Figure 4
From: Co-continuous network polymers using epoxy monolith for the design of tough materials
Mechanical properties and X-ray CT and SEM images of the CNPs filled with thiol–ene thermosets and polyacrylates. (a) Stress–strain curves of the CNPs filled with thiol–ene thermosets. See Fig. 1b for the chemical structure of the polyfunctional thiols and acrylates. (b) Stress–strain curves of the CNPs filled with polyacrylates. (c) Stress–strain curves of the monolith sheet (M120G) filled with PEG200, ethylene glycol, and toluene as the liquid materials for the second component. (d) X-ray CT images of CNP-P6/A1-10 and CNP-P6/A1-20. Cross-section images are reconstructed in the horizontal direction for the area near the bottom surface of the CNPs. The X-ray CT images were analyzed by the phase contrast imaging (PCI) method (ref.50) and they are represented for each component, i.e., the polyacrylate, the epoxy, and the void corresponding to the light gray, dark grey, and black areas in the left cross-section images. (e) SEM images of the fracture surfaces of CNP-P6/A1-20 and CNP-P6/A1/GA-15/5 after the tensile test. (f) Hysteresis stress–strain curves of the monolith sheet (M120G, left), CNP-P6/A1-20 (center), and CNP-E2 (right). The maximum applied forces were 20, 30, and 40 N, respectively.
