Effect of rubber particle size on impact tensile fracture behavior of MBS resin

The single-edge-cracked specimens of MBS resin with two different sizes of rubber particles were fractured under impact tensile loading. The dynamic load and displacement were measured using a piezo sensor and a high-speed extensometer, respectively. The load and displacement diagram, i.e. the external work Uex applied to the specimen was used to determine the elastic energy Ee and the fracture energy Ef for creating a new fracture surface As. Energy release rate was then estimated using Gf = Ef/As. The values of Gf were correlated with the fracture loads and the mean crack velocities determined from the load and time relationships. The effect of the particle size on the impact tensile fracture behavior was then examined. The results showed that the particle size plays an important role in changing the impact fracture behavior of MBS resin.