Study on high energy absorption of spontaneous closed cell polyacrylate foam

Abstract

AbstractTo solve the problem of poor waterproof and moisture resistance caused by the high open‐cell ratio of polyacrylate foam, a special foam stabilizer (MMA‐g‐SI) for acrylate was synthesized with polyacrylate as the main chain and aminosiloxane as the side chain. MMA‐g‐SI has good foam stability in the process of acrylate foaming, and can significantly reduce the surface tension and further increase the closed‐cell content. When the amount of MMA‐g‐SI was 1.0 wt%, the water absorption of foam decreased from 64.3% to 2.1%. The point impact energy absorption increased from 50% to 72%, and the surface impact energy absorption increased from 28% to 35%. Moreover, with the increase of density, the point impact energy absorption of the foam increased, while the surface impact energy absorption decreased. The special foam stabilizer has a good application prospect in the field of acrylate foaming.