Mechanical and dielectric properties of microcellular polycarbonate foams with unimodal or bimodal cell-size distributions:

摘要: This article reports on the compressive, dynamic mechanical and dielectric properties of microcellular polycarbonate foams with unimodal or bimodal cell-size distributions fabricated using environment-friendly supercritical carbon dioxide. The effects cell morphologies such as relative density, distribution porosity compressive strength, Young’s modulus, storage loss constant tangent are investigated quantitatively. Experimental values strength modulus fit very well theoretical calculated from Gibson–Ashby model at low densities. higher density leads to modulus. significantly improve compared same density. depend only total porosity, bu...