公开(公告)号：US20240191032A1

公开(公告)日：2024-06-13

申请号：US18324739

申请日：2023-05-26

申请人： Duke University

发明人： Matthew BECKER ,  Virginia RITTER ,  Stephen CRAIG

IPC分类号： C08G75/045 ,  C07D491/107

CPC分类号： C08G75/045 ,  C07D491/107

摘要： In various embodiments. the present invention relates to a recyclable, semi-crystalline, mechanochromic elastomeric composition for use in sensor, strain-sensing and shape-memory applications having mechanochromism, SH, and SIC properties that are each strain rate-dependent. In various embodiments, the present invention is directed to a dipropiolate-derivatized spiropyran (SP) mechanophore and thiol-yne-derived stereoelastomers doped with these SP mechanophores. These SP doped, thiol-yne-derived stereoelastomers may be synthesized via a base-directed Michael addition polymerization reaction. These linear polymers have been found to be semi-crystalline, recyclable, and mechanochromic under several methods of mechanical activation.

公开(公告)号：US20240182747A1

公开(公告)日：2024-06-06

申请号：US18279747

申请日：2022-03-01

申请人： Duke University

发明人： Matthew BECKER ,  Yongjun SHIN

IPC分类号： C09D167/06 ,  B33Y70/00 ,  C08G63/58 ,  C08G63/83 ,  C08G63/91 ,  C09D7/20

CPC分类号： C09D167/06 ,  B33Y70/00 ,  C08G63/58 ,  C08G63/83 ,  C08G63/918 ,  C09D7/20

摘要： In various embodiments, the present invention relates to a series 3D printable, biodegradable, poly(propylene fumarate) derivative ABA type triblock copolymers having a flexible propylene succinate core unit synthesized through ring-opening copolymerization using a Mg(BHT)2(THF)2 catalyst followed by isomerization. 3D printing utilizing thiol-ene chemistry yield precise structure with improved build time. 3D printed products are fully degraded in hydrolytic conditions and the mechanical properties and degradation rate can be tailored by the polymer composition and resin formulation.