Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan.
Nagoya University Venture Business Laboratory, Furo-cho, Chikusa, Nagoya, 464-8603, Japan.
Angew Chem Int Ed Engl. 2016 Nov 2;55(45):14028-14032. doi: 10.1002/anie.201607786. Epub 2016 Oct 11.
High-density polymer brushes on substrates exhibit unique properties and functions stemming from the extended conformations due to the surface constraint. To date, such chain organizations have been mostly attained by synthetic strategies of surface-initiated living polymerization. We show herein a new method to prepare a high-density polymer brush architecture using surface segregation and self-assembly of diblock copolymers containing a side-chain liquid-crystalline polymer (SCLCP). The surface segregation is attained from a film of an amorphous base polymer (polystyrene, PS) containing a minor amount of a SCLCP-PS diblock copolymer upon annealing above the glass-transition temperature. The polystyrene portion of the diblock copolymer can work as a laterally mobile anchor for the favorable self-assembly on the polystyrene base film.
在基底上的高密度聚合物刷表现出独特的性质和功能，这源于由于表面约束而导致的扩展构象。迄今为止，这种链组织主要通过表面引发的活性聚合的合成策略来获得。本文展示了一种使用含有侧链液晶聚合物（SCLCP）的嵌段共聚物的表面选择性和自组装来制备高密度聚合物刷结构的新方法。表面选择性是通过在高于玻璃化转变温度退火含有少量 SCLCP-PS 嵌段共聚物的无定形基底聚合物（聚苯乙烯，PS）的膜来实现的。嵌段共聚物的聚苯乙烯部分可以作为有利的自组装在聚苯乙烯基底膜上的横向可移动锚。
