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Shi W. Role of Defects in Achieving Highly Asymmetric Lamellar Self-Assembly in Block Copolymer/Homopolymer Blends. J Phys Chem Lett 2020; 11:2724-2730. [PMID: 32203668 DOI: 10.1021/acs.jpclett.0c00459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Lamellar structure is a prominent state in soft condensed matter. Swelling lamellar layers to highly asymmetric structures by a second component is a facile, cost-effective strategy to impart materials with adaptive size and tunable properties. One key question that remains unsolved is how defects form and affect the asymmetric lamellar order. This study unravels the role of defects by swelling a miktoarm block copolymer with a homopolymer. Ordered lamellae first lose translational order by a significant increase in the number of dislocations and then lose orientational order by the generation of disclinations. The homopolymers are not uniformly distributed in defective lamellae and primarily segregate in the vicinity of disclination cores. The free energy of defects is mainly contributed by molecular splay and significantly alleviated by an increased radius of local curvature. This study provides direct evidence to reveal the role of defects and lamellar order in block copolymer/homopolymer blends and also sheds light on understanding analogous structural transitions in other soft systems, including lyotropic liquid crystals, phospholipid membranes, and polymer nanocomposites.
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Affiliation(s)
- Weichao Shi
- Key Laboratory of Functional Polymer Materials (Ministry of Education) and Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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2
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Yang S, Lei Z, Hu N, Chen EQ, Shi AC. Regulating block copolymer phases via selective homopolymers. J Chem Phys 2015; 142:124903. [PMID: 25833605 DOI: 10.1063/1.4915538] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The phase behavior of strongly segregated AB diblock copolymer and selective C homopolymer blends is examined theoretically using a combination of strong stretching theory (SST) and self-consistent field theory (SCFT). The C-homopolymer is immiscible with the B-blocks but strongly attractive with the A-blocks. The effect of homopolymer content on the order-order phase transitions is analyzed. It is observed that, for AB diblock copolymers with majority A-blocks, the addition of the C-homopolymers results in lamellar to cylindrical to spherical phase transitions because of the A/C complexation. For diblock copolymers with minor A-blocks, adding C-homopolymers leads to transitions from spherical or cylindrical morphology with A-rich core to lamellae to inverted cylindrical and spherical morphologies with B-rich core. The results from analytical SST and numerical SCFT are in good agreement within most regions of the phase diagram. But the deviation becomes more obvious when the composition of A-blocks is too small and the content of added C-homopolymers is large enough, where the SCFT predicts a narrow co-existence region between different ordered phases. Furthermore, it is found that the phase behavior of the system is insensitive to the molecular weight of C-homopolymer.
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Affiliation(s)
- Shuang Yang
- Beijing National Laboratory for Molecular Sciences, Department of Polymer Science and Engineering and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhen Lei
- Beijing National Laboratory for Molecular Sciences, Department of Polymer Science and Engineering and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Nan Hu
- Beijing National Laboratory for Molecular Sciences, Department of Polymer Science and Engineering and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Er-Qiang Chen
- Beijing National Laboratory for Molecular Sciences, Department of Polymer Science and Engineering and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - An-Chang Shi
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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3
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Sunday DF, Kline RJ. Reducing Block Copolymer Interfacial Widths through Polymer Additives. Macromolecules 2015. [DOI: 10.1021/ma502015u] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Daniel F. Sunday
- Materials
Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - R. Joseph Kline
- Materials
Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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4
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Chen XC, Yang H, Green PF. Micellar Formation and Organization in Thin Film Polymer Blends. Macromolecules 2012. [DOI: 10.1021/ma300194d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- X. Chelsea Chen
- Departments
of Materials Science and Engineering, ‡Physics, and §Chemical Engineering, University of Michigan, Ann Arbor, Michigan
48109, United States
| | - Hengxi Yang
- Departments
of Materials Science and Engineering, ‡Physics, and §Chemical Engineering, University of Michigan, Ann Arbor, Michigan
48109, United States
| | - Peter F. Green
- Departments
of Materials Science and Engineering, ‡Physics, and §Chemical Engineering, University of Michigan, Ann Arbor, Michigan
48109, United States
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Song W, Tang P, Qiu F, Yang Y, Shi AC. Phase Behavior of Rod–Coil Diblock Copolymer and Homopolymer Blends from Self-Consistent Field Theory. J Phys Chem B 2011; 115:8390-400. [DOI: 10.1021/jp201972n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wendi Song
- Key Laboratory of Molecular Engineering of Polymer, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Ping Tang
- Key Laboratory of Molecular Engineering of Polymer, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Feng Qiu
- Key Laboratory of Molecular Engineering of Polymer, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yuliang Yang
- Key Laboratory of Molecular Engineering of Polymer, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - An-Chang Shi
- Key Laboratory of Molecular Engineering of Polymer, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
- Department of Physics and Astronomy, McMaster University, Hamilton, L8S 4M1, Canada
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Holoubek J, Baldrian J, Hromádková J, Steinhart M. Self-assembled structures in polystyrene-block-polyisoprene-blend-polystyrene and polystyrene-block-poly(methyl methacrylate)-blend-polystyrene or -blend-poly(methyl methacrylate) in the strong segregation regime. POLYM INT 2010. [DOI: 10.1002/pi.2994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Lefèvre N, Daoulas KC, Müller M, Gohy JF, Fustin CA. Self-Assembly in Thin Films of Mixtures of Block Copolymers and Homopolymers Interacting by Hydrogen Bonds. Macromolecules 2010. [DOI: 10.1021/ma100925c] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nathalie Lefèvre
- Institute of Condensed Matter and Nanosciences (IMCN), Bio- and Soft Matter (BSMA), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Kostas Ch. Daoulas
- Institut für Theoretische Physik, Georg-August-Universität, Friedrich-Hund-Platz, 37077 Göttingen, Germany
| | - Marcus Müller
- Institut für Theoretische Physik, Georg-August-Universität, Friedrich-Hund-Platz, 37077 Göttingen, Germany
| | - Jean-François Gohy
- Institute of Condensed Matter and Nanosciences (IMCN), Bio- and Soft Matter (BSMA), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Charles-André Fustin
- Institute of Condensed Matter and Nanosciences (IMCN), Bio- and Soft Matter (BSMA), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
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Holoubek J, Baldrian J, Hromádková J, Steinhart M. Self-assembled structures in d
8
-polystyrene- block
-polyisoprene/polystyrene blends in the weak segregation regime: SAXS and TEM study. POLYM INT 2009. [DOI: 10.1002/pi.2589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Tirumala VR, Daga V, Bosse AW, Romang A, Ilavsky J, Lin EK, Watkins JJ. Well-Ordered Polymer Melts with 5 nm Lamellar Domains from Blends of a Disordered Block Copolymer and a Selectively Associating Homopolymer of Low or High Molar Mass. Macromolecules 2008. [DOI: 10.1021/ma801124n] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vijay R. Tirumala
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
| | - Vikram Daga
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
| | - August W. Bosse
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
| | - Alvin Romang
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
| | - Jan Ilavsky
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
| | - Eric K. Lin
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
| | - James J. Watkins
- Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003; Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60559
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