Morphological Control and Switchable Interaction between Miktoarm Terpolymers

基于上一个资金时期的工作，提出了不同的模型系统，该系统将允许通过使用不同的切换序列来控制聚合物聚集体的形态。我们讨论了三元混合臂星形聚合物、两嵌段共聚物和混合体系(如具有双嵌段臂的混合体系)的优点和缺点，以控制分散和凝胶状态下的形态。我们建议将热敏成分和带电成分结合在一起，它们可以通过热刺激或(中间)聚电解质络合而变得不溶。因此，由于部分聚合物已经在热溶液中预聚，因此在冷条件下通过聚电解质间络合获得的胶束结构必须与在热条件下获得的不同。这将通过使用例如聚环氧丙烷作为热响应性共聚部分来实现。由于前胶束的内部模板效应，这些结构将在寒冷中保持不变，从而允许生成具有预定结构的非平衡聚集体。重点研究了胶束的时间演化及其向平衡胶束的重排。以(多孔)界面的凝胶样品为例，说明了它们作为电化学孔径切换智能涂层的应用。

Based on the work of the last funding period, different model systems are suggested, which would allow a morphology control of polymer aggregates by use of different switching sequences. We address the benefits and drawbacks of ternary miktoarm star polymers along with diblock copolymers and mixed systems (like miktoarm stars with diblock arms) in order to control the morphology both in dispersion and in the gel state. We suggest a combination of thermosensitive components and charged components, which can become insoluble either by thermal stimulus or by (inter)polyelectrolyte complexation. In consequence, the micellar structures obtained by (inter)polyelectrolyte complexation in the cold must be different to the ones obtained in the heat, as parts of the polymers already preaggregate in the hot solutions. This will be achieved by use of e.g. poly(propylene oxide) as a thermoresponsive copolymer part. These structures are to be conserved in the cold, allowing the generation of non-equilibrium aggregates with a predefined structure due to the internal templating effect of the premicelles. Special focus is laid on the temporal evolution and their rearrangements towards equilibrium micelles. In case of gelled samples at (porous) interfaces, their use as smart coatings for electrochemical switching of pore size is illustrated.