Houillot Lisa, Nicolas Julien, Save Maud, Charleux Bernadette, Li Yuting, Armes Steven P
Laboratoire de Chimie des Polymères, CNRS UMR 7610, Université Pierre et Marie Curie, Case 185, 75252 Paris Cedex 05, France.
Langmuir. 2005 Jul 19;21(15):6726-33. doi: 10.1021/la050495b.
The miniemulsion polymerization of styrene has been carried out using two pH-responsive cationic diblock macromonomers as reactive stabilizers. As a comparison, the analogous nonpolymerizable cationic diblock copolymer was also investigated. Each of these three stabilizers based on 2-(diethylaminoethyl)methacrylate and quaternized 2-(dimethylaminoethyl)methacrylate residues were prepared via oxyanionic polymerization and had relatively low polydispersities. It was found that all three copolymers were grafted to the polystyrene latex particles, as judged by X-ray photoelectron spectroscopy, aqueous electrophoresis and FTIR spectroscopy studies. Kinetics studies and colloidal characteristics indicated poorer stabilization properties of the partially quaternized diblock macromonomer and electron microscopy confirmed that the latexes invariably had relatively broad particle size distributions.
使用两种pH响应性阳离子二嵌段大分子单体作为反应性稳定剂进行了苯乙烯的细乳液聚合。作为对比，还研究了类似的不可聚合阳离子二嵌段共聚物。这三种基于甲基丙烯酸2-(二乙氨基乙基)酯和季铵化甲基丙烯酸2-(二甲氨基乙基)酯残基的稳定剂均通过氧阴离子聚合制备，且具有相对较低的多分散性。通过X射线光电子能谱、水性电泳和傅里叶变换红外光谱研究判断，发现所有三种共聚物均接枝到聚苯乙烯胶乳颗粒上。动力学研究和胶体特性表明部分季铵化二嵌段大分子单体的稳定性能较差，电子显微镜证实胶乳始终具有相对较宽的粒径分布。
