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Ding W, Hanson J, Burghardt WR, López-Barrón CR, Robertson ML. Shear Alignment Mechanisms of Close-Packed Spheres in a Bulk ABA Triblock Copolymer. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenyue Ding
- William A. Brookshire Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Josiah Hanson
- William A. Brookshire Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Wesley R. Burghardt
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois,60208, United States
| | | | - Megan L. Robertson
- William A. Brookshire Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
- Department of Chemistry, University of Houston, Houston, Texas 77204-4004, United States
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Chen LT, Huang YT, Chen CY, Chen MZ, Chen HL. Thermodynamically Originated Stacking Fault in the Close-Packed Structure of Block Copolymer Micelles. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Ting Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yu-Ting Huang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chun-Yu Chen
- Experimental Facility Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Meng-Zhe Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsin-Lung Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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Zhang C, Vigil DL, Sun D, Bates MW, Loman T, Murphy EA, Barbon SM, Song JA, Yu B, Fredrickson GH, Whittaker AK, Hawker CJ, Bates CM. Emergence of Hexagonally Close-Packed Spheres in Linear Block Copolymer Melts. J Am Chem Soc 2021; 143:14106-14114. [PMID: 34448579 DOI: 10.1021/jacs.1c03647] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The hexagonally close-packed (HCP) sphere phase is predicted to be stable across a narrow region of linear block copolymer phase space, but the small free energy difference separating it from face-centered cubic spheres usually results in phase coexistence. Here, we report the discovery of pure HCP spheres in linear block copolymer melts with A = poly(2,2,2-trifluoroethyl acrylate) ("F") and B = poly(2-dodecyl acrylate) ("2D") or poly(4-dodecyl acrylate) ("4D"). In 4DF diblocks and F4DF triblocks, the HCP phase emerges across a substantial range of A-block volume fractions (circa fA = 0.25-0.30), and in F4DF, it forms reversibly when subjected to various processing conditions which suggests an equilibrium state. The time scale associated with forming pure HCP upon quenching from a disordered liquid is intermediate to the ordering kinetics of the Frank-Kasper σ and A15 phases. However, unlike σ and A15, HCP nucleates directly from a supercooled liquid or soft solid without proceeding through an intermediate quasicrystal. Self-consistent field theory calculations indicate the stability of HCP is intimately tied to small amounts of molar mass dispersity (Đ); for example, an HCP-forming F4DF sample with fA = 0.27 has an experimentally measured Đ = 1.04. These insights challenge the conventional wisdom that pure HCP is difficult to access in linear block copolymer melts without the use of blending or other complex processing techniques.
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Affiliation(s)
- Cheng Zhang
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Queensland, Brisbane, Queensland 4072, Australia
| | | | | | | | | | | | | | | | | | | | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Queensland, Brisbane, Queensland 4072, Australia
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Hsu NW, Nouri B, Chen LT, Chen HL. Hexagonal Close-Packed Sphere Phase of Conformationally Symmetric Block Copolymer. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01445] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Nai-Wen Hsu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Babak Nouri
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Li-Ting Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsin-Lung Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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Chen LT, Chen CY, Chen HL. FCC or HCP: The stable close-packed lattice of crystallographically equivalent spherical micelles in block copolymer/homopolymer blend. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.02.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Wang S, Xie R, Vajjala Kesava S, Gomez ED, Cochran EW, Robertson ML. Close-Packed Spherical Morphology in an ABA Triblock Copolymer Aligned with Large-Amplitude Oscillatory Shear. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00505] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shu Wang
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Renxuan Xie
- Department
of Chemical Engineering and the Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Sameer Vajjala Kesava
- Department
of Chemical Engineering and the Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Enrique D. Gomez
- Department
of Chemical Engineering and the Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Eric W. Cochran
- Department
of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Megan L. Robertson
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
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Spontaneous Enhancement of Packing Regularity of Spherical Microdomains in the Body-Centered Cubic Lattice upon Uniaxial Stretching of Elastomeric Triblock Copolymers. Polymers (Basel) 2010. [DOI: 10.3390/polym3010036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Nonomura M. Stability of the fcc structure in block copolymer systems. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:465104. [PMID: 21693838 DOI: 10.1088/0953-8984/20/46/465104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The stability of the face-centered cubic (fcc) structure in microphase separated copolymers is investigated by a coarse-grained approach. Direct simulations of the equation for the microphase separation in three dimensions indicate that there is a narrow area above a certain degree of segregation in the phase diagram, where the fcc structure is the most stable structure. By employing the mode expansion, we have confirmed that the fcc structure can form as a metastable structure even in the weak segregation regime.
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Affiliation(s)
- Makiko Nonomura
- Department of Mathematical and Life Sciences, Graduate School of Sciences, Hiroshima University, 1-3-1 Higashi-Hiroshima, 739-8526, Japan
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Progress in control of microdomain orientation in block copolymers – Efficiencies of various external fields. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.03.020] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Huang YY, Hsu JY, Chen HL, Hashimoto T. Precursor-Driven Bcc−Fcc Order−Order Transition of Sphere-Forming Block Copolymer/Homopolymer Blend. Macromolecules 2007. [DOI: 10.1021/ma070066f] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yen-Yu Huang
- Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu, 30013, Taiwan, and Advanced Science Research Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki Prefecture 319-1195, Japan
| | - Jen-Yung Hsu
- Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu, 30013, Taiwan, and Advanced Science Research Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki Prefecture 319-1195, Japan
| | - Hsin-Lung Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu, 30013, Taiwan, and Advanced Science Research Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki Prefecture 319-1195, Japan
| | - Takeji Hashimoto
- Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu, 30013, Taiwan, and Advanced Science Research Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki Prefecture 319-1195, Japan
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