Investigation of the interphase structure in polyamide 6–matrix, multi-scale composites

In this study, we investigated the dispersion of carbon nanotubes and interphases formed around them in nanocomposites with a polyamide 6 matrix (with nanotube reinforcement) hybrid composites same matrix, reinforced fibers. Small-angle neutron scattering (SANS) experiments showed that fibers effectively increased nanotubes. The average size aggregates were significantly smaller, but reinforcement–matrix interface area was larger than nanocomposites. Nanotube had significant effect on crystalline structure; X-ray diffraction patterns composites, crystallites grew epitaxially surface well-dispersed nanotubes, which resulted decreased crystallite size. smaller inferred rigid amorphous fraction matrix. interphase also led to better mechanical performance.