Surfaces of tricontinuous structure formed by an ABC triblock copolymer in bulk

Matsushita, Yushu; Suzuki, Jirô; Seki, Motohiro

doi:10.1016/s0921-4526(98)00239-7

Cited by 68 publications

(85 citation statements)

References 9 publications

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“…However, several different criteria for positioning the two networks yield indistinguishable structure factors. Figure 6 shows the average value of the {110} and {200} structure factors for this constantcurvature double gyroid (G CC ) model as a function of contraction along the, [100], [110], [111], and [16,9,4] directions. The structure factors rapidly grow as the structure is compressed, and their average values for a contraction of s ) 30% are reported in Table 2.…”

Section: I(qθ)mentioning

confidence: 99%

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A Re-Evaluation of the Morphology of a Bicontinuous Block Copolymer−Ceramic Material

et al. 2007

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The structures of a poly(isoprene-block-ethylene oxide) (PI-b-PEO) block copolymer-directed aluminosilicate mesostructure and the resulting ceramic material obtained from calcination were studied via smallangle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The PI minority phase (volume fraction 0.36) formed a continuous network of channels, previously reported 1,2 to be consistent with the plumber's nightmare 3 morphology. The solvent casting process used to form the material caused it to shrink uniaxially by ∼30%, deforming the network structure within it. Calculated structure factors for constant-curvature and constantthickness models of a distorted double gyroid structure are consistent with SAXS from the material, while [100] and [111] projections of the distorted double gyroid structure match the TEM data. Because the structural data from the material is most consistent with a distorted version of the double gyroid morphology, the previous assignment of the plumber's nightmare morphology must be reconsidered. Approaches for structural assignment are also discussed.

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Section: I(qθ)mentioning

confidence: 99%

“…Finally, structure factors were evaluated by applying Abbe's transformation to the discrete representation of the inner and outer membrane surfaces. 13 [16,9,4] directions. As expected, larger structural rearrangements are possible when material can move within the continuous PI and PEO/aluminosilicate domains.…”

Section: I(qθ)mentioning

confidence: 99%

A Re-Evaluation of the Morphology of a Bicontinuous Block Copolymer−Ceramic Material

et al. 2007

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“…[23] A linear three component triblock can also produce a double gyroid structure, with the two different networks (A and C blocks) separated by a matrix (B). [24] Based on the large array of structures and compositions available and the ability to tailor the relative domain sizes through control of molecular weight and through blending, the potential for self-assembled materials with photonic crystal geometries not readily attainable by other synthetic/processing approaches is apparent.…”

Section: Intricate Block Polymer Structuresmentioning

confidence: 99%

Polymer‐Based Photonic Crystals

et al. 2001

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In this report, we highlight the development of polymers as 1D photonic crystals and subsequently place special emphasis on the activities in self‐assembled block copolymers as a promising platform material for new photonic crystals. We review recent progress, including the use of plasticizer and homopolymer blends of diblock copolymers to increase periodicity and the role of self‐assembly in producing 2D and 3D photonic crystals. The employment of inorganic nanoparticles to increase the dielectric contrast and the application of a biasing field during self‐assembly to control the long‐range domain order and orientation are examined, as well as in‐situ tunable materials via a mechanochromic materials system. Finally, the inherent optical anisotropy of extruded polymer films and side‐chain liquid‐crystalline polymers is shown to provide greater degrees of freedom for further novel optical designs.

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“…More recently, experiments have shown that one additional block can produce remarkable morphological complexity. [2][3][4][5][6][7][8][9][10][11] Roughly 20 morphologies have been documented in linear ABC triblock copolymers including core-shell versions of the diblock structures (spheres, cylinders, gyroid, and lamellae), mixed geometry microstructures such as spheres in cylinders, cylinders in lamellae, rings on rods, and the exquisite knitting pattern. Systematizing such phase behavior, analogous to what has been accomplished with diblocks, is challenging, owing to a drastically expanded parameter space.…”

Section: Introductionmentioning

confidence: 99%

A Noncubic Triply Periodic Network Morphology in Poly(isoprene-b-styrene-b-ethylene oxide) Triblock Copolymers

et al. 2002

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We present characterization data for linear poly(isoprene-b-styrene-b-ethylene oxide) (PI-PS-PEO) triblock copolymers containing equal volume fractions of PI and PS (f PI ) fPS) and varying amounts of PEO, 0 e fPEO e 1 /3. Detailed characterization by TEM, SAXS, dynamic mechanical spectroscopy, static birefringence, and DSC indicates three distinct morphologies: two-domain lamellae, a three-domain noncubic triply periodic network structure, and three-domain lamellae with increasing PEO content. This phase behavior is in striking contrast with the homologous PS-PI-PEO triblock phase diagram, reported earlier, which contains four different morphologies between the limiting two-and threedomain lamellae phases. Preliminary analysis suggests the noncubic network structure contains elementary units of 3-fold coordination, yet fundamentally distinct from the cubic core-shell gyroid topology previously demonstrated in PS-PI-PEO. This tentatively assigned model is a structural hybrid of the gyroid and perforated lamellar morphologies. These results provide quantitative evidence regarding the effects of block sequencing on the phase behavior of ABC triblock copolymers near the order-disorder transition.

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Surfaces of tricontinuous structure formed by an ABC triblock copolymer in bulk

Cited by 68 publications

References 9 publications

A Re-Evaluation of the Morphology of a Bicontinuous Block Copolymer−Ceramic Material

A Re-Evaluation of the Morphology of a Bicontinuous Block Copolymer−Ceramic Material

Polymer‐Based Photonic Crystals

A Noncubic Triply Periodic Network Morphology in Poly(isoprene-b-styrene-b-ethylene oxide) Triblock Copolymers

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