ORGS5-0239
Sustainable Synthesis of CO2-derived Non-isocyanate Polyurethane and Its Chemical Recycling via Amine-mediated Depolymerization
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Jihwan Park (KAIST)
Co-Author(s)
Abstract
Non-isocyanate polyurethane (NIPU) represents a sustainable alternative to conventional PU by eliminating the need for toxic isocyanate monomers. One example of NIPU is polyhydroxyurethane (PHU), synthesized from bis(cyclic carbonate) (BCC) and diamine. In this study, we report a CO2-derived pathway to prepare PHU together with a chemical recycling strategy that enables closed-loop polymer degradation and regeneration. BCC monomers were synthesized via catalytic CO2 fixation into epoxides and subsequently reacted with diamines to produce PHUs. Chemical recycling was achieved through diamine-mediated aminolysis, generating amino-terminated oligomers that could be repolymerized through reaction with additional BCC monomers. Repeated depolymerization and repolymerization cycles demonstrated effective chemical recyclability while maintaining the molecular characteristics of the regenerated PHUs.
