Study foam combustion performance

The specific expression is that the oxygen index increases with higher density, meaning that porous materials with a greater degree of densification are less likely to ignite. The duration of combustion remains largely unaffected by the level of density, which explains the long-lasting and stable combustion behavior observed in multi-porous materials. The relationship between density and combustion characteristics is moderate; as density increases, both the range of combustion phenomena and the mass loss decrease. Additionally, the combustion speed appears to slow down more significantly, indicating that flames spread more quickly through low-density multi-porous materials. The effect of varying density on the performance of foam body combustion is significant. For example, in polyurethane foam, which is a low-density porous material, the presence of numerous small, fibrous cells increases the surface area in contact with air. This increased exposure makes the material more prone to combustion. Therefore, when developing flame-retardant multi-porous materials, it is crucial to take into account the impact of densification. If the density increases and reduces flame resistance, additional flame retardants must be added to compensate. According to the findings of Zhu Guoqiang and his team, the degree of densification has a substantial influence on the combustion behavior of multi-porous materials. Understanding this relationship is essential for optimizing material design and improving fire safety performance. By carefully adjusting the density and incorporating appropriate flame retardants, engineers can achieve better control over combustion characteristics and enhance the overall safety of these materials.