Role of Rubber Particle Cavitation on the PA Matrix Toughening

2 Role of Rubber Particle Cavitation on the PA Matrix Toughening 

In the first attemped quantitative model proposed by Lazzeri and Bucknall [52], it was predicted that only particles 0.25 p diameter were capable of cavitating imder a given set of conditions, lending some support to the concept that there is an optimum rubber particle size for the toughening. They also showed that cavitated rabber particles can initiate crazes and dilatational bands in the matrix. They propose that the sudden conversion of rubber particles into the mechanical equivalent of voids (by cavitation) has the indirect effect of accelerating the volume expansion in the matrix through the formation of dilatational shear bands. 

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