Polymer properties are usually affected by both the chain structure and aggregate structure. This has impeded studies of the relationship between the chain structure and polymer properties. However, for surface properties, the chain structure revealed a significant influence, as the chains are simply arranged as thin layers on the surface. Hence, a controlled chain structure is important to the film surface. Herein, sequence-determined fluoropolymers were synthesized using living anionic polymerization and an epoxy-amine reaction. They had definite perfluoroalkyl chain lengths and a determined sequence distribution (i.e. statistical average distribution). Based on these well-prepared fluoropolymers, the structure–property relationship was studied in detail. This indicated that the long perfluoroalkyl chain led to a low surface tension and slight surface reconstruction; meanwhile, the sequence distribution affected the sensitivity of the structural changes and the surface reconstruction. Finally, based on molecular dynamic simulations and X-ray photoelectron spectroscopy (XPS) analysis, four assembled structural models, called cluster models, were proposed to describe the assembled behaviours of the perfluoroalkyl chains at the surface.

中文翻译：

---

研究接枝密度对序列确定的含氟聚合物薄膜表面性能的影响

聚合物性能通常受链结构和聚集体结构的影响。这阻碍了对链结构和聚合物性能之间关系的研究。然而，对于表面性质，链结构显示出显着的影响，因为链简单地作为薄层布置在表面上。因此，受控的链结构对于膜表面很重要。在此，使用活性阴离子聚合和环氧胺反应合成了序列确定的含氟聚合物。它们具有确定的全氟烷基链长度和确定的序列分布（即统计平均分布）。基于这些制备良好的含氟聚合物，详细研究了结构与性质之间的关系。这表明长的全氟烷基链导致低的表面张力和轻微的表面重构；同时，序列分布影响结构变化和表面重建的敏感性。最后，基于分子动力学模拟和X射线光电子能谱（XPS）分析，提出了四个组装的结构模型，称为簇模型，用于描述全氟烷基链在表面的组装行为。