New energy-absorbing materials obtained by valorisation raw materials from the polyurethane biofoam chemical recycling.

In the described studies, raw material from chemically recycled petrochemical foam and biobased polyurethane foams (100% of rapeseed oil polyol were used in polyol premix) were utilised in order to obtain viscoelastic foams. The recycled foams exhibited differ-ences in chemical structure, resulting in the formation of four different repolyols. The ob-tained repolyols were employed as replacements for 10 to 30% wt. of the petrochemical polyol in the mixture utilised to produce viscoelastic polyurethane foams. It was deter-mined that the chemical structure of the polyol utilised for the foam's initial production influences the properties of the repolyols obtained, and thus also the properties of the vis-coelastic foams obtained using them.在本项研究的相关实验中，研究人员以化学回收石化基泡沫以及生物基聚氨酯泡沫（biobased polyurethane foam，其多元醇预混料（polyol premix）中完全添加菜籽油基多元醇（rapeseed oil polyol））为原料，制备粘弹性泡沫（viscoelastic foam）。回收所得泡沫的化学结构存在差异，由此得到四种不同的再生多元醇（repolyols）。将所制备的再生多元醇以10%至30%的质量占比，替代制备粘弹性聚氨酯泡沫所用配方中的石化基多元醇（petrochemical polyol）。经研究证实，用于初始制备泡沫的多元醇的化学结构，会对所得再生多元醇的性能产生影响，进而影响使用此类再生多元醇制备的粘弹性泡沫的性能。