“…Efforts to characterize the mechanical performance of polymer foams have been made during the past years, focusing on aspects such as strength and stiffness, energy absorption, impact strength, creep behavior, and dynamic-mechanical properties, as well as the influence of foam aspects such as composition, density, and cellular structure [20,21]. Particularly, several reports have considered the mechanical characterization of microcellular ABS-based foams, focusing on specific aspects such as the effects of processing and addition of secondary phases on foam density and cellular structure morphology and, as a consequence, on the mechanical properties of the resulting microcellular foams [22,23,24]. The addition of secondary phases, especially nanometric-sized particles, has been shown to favor cell nucleation during foaming, contributing to cell size reduction and cell density enhancement, which, together with their reinforcement of the polymer phase, results in foams with enhanced stiffness, strength, and improved storage modulus [25].…”