Boron nitride nanotubes (BNNT) exhibit exceptional mechanical properties at higher temperatures, electrical insulation, and radiation shielding . BNNTs have recently been shown to be an excellent reinforcement in nanocomposite materials . However, to efficiently and effectively fabricate high-performance BNNT-reinforced polymer matrix composites (PMCs), a thorough understanding of the BNNT/polymer interfacial interaction is needed.