Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer

Ahn, Seonghyeon; Kwak, Jongheon; Choi, Chungryong; Seo, Yeseong; Kim, Jin Kon; Lee, Byeongdu

doi:10.1021/acs.macromol.7b01734

Cited by 23 publications

(45 citation statements)

References 53 publications

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“…Common reflections at relative q values of

\sqrt{6}

\sqrt{20}

\sqrt{22}

, and

\sqrt{40}

point to a core–shell double gyroid morphology . In literature, the pentacontinuous core–shell double gyroid structure is reported to be found in asymmetric triblock terpolymers when the volume fraction of the largest block is between 0.4 and 0.6 . Neat ISM 318 has PS as the largest block with a volume fraction of 0.59 which suits those data and emphasize our assumption.…”

Section: Resultssupporting

confidence: 84%

“…Decorated morphologies, as for example, spheres on spheres, spheres on cylinder, cylinder on cylinder, are more difficult to achieve and less common as new blend structures. In literature, many examples for lamellae, gyroids, and core–shell structured blend morphologies can be found . Taken this into account, it is not against expectation to observe the same sequence in the transitions from core–shell double gyroid to core–shell cylinders and to core–shell spheres for both blend series.…”

Section: Resultsmentioning

confidence: 88%

“…The formation of core–shell spheres instead, is due to the fact that the shell‐forming PI domain from series B is a blend domain while the sphere‐forming PI domain from series A, and the sphere‐forming PB domain from SBM are not. Blends are known to develop morphologies which cannot be achieved by pure block copolymers or are stable at an overall composition window shifted with respect to them . Two main factors influence this special behavior seen for blends.…”

Section: Resultsmentioning

confidence: 99%

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Morphological Control Over Three‐ and Four‐Phase Superstructures in Blends of Asymmetric ABC and BAC Triblock Terpolymers

Haenelt

Abetz

2018

Macro Chemistry & Physics

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The versatile and simple attainment of complex superstructures through binary blends of asymmetric polyisoprene‐block‐polystyrene‐block‐poly(methyl methacrylate) (ISM) and polystyrene‐block‐polyisoprene‐block‐poly(methyl methacrylate) (SIM) triblock terpolymers is shown. Different well‐ordered core–shell morphologies with three or four microphases as well as interchanged core‐ and shell‐forming blocks are achieved by different spatial superposition during mixing. Superstructures with three microphases are obtained by antiparallel chain orientation, when ISM and SIM chains align in opposite directions. Similarly, the respective PS, PI, and PMMA blocks are in direct superposition and mix into each other. In contrast, with parallel chain orientation, ISM and SIM chains align in the same direction. It gives rise to four microphases because here, both PI blocks do not assemble into one microdomain, but form two isolated microdomains. These observations are attributed to inverse molecular weight ratios between both blends.

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“…Common reflections at relative q values of

\sqrt{6}

\sqrt{20}

\sqrt{22}

, and

\sqrt{40}

Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Morphological Control Over Three‐ and Four‐Phase Superstructures in Blends of Asymmetric ABC and BAC Triblock Terpolymers

Haenelt

Abetz

2018

Macro Chemistry & Physics

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“…Schematic illustration of the morphology observed by Ahn et al [ 23 ] for a blend of PI‐ b ‐PS‐ b ‐P2VP and PI‐ b ‐PS. Reproduced with permission.…”

Section: From Monomodal To Multimodal Dispersity Using Blends Of Blocmentioning

confidence: 99%

Nonclassical Block Copolymer Self‐Assembly Resulting from a Constrained Location of Chains and Junctions

Matsushita

Takano

Vayer

et al. 2020

Adv Materials Inter

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During the self‐assembly process of block copolymers, interfaces are formed as a result of the microphase separation between the blocks. The location of the polymer chains and block junctions with respect to these interfaces is crucial and drives the morphology. It depends on the dispersities (e.g., molecular mass and composition) of the blocks, their architectures (e.g., linear vs star), and the type of interaction (e.g., repulsion vs attraction). In this review, the authors focus on the formation of unusual morphologies that are obtained in the following three categories: i) multimodal blends of block polymers, ii) star block polymers, and iii) supramolecular assemblies composed of block copolymers. Although these three examples seem to be very different from one another, the authors demonstrate in this review that they all share a constrained location of their chains and/or junctions with respect to the interfaces. In this sense, they deviate from the common behavior of simple linear block copolymers, in which the junctions are located on the interface and homogeneously distributed onto it.

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“…The introduction of controlled radical polymerizations led to a strong increase in the number of block copolymers, which have been experimentally studied. Also controlling the dispersity of block copolymers and blending of block copolymers are possible ways to influence morphologies and also discover new ones which led to a number of experimental and theoretical studies . A number of hierarchical superstructures can be obtained by blending block copolymers with low molecular weight amphiphiles .…”

Section: Microphase Separation In Block Copolymersmentioning

confidence: 99%

Functional Macromolecular Systems: Kinetic Pathways to Obtain Tailored Structures

Abetz

Kremer

Müller

et al. 2018

Macro Chemistry & Physics

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This article aims to stimulate research on non‐equilibrium macromolecular systems, as nowadays a large toolbox to synthesize tailored macromolecules is available. A large variety of characterization methods covering a broad spectrum of length and timescales allows researchers to follow and also manipulate macromolecular systems on their paths toward equilibrium. These possibilities are paralleled by the development of new concepts of the statistical physics of non‐equilibrium phenomena in macromolecular systems as well as new models and algorithms for computer simulation.

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Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer

Cited by 23 publications

References 53 publications

Morphological Control Over Three‐ and Four‐Phase Superstructures in Blends of Asymmetric ABC and BAC Triblock Terpolymers

Morphological Control Over Three‐ and Four‐Phase Superstructures in Blends of Asymmetric ABC and BAC Triblock Terpolymers

Nonclassical Block Copolymer Self‐Assembly Resulting from a Constrained Location of Chains and Junctions

Functional Macromolecular Systems: Kinetic Pathways to Obtain Tailored Structures

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