【摘要】 为提高聚丙烯酸酯乳液的性能 ,采用共混和原位乳液聚合两种方法制备了氟乳液改性的聚丙烯酸酯乳液。探讨了引发剂加入方式 ,乳化剂种类 ,氟乳液含量对反应体系的稳定性 ,单体转化率以及胶膜玻璃化转变温度的影响。测定并对比了改性后两种胶膜的吸水率和涂膜硬度。结果表明 :共混改性乳液当氟乳液质量分数较大时 ,胶膜的耐水性和硬度有明显的提高 ,而用原位乳液聚合法改性在氟乳液加入量很少的情况下胶膜的性能就有明显的提高。更多还原

【Abstract】 Two kinds of polyacrylate emulsions modified with fluorine containing emulsion were prepared by the emulsion mixing method (Ⅰ) and in situ emulsion polymerization (Ⅱ) to improve polyacrylate emulsion properties. The analysis investigates the effects of initiator feeding methods, the kinds of emulsifer and the amount of fluorine containing emulsion on the stability of the reaction system, monomer conversation and the glass transition temperature of the emulsion films. The water absorption and the hardness of two emulsion films were measured. The results indicate that (1) there is an obvious improvement on the hardness and water absorption of the film based on the mixed emulsion only at high fluorine content in the fluorine containing emulsion, and (2) the improvement was quite high even for low fluorine content in the fluorine containing emulsion using method Ⅱ.更多还原