用反相乳液聚合法直接制备含聚丙烯酸锂粒子的电流变液  

Direct Preparation of Electrorheological Fluid Containing Poly (Lithium Acrylate)Particles via Inverse Emulsion Polymerization

作　　者：田大听[1] 官建国[2] 过俊石[1] 谢洪泉[1] 

机构地区：[1]华中理工大学化学系,武汉430074 [2]武汉工业大学新材料研究所

出　　处：《材料导报》1997年第6期42-45,共4页Materials Reports

基　　金：国家自然科学基金

摘　　要：用反相乳液聚合法直接合成含聚丙烯酸锂粒子的电流变(ER)液。研究了水分、交联剂、稳定剂及中和度等条件对ER液的屈服应力及漏电流密度的影响,并用粒子极化理论对实验结果作了相应的解释。研究了丙三醇代替水作为活化剂的效果。还用反相乳液核壳聚合直接合成了含核壳型聚丙烯酸锂粒子的ER液,比较了二种单体进行壳层聚合的效果,指出聚丙烯酰胺作为壳层有良好的作用。Inverse emulsion polymerization of lithium acrylate was studied in order to obtain electrorheological (ER) fluid directly. The effects of polymerization conditions,such as wa-ter content,neutralization degree,amounts of crosslinking agent and stabilizer etc,on the proper-ties of ER fluid were investigated. It was shown that glycerol could be used as activator and the thermostability of ER fluid was improved. The ER behavior of the fluid containing poly (lithium acrylate) particles was improved further by core-shell type polymerization of inverse emulsion with poly(lithium acrylate)as core and polyacrylamide as shell.

关 键 词：反相乳液聚合 聚丙烯酸锂 电流变液 

分 类 号：O632.51[理学—高分子化学] O631.21[理学—化学]