作者：Cai-Li YU, Fa-Ai ZHANG, Xing-Hua ZHU
關(guān)鍵字：emulsion polymerization, kinetics, nano-SiO2, hydroxyl methacrylate
論文來源：期刊
具體來源：Polym. Adv. Technol. 2009, 20 347–350
發(fā)表時間：2009年
Kinetic of acrylic emulsion polymerization containing hydrophilic hydroxyethyl methacrylate (HEMA) and acrylic acid (AA) in the presence of nano-SiO2 was investigated. The influence of temperature, emulsifier level, hydroxyl monomer content and the level of nano-SiO2 on monomer conversion, polymerization rate (Rp) and the particle size was investigated. The results showed that the presence of nano-SiO2 increased the Rp when the level was below 5% but decreased when the level was above 7.5%, the more levels, the more seriously. As the temperature and emulsifier levels increased, and the presence of hydroxyl monomer, the Rp increased. The active energy of the system was 142.01kJ/mol and the relationship of Rp and the concentration of emulsifier (E) was Rp∝[E]0.38. The mean particle size increased, particle size distribution became broader as the increase of nano-SiO2 levels.