US 11,987,668 B2
Resorbable complex shape memory poly(propylene fumarate) star scaffolds for 4D printing applications
Matthew Becker, Chapel Hill, NC (US); and Garrett Fredric Bass, Durham, NC (US)
Assigned to The University of Akron, Akron, OH (US)
Appl. No. 18/005,643
Filed by Matthew Becker, Chapel Hill, NC (US); and Garrett Fredric Bass, Durham, NC (US)
PCT Filed Jul. 15, 2021, PCT No. PCT/US2021/041837
§ 371(c)(1), (2) Date Jan. 16, 2023,
PCT Pub. No. WO2022/015989, PCT Pub. Date Jan. 22, 2022.
Claims priority of provisional application 63/052,168, filed on Jul. 15, 2020.
Prior Publication US 2023/0272159 A1, Aug. 31, 2023
Int. Cl. C08G 63/83 (2006.01)
CPC C08G 63/83 (2013.01) 12 Claims
 
1. A method for making poly(propylene fumarate-co-succinate) polymer comprising the time-dependent partial reduction of poly(propylene maleate) double bonds by sonication mediated by zinc and acetic acid to form a poly(propylene maleate-co-succinate) intermediate, followed by isomerization of the poly(propylene maleate-co-succinate) intermediate using an organic base to produce the poly(propylene fumarate-co-succinate) polymer.