Boumdouha Noureddine, Safidine Zitouni, Boudiaf Achraf
Laboratoire Génie des Matériaux, Ecole Militaire Polytechnique, Bordj El-Bahri, Algeria.
Laboratoire de Chimie Macromoléculaire, Ecole militaire Polytechnique, Bordj El-Bahri, Algeria.
Turk J Chem. 2022 Feb 23;46(3):814-834. doi: 10.55730/1300-0527.3371. eCollection 2022.
Polyurethane foams have good shock-absorbing properties. This article discusses the study of the physical, dynamic analysis, and microstructure of filled polyurethane foams (PUR). We used mineral fillings nanoparticles of titanium dioxide (TiO) and calcium carbonate (C1) to support and strengthen the foam cell structure to develop shock absorption and thermal resistance properties. Dynamic mechanical analysis (DMA) and compression tests compared the mechanic characterization results with different modelling approaches. For studies of physicochemical properties, we used differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). We deduced the flame retardancy mechanism. It appears that a detailed description of the characteristics of viscosity and yield stress must take into consideration the filler's size in comparison to the cell wall's size. The effect of size distribution on the foam's microstructure was given by scanning electron microscopy (SEM). Half-open spherical cells were shown to be reduced in size with filling. The filler diffusion in polyurethane foams was used to model the composite foam. We observed that crystalline filler particles were uniformly distributed in the matrix, indicating that the total size is related to the density and is a crucial metric for the level of reinforcement.
聚氨酯泡沫具有良好的减震性能。本文讨论了填充聚氨酯泡沫（PUR）的物理、动态分析和微观结构的研究。我们使用二氧化钛（TiO）和碳酸钙（C1）的矿物填充纳米颗粒来支撑和强化泡沫孔结构，以开发减震和耐热性能。动态力学分析（DMA）和压缩试验将力学表征结果与不同的建模方法进行了比较。对于物理化学性质的研究，我们使用了差示扫描量热法（DSC）和热重分析（TGA）。我们推导了阻燃机理。似乎在描述粘度和屈服应力特性时，必须考虑填料尺寸与泡孔壁尺寸的比较。通过扫描电子显微镜（SEM）给出了尺寸分布对泡沫微观结构的影响。结果表明，填充后半开放球形孔尺寸减小。利用填料在聚氨酯泡沫中的扩散对复合泡沫进行建模。我们观察到结晶填料颗粒均匀分布在基体中，这表明总尺寸与密度有关，是增强水平的关键指标。
