研究了超临界CO2 中降压时间以及小分子的溶度参数、亲电性和芳香性等因素对聚氨酯吸附小分子的影响,考察了小分子比蒸发速率对小分子在聚氨酯中解吸的影响.结果表明聚氨酯易于吸附亲电性试剂和多数芳香族小分子.通常比蒸发速率大的小分子在聚氨酯中解吸也快 The effects of pressure-reducing time, solubility parameters of small molecules, electrophilicity and aromaticity on the adsorption of small molecules in polyurethane were studied. The effect of small molecule specific evaporation rate on the desorption of small molecules in polyurethane was also investigated. The results show that polyurethanes tend to adsorb electrophiles and most aromatic small molecules, which are usually desorbed faster than small molecules with high evaporation rate in polyurethane