Water-soluble top coats for orientation control of liquid crystal-containing block copolymer films

He Lou Xie; Xiao Li; Hyo Seon Suh; Jia Xing Ren; Ling Shu Wan; Gordon S.W. Craig; Christopher G. Arges; Paul F. Nealey

doi:10.1002/polb.24420

Water-soluble top coats for orientation control of liquid crystal-containing block copolymer films

He Lou Xie, Xiao Li, Hyo Seon Suh, Jia Xing Ren, Ling Shu Wan, Gordon S.W. Craig, Christopher G. Arges, Paul F. Nealey

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

An easily removable, water-soluble top coat of polyvinylpyrrolidone (PVP) is used to control the orientation of microdomains in a liquid crystalline block copolymer (LC BCP, poly(ethylene oxide)-block-poly(6-(4-methoxy-azobenzene-4′-butyl) hexyl methacrylate)). The corresponding LC homopolymer is also investigated for comparison. Atomic force microscopy is used to determine the orientation of the cylindrical microdomains of the LC BCP. UV–vis spectroscopy and grazing incidence wide-angle X-ray scattering are used to determine the orientation of the LC mesogens in the LC homopolymer and the LC BCP films annealed both with and without a top coat. Once the LC BCP morphology is self-assembled, the PVP top coat layer can be easily removed with water or alcohol. The facile removal of the top coat improves the processability of BCPs in technological applications, and enables direct investigation of the BCP morphology in scientific studies.

Original language	English (US)
Pages (from-to)	1569-1574
Number of pages	6
Journal	Journal of Polymer Science, Part B: Polymer Physics
Volume	55
Issue number	21
DOIs	https://doi.org/10.1002/polb.24420
State	Published - Nov 1 2017

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Physical and Theoretical Chemistry
Polymers and Plastics
Materials Chemistry

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title = "Water-soluble top coats for orientation control of liquid crystal-containing block copolymer films",

abstract = "An easily removable, water-soluble top coat of polyvinylpyrrolidone (PVP) is used to control the orientation of microdomains in a liquid crystalline block copolymer (LC BCP, poly(ethylene oxide)-block-poly(6-(4-methoxy-azobenzene-4′-butyl) hexyl methacrylate)). The corresponding LC homopolymer is also investigated for comparison. Atomic force microscopy is used to determine the orientation of the cylindrical microdomains of the LC BCP. UV–vis spectroscopy and grazing incidence wide-angle X-ray scattering are used to determine the orientation of the LC mesogens in the LC homopolymer and the LC BCP films annealed both with and without a top coat. Once the LC BCP morphology is self-assembled, the PVP top coat layer can be easily removed with water or alcohol. The facile removal of the top coat improves the processability of BCPs in technological applications, and enables direct investigation of the BCP morphology in scientific studies.",

author = "Xie, {He Lou} and Xiao Li and Suh, {Hyo Seon} and Ren, {Jia Xing} and Wan, {Ling Shu} and Craig, {Gordon S.W.} and Arges, {Christopher G.} and Nealey, {Paul F.}",

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doi = "10.1002/polb.24420",

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T1 - Water-soluble top coats for orientation control of liquid crystal-containing block copolymer films

AU - Xie, He Lou

AU - Li, Xiao

AU - Suh, Hyo Seon

AU - Ren, Jia Xing

AU - Wan, Ling Shu

AU - Craig, Gordon S.W.

AU - Arges, Christopher G.

AU - Nealey, Paul F.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - An easily removable, water-soluble top coat of polyvinylpyrrolidone (PVP) is used to control the orientation of microdomains in a liquid crystalline block copolymer (LC BCP, poly(ethylene oxide)-block-poly(6-(4-methoxy-azobenzene-4′-butyl) hexyl methacrylate)). The corresponding LC homopolymer is also investigated for comparison. Atomic force microscopy is used to determine the orientation of the cylindrical microdomains of the LC BCP. UV–vis spectroscopy and grazing incidence wide-angle X-ray scattering are used to determine the orientation of the LC mesogens in the LC homopolymer and the LC BCP films annealed both with and without a top coat. Once the LC BCP morphology is self-assembled, the PVP top coat layer can be easily removed with water or alcohol. The facile removal of the top coat improves the processability of BCPs in technological applications, and enables direct investigation of the BCP morphology in scientific studies.

AB - An easily removable, water-soluble top coat of polyvinylpyrrolidone (PVP) is used to control the orientation of microdomains in a liquid crystalline block copolymer (LC BCP, poly(ethylene oxide)-block-poly(6-(4-methoxy-azobenzene-4′-butyl) hexyl methacrylate)). The corresponding LC homopolymer is also investigated for comparison. Atomic force microscopy is used to determine the orientation of the cylindrical microdomains of the LC BCP. UV–vis spectroscopy and grazing incidence wide-angle X-ray scattering are used to determine the orientation of the LC mesogens in the LC homopolymer and the LC BCP films annealed both with and without a top coat. Once the LC BCP morphology is self-assembled, the PVP top coat layer can be easily removed with water or alcohol. The facile removal of the top coat improves the processability of BCPs in technological applications, and enables direct investigation of the BCP morphology in scientific studies.

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AN - SCOPUS:85027517320

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JO - Journal of Polymer Science, Part B: Polymer Physics

JF - Journal of Polymer Science, Part B: Polymer Physics

IS - 21

ER -

Water-soluble top coats for orientation control of liquid crystal-containing block copolymer films

Abstract

All Science Journal Classification (ASJC) codes

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