Abstract
This study is concerned with the analysis of relationship between the interfacial energy of polymer and the micro voids that are formed by stretching the composite polymer sheet having incompatible particles in the matrix. We tried to simulate the void formation, considering the interfacial delamination between Poly (ethylene terephthalate) (PET) and dispersed incompatible polymers, and to compare the numerical results by finite element method (FEM) with experimental ones. Decreasing the critical stress of delamination coincided with increasing the surface energy theoretically. Interfacial tension obtained from this experiment was related to critical stress calculated from the numerical analysis in void formation qualitatively.
