Int'l Conf_2_Caractérisation mécanique, microstructurale mousses polyuréthane

For the manufacture of polyurethane foam having a certain density, we seek to control as much as possible the development of the microstructure. Therefore, the final product could exhibit the desired properties for a notable application in non-lethal projectiles. These last warheads based on these alveolar materials must be able to put out of harm's way a target without causing a perma-nent injury or a fatal outcome. The mechanical characterization was carried out by dynamic drop weight test, on a machine designed and carried out locally, the mechanical properties of polyure-thane foams are highly dependent on density, cell structure (size and shape) and percentage of open and closed cells. It may occur that the foam has a preferential orientation in the cell structure. Followed by a Raman spectroscopy analysis in order to visualize of the semi-opened cells of the cellular polymer. It appears that the cellular polymer has stubborn regular cellular structures with noticeable overlap reversibility.