申请人:Colorado State University Research Foundation
公开号:US10759899B2
公开(公告)日:2020-09-01
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.
本发明公开了一类新型聚合物--反式环融聚(4-羟基丁酸酯)(RF-P4HB),该聚合物具有一系列独特的性能,包括强大的热稳定性和机械强度,可通过热分解和/或化学催化定量回收为结构单元,以及可在环境温度和压力下通过化学开环聚合反应方便地生产。本发明的另一个独特性质是,通过立体共混共结晶将两种对映异构体 RF-P4HB 链混合后,可形成具有高熔点的结晶立体共混聚合物。本发明还提供了相应的环融内酯单体结构,通过环与母体γ-丁内酯环的反式融合,可合成 RF-P4HB 聚合物。此外,还公开了一种用于合成 RF-P4HB 聚合物和共聚物的聚合或共聚工艺。