Metal Ion-Catalyzed Low-Temperature Curing of Urushiol-Based Polybenzoxazine.

ABSTRACT: In this work, urushiol-based polybenzoxazine is cured by the Lewis acid (FeCl₃, AlCl_3, and CuCl₂) at low temperature instead of high thermal curing temperature. The effect of the Lewis acid on structures and properties of the polymers is revealed. The relating urushiol-based benzoxazine monomer (BZ) was synthesized by natural urushiol, formaldehyde, and n-octylamine. The monomer was reacted with the Lewis acid with a molar ratio of 6:1 (N_monomer: N_Metal) at 80°C to obtain films that can be cured at room temperature. The chemical structures of benzoxazine monomers were identified by Fourier-transform infrared spectroscopy (FTIR) and ¹H nuclear magnetic resonance spectroscopy (¹H-NMR). The interaction between

SUBMITTER: Yang W 

PROVIDER: S-EPMC9096162 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature