The Effects of SiO<sub>2</sub>/PEG Suspension on Mechanical Properties of Rigid Polyurethane Foams

作者：Xin Feng, Shu Kui Li, Yan Wang, Ying Chun Wang, Jin Xu Liu · 发表于：Advanced materials research · 年份：2013 · DOI：10.4028/www.scientific.net/amr.815.246 · 被引用次数：5 · 研究领域：Polymer composites and self-healing、Polymer Nanocomposites and Properties、Silicone and Siloxane Chemistry

In order to improve the mechanical properties of the polyurethane foams, the silica nanoparticles were added into the foams in the form of SiO 2 /PEG suspension during the preparation process. The microstructure, density, static mechanical properties and dynamic mechanical properties of the foams were investigated. Microstructure analysis shows that the silica nanoparticles were uniformly dispersed in the foams, however when the amounts of SiO 2 /PEG suspension is more than 2.5 wt.%, cracks in the skelecton were observed in foams. With the increased SiO 2 /PEG suspension, the density, static compression strength and dynamic compression strength show an increasing tendency. When the SiO 2 /PEG suspension is 2.5 wt.%, the density of the foams increased 4.17 %, while the static compression strength increased 26 %. When the SiO 2 /PEG suspension is 10 wt.%, the density of the foams increased 16 %, while the dynamic compression strength increased 60.5 %. The corresponding mechanism was discussed in the paper.