کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5185023 1381064 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photocontrolled microphase separation in a nematic liquid-crystalline diblock copolymer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Photocontrolled microphase separation in a nematic liquid-crystalline diblock copolymer
چکیده انگلیسی

Using a bromo-terminated poly(ethylene oxide) as a macroinitiator, an amphiphilic liquid-crystalline (LC) diblock copolymer with an azobenzene moiety as a nematic mesogen was prepared by an atom transfer radical polymerization process. In thin films of the well-defined diblock copolymer with the mesogenic block as a continuous phase upon microphase separation, the influence of supramolecular cooperative motion on the microphase-separated nanocylinders was systematically studied. Although the major phase of the hydrophobic nematic LC block showed only one-dimensional order, it could endow the separated minor phase of the hydrophilic PEO nanocylinders with three-dimensionally ordered structures. Both out-of-plane perpendicular and in-plane parallel patternings of the regularly ordered nanocylinder arrays were successfully fabricated on macroscopic scales by thermal annealing and photoalignment, respectively. The microphase-separated nanostructures with high regularity showed excellent reproducibility and mass production, which might guarantee nanotemplated fabrication processes and would lead to novel industrial applications in macromolecular engineering.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 52, Issue 7, 23 March 2011, Pages 1554-1561
نویسندگان
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