Abstract
Crystalline polymers may show different deformation responses depending on size of crystalline phase with respect to that of specimen. In the previous report, experimental stress-strain curves are numerically reproduced by the molecular chain plasticity FE analysis using a unit cell with hexagonal crystalline phases. However, there are some problems that the shape of crystalline phase in the unit cell is not always 6-fold symmetrical in the actual two-dimensional cross section of PP and the effect of the shape heterogeneity of crystalline phases on deformation responses has not been clarified. In the present report, the authors change the shape of some crystalline phase in the unit cell from hexagon to square and attempt to conduct the molecular chain plasticity FE analysis for amorphous phase and crystal plasticity FE analysis for crystalline one. Furthermore, the effect of shape heterogeneity of crystalline phases on deformation responses is investigated by comparing the results for unit cells with different heterogeneity.
