Beverte Ilze, Cabulis Ugis, Andersons Janis, Kirpluks Mikelis, Skruls Vilis, Cabulis Peteris
Institute for Mechanics of Materials, University of Latvia, 3 Jelgavas St., LV-1004 Riga, Latvia.
Latvian State Institute of Wood Chemistry, 27 Dzerbenes St., LV-1006 Riga, Latvia.
Polymers (Basel). 2023 Jul 28;15(15):3228. doi: 10.3390/polym15153228.
The characteristics of rigid, nanoclay-filled, medium-density NEOpolyol-380 polyurethane foams components can be estimated when two conditions are met: (1) the foam blocks are produced in a sealed mould; and (2) the mass of the reacting mixture is kept constant. It was shown that, with an increase in filler concentration, the total mass of the filled polymeric network stays constant, but the total volume reduces; the higher the ratio of density of the exfoliated nanoclay platelets and polymer, the higher the volume reduction of the polymeric network. Experimental data of polyurethane foam block mass were acquired at concentrations η = 0%, 0.25%, 0.5%, 1%, 2%, 3% and 5% from the mass of a filled reacting mixture. Foam-density dependence in the uniform zone and in the side-sections of the produced blocks on the: (1) mass of the blocks; and (2) the concentration of the filler was analysed. The study demonstrated that the correlation of the specimens' density with the foam block mass is much higher than that of the filler concentration.
当满足两个条件时，可估算出刚性、纳米粘土填充的中密度NEOpolyol - 380聚氨酯泡沫组件的特性：（1）泡沫块在密封模具中生产；（2）反应混合物的质量保持恒定。结果表明，随着填料浓度的增加，填充聚合物网络的总质量保持不变，但总体积减小；剥落的纳米粘土薄片与聚合物的密度比越高，聚合物网络的体积减小幅度越大。从填充反应混合物的质量中获取了浓度η = 0%、0.25%、0.5%、1%、2%、3%和5%时聚氨酯泡沫块质量的实验数据。分析了所生产块体的均匀区域和侧截面中泡沫密度与以下因素的关系：（1）块体质量；（2）填料浓度。研究表明，试样密度与泡沫块质量的相关性远高于与填料浓度的相关性。
