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As above, the fracture behavior of PVC/MBS blends was classified and analyzed, with the following results: Up to a MBS particle size of 2000 [Angstrom], the Izod impact strength increases with particle size, and crazing is the main and energy-absorbing mode.
Owing to these specific intermolecular interactions, the activation volume of the PS/PPO blends increases, thus favoring shear yielding at high PPO content, which requires large flow volume rather than crazing.
The authors observed that the crazing process was dependent upon diffusion of the solvent into the strained bulk of the polymer.
For ABS, it is well known that the deformation mechanisms include crazing (33), (34), shear yielding (35), cavitation of rubber particles, and the induced yielding in matrix (36).
While all fracture surfaces from the tests reported in Table 3 showed evidence of crazing and crack initiation, it should be noted that the final separation of the pipe wall occurred by yielding, drawing, and rupture [2].
The deformation behavior was found to consist of both shearing and crazing in which the shear mechanisms prevailed on the surface while crazing was active in the interior.
w] and SCB content as PE100, it did not exhibit a transition from crazing to shear deformation as did PE100.
Crazing has been categorized as a viscoelastic deformation process like creep and stress relaxation involving multiple localized deformation sites instead of bulk deformation.
To date, the effect of crazing on the mechanical properties of polycarbonate has been difficult to quantify since no standardized technique exists to quantify craze severity.
In this paper, based on the model of crazing with the presence of damage at a crack tip for polymers [12, 13], time-dependence of both craze-tip advance and thickening profile at the crack tip under creep is considered.
Results will be used to support the development of models to predict stress-induced crazing in these structures.