Thus, the stress strain response shown in the figure is not necessarily what would be expected from an experimental tensile test of the interfacial region. However, the relevant information from the figure is the comparative response of the different systems. MD-generated stress-strain curves provide a quantitative comparison the response of different systems to discern trends and physical insight. Error! Reference source not found. shows snapshots of the three models either at the end of simulation or when one of the polymer layers completely separated. Figure includes the transverse tension results for all the polymer systems including the corresponding data for the polyimide, cyanate ester, and PEEK systems from previous studies . The stiffness, toughness, and peak strength values are normalized with respect to the results obtained from a neat flCNT-flCNT transverse tension simulation. From the comparison, BMI shows the best performance in all the three metrics. Epoxy shows the second highest stiffness and peak strength but lower toughness than benzoxazine and the fluorinated cyanate ester. From Error! Reference source not found., it is clear that separation of the polymer layer occurs much earlier in the epoxy system relative to the BMI and benzoxazine systems, resulting in the lower overall toughness.