Thermal latent and Low-Temperature polymerization of a Bio-Benzoxazine resin from natural renewable chrysin and furfurylamine

A novel bio-benzoxazine thermosetting resin (CHR-fa) showing low-temperature polymerization feature has been synthesized from renewable chrysin and furfurylamine. The structure of CHR-fa has been confirmed by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopies and elemental analysis. The involved intramolecular hydrogen bond between the phenolic hydroxyl and carbonyl group in CHR-fa is identified as an essential structural characteristic for investigating its thermal latent catalyzed polymerization behavior. The resulting polybenzoxazine coating derived from CHR-fa exhibits high hydrophobicity with a water contact angle of 97.1. In addition, the polybenzoxazine based on this biobased mono-benzoxazine shows a high thermal stability with a 10 wt% loss temperature of 366 C, a high char yield of 48% (800 degrees C, N-2), and a very low heat release capacity of 43.3 J/(g K). The combined advantages developed in the current study highlight the potential of bio-based mono-benzoxazine as thermosetting resin matrix for producing high-performance materials.

Automated summary

A novel bio-benzoxazine thermosetting resin with low-temperature polymerization feature has been developed. The resin exhibits high hydrophobicity, high thermal stability, and low heat release capacity, making it a potential matrix for producing high-performance materials.