A novel modified polybenzoxazine resin was prepared. The final product was characterized with Fourier
transform infrared spectrometry (FT-IR) and gel permeation chromatography (GPC). Processing capability and
cure behavior of the modified resin was investigated by rotary viscometer and differential scanning calorimetry (DSC),
respectively. The resin shows a low viscosity of 180 mPa·s at 60℃ for above 6 hours, indicating that the resin is suitable
for resin transfer molding (RTM) process to fabricate composites. DSC results show the modified resin can be
cured at about 200℃ without adding any other curing additives. Dynamic mechanical analysis (DMA) shows the inflection
point of tanδ is 353. 4℃. Thermogravimetric analysis (TGA) showed 5% weight loss temperature of the final
cured products in nitrogen is 437. 9℃, and char yield is 73. 71% at 900℃.