Abstract

Biobased diamine, difuran diamine (B-DFDA) synthesized from benzaldehyde and furfurylamine, was innovatively used to synthesize novel bio-based benzoxazine (V-bfa and Gu-bfa) by reacting with vanillin and guaiacol, respectively. The curing behavior was studied by differential scanning calorimetry (DSC) and fourier transform infrared spectroscopy (FT-IR), revealing that V-bfa has a low curing temperature, and the aldehyde group was not only consumed but also engaged in the formation of hydrogen bonds. Meanwhile, the V-bfa monomer required lower activation energy (Ek = 119.2 kJ/mol and Eo = 120.9 kJ/mol), suggesting that the aldehyde group has a more unique effect, which may promote the ring opening of oxazine rings. Compared with poly(Gu-bfa), poly(V-bfa) has better mechanical properties, higher glass transition temperature (248 °C) and char yield (59.8%). At the same time, its lower dielectric constant (k) makes it promising for application in the field of electronic packaging and communications.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call