Study on high energy absorption of spontaneous closed cell polyacrylate foam

To 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. KEYWORDS energy absorption, foam stabilizer, polyacrylate, poor waterproof, surface tension
1 | INTRODUCTION With the development of technology, electronic devices, such as mobile phones and computers, have become a part of people's life. However, the screens of these electronic devices [...]