Real-space evidence of the equilibrium ordered bicontinuous double diamond structure of a diblock copolymer

Soft Matter ◽  
2015 ◽  
Vol 11 (10) ◽  
pp. 1871-1876 ◽  
Author(s):  
C. Y. Chu ◽  
X. Jiang ◽  
H. Jinnai ◽  
R. Y. Pei ◽  
W. F. Lin ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Electron Tomography ◽  
Real Space ◽  
Diamond Structure ◽  
Thermally Stable ◽  
Reversible Transition ◽  
Double Gyroid ◽  
Double Diamond

A thermally stable ordered bicontinuous double diamond (OBDD) structure in a stereoregular diblock copolymer has been revealed by electron tomography. The structure underwent a thermally reversible transition to double gyroid upon heating, accompanied by a reduction of domain spacing.

scholarly journals Correction: Real-space evidence of the equilibrium ordered bicontinuous double diamond structure of a diblock copolymer

Soft Matter ◽  
2015 ◽  
Vol 11 (20) ◽  
pp. 4142-4142 ◽  
Author(s):  
C. Y. Chu ◽  
X. Jiang ◽  
H. Jinnai ◽  
R. Y. Pei ◽  
W. F. Lin ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Real Space ◽  
Diamond Structure ◽  
Double Diamond

The Ordered Bicontinuous Double Diamond Structure in Binary Blends of Diblock Copolymer and Homopolymer.

1989 ◽  
Vol 171 ◽  
Author(s):  
Karen I. Winey ◽  
Edwin L. Thomas
Keyword(s):  
Molecular Weight ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Composition Range ◽  
Volume Fraction ◽  
Diamond Structure ◽  
Binary Blends ◽  
Resultant Effect ◽  
Strong Segregation ◽  
Double Diamond

ABSTRACTWe report the observation of the ordered bicontinuous double diamond (OBDD) structure in binary blends of poly(styrene-isoprene) diblock copolymer and homopolystyrene. The overall polystyrene volume fraction range is 64 - 67 PSvol% for the OBDD structure in binary blends of a lamellar diblock (SI 27/22) and a homopolymer (14.0 hPS). This composition range is approximately within the polystyrene volume fraction range established for pure diblock copolymers in the strong segregation regime having the OBDD structure. Ordered lamellae are observed at approximately 65 PSvol% when the homopolystyrene molecular weight is greater than the molecular weight of the polystyrene block of the copolymer. This observation is discussed in terms of the decreased degree of mixing between the homopolymer and the corresponding block and the resultant effect on the interfacial curvature.

Stabilizing the Ordered Bicontinuous Double Diamond Structure of Diblock Copolymer by Configurational Regularity

2018 ◽  
Vol 51 (11) ◽  
pp. 4049-4058 ◽  
Author(s):  
Chih-Hsuan Lin ◽  
Takeshi Higuchi ◽  
Hsin-Lung Chen ◽  
Jing-Cherng Tsai ◽  
Hiroshi Jinnai ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Diamond Structure ◽  
Double Diamond

Stability of the Double Gyroid Phase in Bottlebrush Diblock Copolymer Melts

2021 ◽  
Author(s):  
So Jung Park ◽  
Guo Kang Cheong ◽  
Frank S. Bates ◽  
Kevin D. Dorfman
Keyword(s):  
Diblock Copolymer ◽  
Copolymer Melts ◽  
Double Gyroid

scholarly journals Spin-echo small-angle neutron scattering (SESANS) studies of diblock copolymer nanoparticles

Soft Matter ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 17-21
Author(s):  
Gregory N. Smith ◽  
Victoria J. Cunningham ◽  
Sarah L. Canning ◽  
Matthew J. Derry ◽  
J. F. K. Cooper ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Diblock Copolymer ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Spin Echo ◽  
Real Space ◽  
Polymer Nanoparticles ◽  
High Contrast ◽  
Concentrated Dispersions

Concentrated dispersions of polymer nanoparticles with high contrast can be studied using SESANS in real space.

Morphologies in Blends of Diblock Copolymer and Homopolymer: Morphology Diagrams and the Intermaterial Dividing Surface

1991 ◽  
Vol 248 ◽  
Author(s):  
Karen I. Winey
Keyword(s):  
Molecular Weight ◽  
Diblock Copolymer ◽  
Mean Curvature ◽  
Morphological Data ◽  
Copolymer Composition ◽  
Binary Blends ◽  
Morphological Transitions ◽  
The Mean ◽  
Dividing Surface ◽  
Double Diamond

AbstractBinary blends of diblock copolymer (AB) and homopolymer (hA) self assemble upon solvent evaporation into a great variety of microphase separated morphologies. The ordered lamellar, bicontinuous double diamond, cylindrical and spherical morphologies were observed by TEM and SAXS in our studies, as well as a range of micellar morphologies.The mean curvature (H) and the area per copolymer junction (σj), which characterize the intermaterial dividing surface, increased with increasing homopolymer concentration in the blend and/or with decreasing homopolymer molecular weight. These trends were generally obeyed both between and within ordered morphology types. The increase in H and σj was related to an increased degree of mixing between the homopolymer and the block of the copolymer.Two types of isothermal morphology diagrams were constructed to consolidate the extensive morphological data and to illustrate the general morphological transitions in AB/hA blends. The constant molecular weight morphology diagrams illustrated the interdependence of the copolymer composition and the homopolymer concentration. The constant copolymer composition diagrams emphasized the importance of the relative homopolymer molecular weight and the overall blend composition.

Three-dimensional real-space crystallography of MCM-48 mesoporous silica revealed by scanning transmission electron tomography

2006 ◽  
Vol 418 (4-6) ◽  
pp. 540-543 ◽  
Author(s):  
Timothy J.V. Yates ◽  
John Meurig Thomas ◽  
Jose-Jesus Fernandez ◽  
Osamu Terasaki ◽  
Ryong Ryoo ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Electron Tomography ◽  
Three Dimensional ◽  
Real Space ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

Electron tomography of microstructural elements in strongly segregated block copolymers

1993 ◽  
Vol 51 ◽  
pp. 888-889
Author(s):  
Richard J. Spontak ◽  
Steven D. Smith ◽  
David A. Agard
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Block Copolymers ◽  
Electron Tomography ◽  
The Other ◽  
Self Organization ◽  
Periodic Surfaces ◽  
Transmission Electron ◽  
Strong Segregation ◽  
Double Diamond

Block copolymers are composed of long contiguous sequences (blocks) of chemically dissimilar monomer species. By themselves or in microphase-separated blends, these materials readily undergo self-organization into either disordered micelles or ordered morphologies, much in the same way as do small-molecule amphiphiles. In the strong-segregation regime, wherein only repulsive monomer interactions and periodic morphologies prevail, a copolymer can assemble into spherical or cylindrical dispersions of one block in a continuous matrix of the other or alternating lamellae. Recent efforts have also shown that an ordered bicontinuous double-diamond morphology (OBDD) exists between the cylindrical and lamellar morphologies. Ongoing studies continue to reveal the existence of other non-classical morphologies, such as the lamellar catenoid, in both pure copolymers and in blends. Attempts to elucidate the 3-D structure of these materials have relied upon computer simulation of idealized periodic surfaces and comparison between “slices” of simulated structures with projections from transmission electron microscopy (TEM).

Unraveling the Self-Assembly of Heterocluster Janus Dumbbells into Hybrid Cubosomes with Internal Double-Diamond Structure

2018 ◽  
Vol 141 (2) ◽  
pp. 831-839 ◽  
Author(s):  
Hong-Kai Liu ◽  
Li-Jun Ren ◽  
Han Wu ◽  
Yong-Li Ma ◽  
Sven Richter ◽  
...  
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Diamond Structure ◽  
Double Diamond

Long-term thermally stable nanoconfining networks for efficient fully conjugated semicrystalline/amorphous diblock copolymer photovoltaics

2019 ◽  
Vol 69 ◽  
pp. 263-274
Author(s):  
Yu-Ping Lee ◽  
Ming-Wei Liu ◽  
Jia-Kuan Qin ◽  
Yi-Huan Lee ◽  
Yi-Lung Yang ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Thermally Stable
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