Figure shows the stress-strain response from the transverse tension simulations for polymer mass fractions of 41% for epoxy, 36% for BMI, and 34% for benzoxazine. The selection of these polymer mass fractions was based on those of other polymer systems reported in previous work . From the figure, the epoxy and the BMI models exhibit a higher peak strength than the benzoxazine. However, the benzoxazine system displays a higher toughness which is evident from the corresponding curve not converging to the 0 MPa stress value. It is important to note that stress-strain data that is generated using all-atom MD simulations inherently includes a strain rate effect that results from the simulated deformation rates that are orders of magnitude above laboratory-observed deformation rates .