A new family of furan-based thermosetting materials will be discussed.  Furfuryl amine (FA) was coupled using aldehydes to form furan di-amine (DFDA) and tetra-amine (TFDA) molecules containing two or four furan rings respectively.  These amines form the basis for epoxy, benzoxazine, and polyimide thermosetting systems with unique properties. Furan-based epoxy amine systems were found to possess higher density and Young’s modulus (&gt;5 GPa), higher yield strength (&gt;150 MPa in compression), and improved flammability resistance compared to traditional epoxies. Benzoxazine monomers were synthesized by reacting DFDA’s with a number of bio-based phenolic compounds and formaldehyde resulting in solid powders that melt at temperatures ranging between 70°C and 150°C to form low-viscosity liquids. Onset cure temperature varied in the range of 120°C-240°C depending on composition. The resulting polybenzoxazine systems possess Tg’s ranging from 220°C to 280°C and char-yield as high as 70% measured at 800°C by TGA in an inert environment.   In addition to presenting the synthesis and performance characteristics of the new systems, economic and environmental considerations for scale-up will be discussed. This family of thermosetting systems could provide additional capability for applications that require good ambient performance characteristics as well thermal management in extreme environments.<br/>

High performance thermosetting polymer systems based on Furan building blocks

ACS Fall 2020 Virtual Meeting

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