基于生物柴油副产物粗甘油的聚氨酯硬泡的制备

摘要

A new kind of glycerol-based polyol was synthesized via a thermochemical conversion process with crude glycerol as raw material,and the rigid polyurethane foams(RPUFs)could prepared by using the glycerol-based polyol. The influence of the glycerol-based polyol contents on the properties of the prepared RPUFs was fur-ther investigated. The results showed that,when using the self-made catalyst,the polyol with the hydroxyl number 244 mgKOH/g,acid number 1.0 mgKOH/g and viscosity 600 mPa·s was synthesized at the optimum conditions of 200 ℃ and 7 h. When petroleum based polyether polyol was replaced by 25% of the glycerol-based polyol, the RPUF had similar properties as the control sample.%以粗甘油为原料,通过热化学转化合成一种甘油基多元醇,将其用于硬质聚氨酯泡沫塑料的制备,并考察了甘油基多元醇含量对聚氨酯泡沫性能的影响.研究表明,在采用自制催化剂、200℃反应7 h的优化条件下,可制得羟值244 mgKOH/g、酸值1.0 mgKOH/g、黏度600 mPa·s的甘油基多元醇.甘油基多元醇替代25%(质量分数)石油基聚醚多元醇时,得到的聚氨酯硬泡与对照的硬泡性能相近.