Hydrogen Bond Induces Hierarchical Self‐Assembly in Liquid‐Crystalline Block Copolymers,Macromolecular Rapid Communications

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Hydrogen Bond Induces Hierarchical Self‐Assembly in Liquid‐Crystalline Block Copolymers
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-02-05 , DOI: 10.1002/marc.201700783
Shuai Huang ₁ , Linlin Pang ₂ , Yuxuan Chen ₁ , Liming Zhou ₂ , Shaoming Fang ₂ , Haifeng Yu ₁

Affiliation

Microphase‐separated structures of block copolymers (BCs) with a size of sub‐10 nm are usually obtained by hydrogen‐bond‐induced self‐assembly of BCs through doping with small molecules as functional additives. Here, fabrication of hierarchically self‐assembled sub‐10 nm structures upon microphase separation of amphiphilic liquid‐crystalline BCs (LCBCs) at the existence of hydrogen bonds but without any dopants is reported. The newly introduced urethane groups in the side chain of the hydrophobic block of LCBCs interact with the ether groups of the hydrophilic poly(ethylene oxide) (PEO) block, leading to imperfect crystallization of the PEO blocks. Both crystalline and amorphous domains coexist in the separated PEO phase, enabling a lamellar structure to appear inside the PEO nanocylinders. This provides an elegant method to fabricate controllable sub‐10 nm microstructures in well‐defined polymer systems without the introduction of any dopants.

中文翻译：

氢键导致液晶嵌段共聚物的分层自组装

小于10 nm的嵌段共聚物（BCs）的微相分离结构通常是通过掺杂小分子作为功能添加剂通过氢键诱导的BCs自组装而获得的。在此，据报道，在存在氢键但没有任何掺杂剂的情况下，两亲液晶BC（LCBC）进行微相分离时，会制造出层次自组装的亚10 nm结构。LCBCs疏水嵌段侧链中新引入的氨基甲酸酯基团与亲水性聚环氧乙烷（PEO）嵌段的醚基相互作用，导致PEO嵌段的结晶不完善。结晶域和非晶域同时存在于分离的PEO相中，从而使层状结构出现在PEO纳米圆柱体内。

更新日期：2018-02-05

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