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合成了聚氨酯(PU)和聚乙烯基酯(PVE)为基的全水发泡聚合物互穿网络(IPNs)软质泡沫。各配方泡沫的聚氨酯对聚乙烯基路的比例和/或水量各不相同,在同等水量和相同密度的两组泡沫中,PU/PVE=90/10的泡沫均呈现拉伸强大最高值。随乙烯基酯含量的增加,所有泡沫的落球回弹降低,同时压缩滞后增加。这种能量吸收能力的提高也反映在动态力学谱上,即聚氨酯软段和聚乙烯基酯的玻璃化温度间的高阻尼区明显变宽。聚氨酯软段Tg的显著移高表明,聚氨酯软段和聚乙烯基酯链段发生了相当程度的相互穿。
An all-water foamed polymer interpenetrating network (IPNs) flexible foam based on polyurethane (PU) and polyvinyl ester (PVE) was synthesized. Polyurethane profiles and / or water volumes vary from polyurethane foam to formula foam, and foam of PU / PVE = 90/10 exhibits the highest tensile strength for both foam sets of equal volume and density. With the increase of vinyl ester content, the rebound of all foam drops falling while the compression lag increased. This increase in energy absorption is also reflected in the dynamic mechanical spectrum, that is, the high damping area between the glass transition temperature of the polyurethane soft segment and the polyvinyl ester significantly widens. A significant increase in the Tg of the polyurethane soft segment indicates that a significant degree of interpenetration of the polyurethane soft segment and the polyvinyl ester segment occurs.