The preferential surface segregation of one component of a polymer blend has been used for the controlled modification of the surface properties. Unlike other modification methods, this technique is simple and does not require any complex modeling or additional processing steps for surface modification. Most surface segregation studies are based on the interaction between the chain ends of the additive and bulk polymer at the surface. However, additives with cyclic topologies without chain ends have not been used. In this study, an additive platform with cyclic topology without a chain end was designed for surface modification. A series of cyclic additives were synthesized via ring-expansion cationic polymerization. X-ray photoelectron spectroscopy analysis of the cyclic polymer additive showed approximately 1.5 times higher surface segregation than the linear polymer when blended with polyurethane. In addition, the surface segregation behavior depending on the molecular weight and pendant length of the cyclic polymer additive was investigated. Moreover, the monomer, allyl vinyl ether, enabled the addition of functional groups to the cyclic additive and the addition of perfluoroalkyl pendant groups was performed, revealing a promising antifouling effect in the adsorption of a plasma protein. The high performance and versatility of the cyclic architectural polymer additives extend the scope of the surface segregation field and can replace existing biomedical coatings.

聚合物共混物的一种组分的优先表面偏析已被用于表面性质的受控改性。与其他改性方法不同，该技术很简单，不需要任何复杂的建模或额外的表面改性处理步骤。大多数表面偏析研究都是基于添加剂链端与表面本体聚合物之间的相互作用。然而，尚未使用具有无链端的环状拓扑结构的添加剂。在本研究中，设计了一种具有无链端的循环拓扑的添加剂平台，用于表面改性。通过扩环阳离子聚合合成了一系列环状添加剂。环状聚合物添加剂的 X 射线光电子能谱分析表明，与聚氨酯共混时，其表面偏析比线性聚合物高约 1.5 倍。此外，还研究了取决于环状聚合物添加剂的分子量和侧链长度的表面偏析行为。此外，单体烯丙基乙烯基醚能够在环状添加剂上添加官能团，并添加全氟烷基侧基，显示出在血浆蛋白吸附方面具有良好的防污效果。环状建​​筑聚合物添加剂的高性能和多功能性扩展了表面隔离领域的范围，可以取代现有的生物医学涂料。