RF-P4HB chains via stereocomplexing co-crystallization. This invention also provides the corresponding ring-fused lactone monomer structures that enable the synthesis of the RF-P4HB polymers, through trans-fusing of rings to the parent γ-butyrolactone ring. Furthermore, a polymerization or copolymerization process for the synthesis of RF-P4HB polymers and copolymers is disclosed.