Study on Properties of Epoxy Composites Modified by Functional Graphite Oxide and Polyurethane

Table 4

Elongation at break, tensile strength, and fracture energy of pure epoxy resin and different composites.

Sample	Elongation at break (%)	Tensile strength (MPa)	Fracture energy (J/m^2)
EP	3.28	40.13	61.51
0.5%iGO/EP	4.04	43.70	91.84
PU/EP	13.20	36.70	348.12
0.5% GO/PU/EP	12.93	40.41	381.32
0.1% iGO-PU/EP	19.10	40.84	566.72
0.5% iGO-PU/EP	20.57	48.46	701.07
1.0% iGO-PU/EP	13.10	44.69	419.28
iGO- PU/EP	26.51	40.18	247.77