可膨胀石墨阻燃高回弹聚氨酯泡沫塑料的性能

在原料中添加可膨胀石墨（EG），采用一步法合成了阻燃型高回弹聚氨酯软泡，研究了EG对泡沫性能的影响。用扫描电镜和光学显微镜观察了EG粒子在泡沫内的固着状态及其对泡孔形貌和泡沫燃烧后的炭层形貌的影响。垂直水平燃烧实验和极限氧指数实验检测了EG的添加量对于泡沫燃烧的抑制情况。考察了EG粒子的含量对泡沫密度、拉伸及压缩力学性能的影响，以及EG对泡沫热降解的影响规律。研究结果表明：增大EG用量可以有效抑制熔滴并使阻燃性能得到改善，但添加过多的EG会导致泡孔变形及力学性能恶化。

Flame Retardant High Resilience Flexible Polyurethane Foam Filled with Expandable Graphite

Expandable graphite(EG) was added to polyurethane to form flame retardant high resilience flexible polyurethane foam in one step. Effects of EG on flexible polyurethane foam were studied. The fixation state of EG particles in the bubble and its effect on cell morphology and the burned layer of poly urethane foam were observed by means of scanning electron microscopy and optical microscopy. The effect of different EG contents on the inhibition of foam combustion were studied with vertical horizontal burning test and LOI experiments. The density, tensile mechanical properties and compressive mechanical properties of foams with different EG contents were examined. Effects of EG on PUF were examined by thermogravimetric analysis. Results show that the increasing of the amount of EG can inhibit the droplet formation during burning and improve flame retardant property. However, adding too much of EG leads to deformation of cells and deterioration of mechanical properties.