公开(公告)号：US20240158567A1

公开(公告)日：2024-05-16

申请号：US18492554

申请日：2023-10-23

申请人： COLORADO STATE UNIVERSITY RESEARCH FOUNDATION

发明人： Eugene CHEN ,  Ethan QUINN ,  Zhen ZHANG

IPC分类号： C08G63/06 ,  C08L67/04 ,  C09J167/04

CPC分类号： C08G63/06 ,  C08L67/04 ,  C09J167/04 ,  C08L2205/025

摘要： Syndio-rich P3HB (sr-P3HB), readily synthesized from the eight-membered meso-dimethyl diolide, has a unique set of stereomicrostructures comprising enriched syndiotactic [rr] and no isotactic [mm] triads but abundant stereo-defects randomly distributed along the chain. This sr-P3HB material is characterized by high toughness (UT=96 MJ/m3), as a result of its high elongation at break (>400%) and tensile strength (34 MPa), crystallinity (Tm=114° C.), and optical clarity (due to its sub-micron spherulites), and good barrier properties, while it still biodegrades in freshwater and soil. On the other hand, iso-rich P3HB (ir-P3HB) can be synthesized from the eight-membered rac-dimethyl diolide. While sr-P3HB exhibits excellent adhesion strength toward a variety of substrates, both sr-P3HB and ir-P3HB can substantially toughen brittle stereoperfect biological or synthetic P3HB. Both sr-P3HB and ir-P3HB can also be obtained from the four-membered rac-beta-butyrolactone with appropriate catalysts.