From Hard Spheres to Soft Spheres:  The Effect of Copolymer Composition on the Structure of Micellar Cubic Phases Formed by Diblock Copolymers in Aqueous Solution

Langmuir ◽  
2000 ◽  
Vol 16 (6) ◽  
pp. 2508-2514 ◽  
Author(s):  
Ian W. Hamley ◽  
Christophe Daniel ◽  
Withawat Mingvanish ◽  
Shao-Min Mai ◽  
Colin Booth ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Diblock Copolymers ◽  
Hard Spheres ◽  
Copolymer Composition ◽  
Cubic Phases ◽  
Soft Spheres

scholarly journals Liquid Crystal Ordering in the Hexagonal Phase of Rod-Coil Diblock Copolymers

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1262
Author(s):  
Mikhail A. Osipov ◽  
Maxim V. Gorkunov ◽  
Alexander A. Antonov
Keyword(s):  
Liquid Crystal ◽  
Order Parameter ◽  
Density Functional ◽  
Diblock Copolymers ◽  
Microphase Separation ◽  
Hexagonal Phase ◽  
Orientational Order ◽  
Order Parameters ◽  
Copolymer Composition ◽  
Rigid Rod

Density functional theory of rod-coil diblock copolymers, developed recently by the authors, has been generalised and used to study the liquid crystal ordering and microphase separation effects in the hexagonal, lamellar and nematic phases. The translational order parameters of rod and coil monomers and the orientational order parameters of rod-like fragments of the copolymer chains have been determined numerically by direct minimization of the free energy. The phase diagram has been derived containing the isotropic, the lamellar and the hexagonal phases which is consistent with typical experimental data. The order parameter profiles as functions of temperature and the copolymer composition have also been determined in different anisotropic phases. Finally, the spatial distributions of the density of rigid rod fragments and of the corresponding orientational order parameter in the hexagonal phase have been calculated.

Synthesis and aggregation behaviour of thermo-responsive-b-poly(ionic liquid) diblock copolymers in aqueous solution

2021 ◽  
pp. 116754
Author(s):  
Yongfang Yao ◽  
Chetan Patel ◽  
Rohit L. Vekariya ◽  
Shin-ichi Yusa ◽  
Chetan B. Sangani ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ionic Liquid ◽  
Diblock Copolymers ◽  
Aggregation Behaviour ◽  
Poly Ionic Liquid

Micellization and Gelation of Diblock Copolymers of Ethylene Oxide and Styrene Oxide in Aqueous Solution

Langmuir ◽  
2002 ◽  
Vol 18 (22) ◽  
pp. 8685-8691 ◽  
Author(s):  
Michael Crothers ◽  
David Attwood ◽  
John H. Collett ◽  
Zhuo Yang ◽  
Colin Booth ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ethylene Oxide ◽  
Diblock Copolymers ◽  
Styrene Oxide

Sphere to Rod Transition of Micelles Formed by Amphiphilic Diblock Copolymers of Vinyl Ethers in Aqueous Solution

1999 ◽  
Vol 32 (3) ◽  
pp. 697-703 ◽  
Author(s):  
Minoru Nakano ◽  
Hideki Matsuoka ◽  
Hitoshi Yamaoka ◽  
Andreas Poppe ◽  
Dieter Richter
Keyword(s):  
Aqueous Solution ◽  
Diblock Copolymers ◽  
Vinyl Ethers ◽  
Amphiphilic Diblock Copolymers

scholarly journals A mild and quantitative route towards well-defined strong anionic/hydrophobic diblock copolymers: synthesis and aqueous self-assembly

2019 ◽  
Vol 10 (45) ◽  
pp. 6109-6115
Author(s):  
Anton H. Hofman ◽  
Remco Fokkink ◽  
Marleen Kamperman
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Diblock Copolymers

Well-defined hydrophobic/strong anionic diblock copolymers were synthesized through a protected hydrophobic intermediate. Their self-assembly in aqueous solution was subsequently studied.

scholarly journals Discharge of soft and hard grains and their mixtures from 2D silos

2021 ◽  
Vol 249 ◽  
pp. 03002
Author(s):  
Jing Wang ◽  
Kirsten Harth ◽  
Ralf Stannarius ◽  
Bo Fan ◽  
Tamás Börzsönyi
Keyword(s):  
Hard Spheres ◽  
Gradual Transition ◽  
Soft Particle ◽  
Two Dimensional ◽  
Hard Particles ◽  
Soft Spheres ◽  
Particle Ensemble

The outflow characteristics of hard grains from containers with narrow basal openings have been extensively studied. Recently, it was shown that soft, low-frictional grains can behave qualitatively different from the behavior of rigid grains. We compare experimentally the discharge of monodisperse hard spheres, soft spheres and mixtures of both from a quasi-two dimensional (2D) silo. The experiments demonstrate the remarkable consequences of the addition of few hard particles to a soft particle ensemble, as well as the gradual transition between the two limiting cases of pure one-component materials.

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