Abstract:We experimentally demonstrate a strategy to design the microstructure and hence viscoelastic behavior of polyurethane (PU) foams. PU foams are fabricated at two temperatures (room and À5 C) and reinforced with varying concentrations of oxidized carbon nanotubes (CNTs). Hierarchical pores, thicker cell walls, higher density, and low porosity are recorded in PU foams processed at À5 C. The addition of CNTs improves the cell wall stiffness and thermal stability of PU foams. Master curves constructed from dynamic … Show more
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