Hexagonal Close-Packed Sphere Phase of Conformationally Symmetric Block Copolymer

2020 ◽  
Vol 53 (21) ◽  
pp. 9665-9675
Author(s):  
Nai-Wen Hsu ◽  
Babak Nouri ◽  
Li-Ting Chen ◽  
Hsin-Lung Chen
Keyword(s):  
Block Copolymer ◽  
Hexagonal Close Packed ◽  
Symmetric Block ◽  
Packed Sphere

From hard to soft confinement in a symmetric block copolymer: local and segmental dynamics

Soft Matter ◽  
2011 ◽  
Vol 7 (14) ◽  
pp. 6477 ◽  
Author(s):  
Alejandro Sanz ◽  
Aurora Nogales ◽  
Tiberio A. Ezquerra
Keyword(s):  
Block Copolymer ◽  
Segmental Dynamics ◽  
Symmetric Block

Influence of Segmental Swelling Ratio of a Symmetric Block Copolymer on the Morphology of Melt-Mixed Immiscible Polymer Blends

1999 ◽  
Vol 32 (14) ◽  
pp. 4582-4587 ◽  
Author(s):  
Jong Ryang Kim ◽  
Alex M. Jamieson ◽  
Steven D. Hudson ◽  
Ica Manas-Zloczower ◽  
Hatsuo Ishida
Keyword(s):  
Block Copolymer ◽  
Polymer Blends ◽  
Swelling Ratio ◽  
Immiscible Polymer Blends ◽  
Immiscible Polymer ◽  
Symmetric Block

scholarly journals Close-packed block copolymer micelles induced by temperature quenching

2018 ◽  
Vol 115 (28) ◽  
pp. 7218-7223 ◽  
Author(s):  
Liwen Chen ◽  
Han Seung Lee ◽  
Sangwoo Lee
Keyword(s):  
Block Copolymer ◽  
Spherical Particles ◽  
Face Centered Cubic ◽  
Time Resolved ◽  
Hexagonal Close Packed ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Crystal Grains ◽  
Self Assembled ◽  
Face Centered

Close-packed structures of uniformly sized spheres are ubiquitous across diverse material systems including elements, micelles, and colloidal assemblies. However, the controlled access to a specific symmetry of self-assembled close-packed spherical particles has not been well established. We investigated the ordering of spherical block copolymer micelles in aqueous solutions that was induced by rapid temperature changes referred to as quenching. As a function of quench depth, the quenched self-assembled block copolymer micelles formed three different close-packed structures: face-centered cubic (fcc), random stacking of hexagonal-close-packed layers (rhcp), and hexagonal-close-packed (hcp). The induced hcp and rhcp structures were stable for at least a few weeks when maintained at their quench temperatures, but heating or cooling these hcp and rhcp structures transformed both structures to fcc crystallites with coarsening of the crystal grains, which suggests that these noncubic close-packed structures are intermediate states. Time-resolved scattering experiments prove that the micellar rhcp structures do not originate from the rapid growth of competing close-packed structures. We speculate that the long-lived metastable hcp and rhcp structures originate from the small size of crystal grains, which introduces a nonnegligible Laplace pressure to the crystal domains. The reported transitions from the less stable hcp to the more stable rhcp and fcc are experimental observations of Ostwald’s rule manifesting the transition order of the key close-packed structures in the crystallization of close-packed uniform spheres.

Formation of interconnected morphologies via nanorod inclusion in the confined assembly of symmetric block copolymers

2014 ◽  
Vol 16 (19) ◽  
pp. 8865-8871 ◽  
Author(s):  
Jay Hoon Park ◽  
Yong Lak Joo
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Symmetric Block ◽  
Mesoscale Simulations

Mesoscale simulations demonstrate that nanorod inclusion in a symmetric block copolymer leads to facile formation of interconnected morphologies under cylindrical confinement.

Electric-field-induced lamellar to hexagonally perforated lamellar transition in diblock copolymer thin films: kinetic pathways

2016 ◽  
Vol 18 (36) ◽  
pp. 25609-25620 ◽  
Author(s):  
Arnab Mukherjee ◽  
Kumar Ankit ◽  
Andreas Reiter ◽  
Michael Selzer ◽  
Britta Nestler
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Electric Field ◽  
Diblock Copolymer ◽  
Substrate Interaction ◽  
Symmetric Block

In this work, the confluence of an electric field, substrate interaction and confinement is shown to induce a parallel lamellar to hexagonally perforated lamellar transition in symmetric block-copolymer thin films.

Lamellar Ordering and Crystallization in a Symmetric Block Copolymer

2004 ◽  
Vol 43 (1) ◽  
pp. 59-70 ◽  
Author(s):  
Liangbin Li ◽  
Denitza Lambreva ◽  
Wim H. de Jeu
Keyword(s):  
Block Copolymer ◽  
Symmetric Block

scholarly journals Influence of substrate interaction and confinement on electric-field-induced transition in symmetric block-copolymer thin films

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Arnab Mukherjee ◽  
Rajdip Mukherjee ◽  
Kumar Ankit ◽  
Avisor Bhattacharya ◽  
Britta Nestler
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Electric Field ◽  
Substrate Interaction ◽  
Influence Of Substrate ◽  
Symmetric Block

Improvement of Piezoelectricity of Poly(L-lactide) Film by Using Acrylic Symmetric Block Copolymer as Additive

2013 ◽  
Vol 52 (9S1) ◽  
pp. 09KE02 ◽  
Author(s):  
Yuki Shiomi ◽  
Katsuki Onishi ◽  
Takuo Nakiri ◽  
Kenji Imoto ◽  
Fumi Ariura ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Symmetric Block

scholarly journals Morphology of symmetric block copolymer in a cylindrical pore

2001 ◽  
Vol 115 (17) ◽  
pp. 8226-8230 ◽  
Author(s):  
G. J. A. Sevink ◽  
A. V. Zvelindovsky ◽  
J. G. E. M. Fraaije ◽  
H. P. Huinink
Keyword(s):  
Block Copolymer ◽  
Cylindrical Pore ◽  
Symmetric Block
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