Neutron spin-echo investigation of the dynamics of block copolymer micelles

2003 ◽  
Vol 119 (15) ◽  
pp. 8158-8161 ◽  
Author(s):  
V. Castelletto ◽  
I. W. Hamley ◽  
Z. Yang ◽  
W. Haeussler
Keyword(s):  
Block Copolymer ◽  
Spin Echo ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

scholarly journals Bending elastic properties of a block copolymer-rich lamellar phase doped by a surfactant: a neutron spin-echo study

Soft Matter ◽  
2014 ◽  
Vol 10 (36) ◽  
pp. 6926-6930 ◽  
Author(s):  
H. Egger ◽  
G. H. Findenegg ◽  
O. Holderer ◽  
R. Biehl ◽  
M. Monkenbusch ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Elastic Properties ◽  
Spin Echo ◽  
Lamellar Phase ◽  
Neutron Spin ◽  
Neutron Spin Echo

scholarly journals Neutron Spin−Echo Study of the Dynamic Behavior of Amphiphilic Diblock Copolymer Micelles in Aqueous Solution

Langmuir ◽  
2000 ◽  
Vol 16 (24) ◽  
pp. 9177-9185 ◽  
Author(s):  
Hideki Matsuoka ◽  
Yusuke Yamamoto ◽  
Minoru Nakano ◽  
Hitoshi Endo ◽  
Hitoshi Yamaoka ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Dynamic Behavior ◽  
Diblock Copolymer ◽  
Spin Echo ◽  
Neutron Spin ◽  
Amphiphilic Diblock Copolymer ◽  
Neutron Spin Echo ◽  
Copolymer Micelles

scholarly journals Polymer Dynamics in Block Copolymer Electrolytes Detected by Neutron Spin Echo

2020 ◽  
Vol 9 (5) ◽  
pp. 639-645
Author(s):  
Whitney S. Loo ◽  
Antonio Faraone ◽  
Lorena S. Grundy ◽  
Kevin W. Gao ◽  
Nitash P. Balsara
Keyword(s):  
Block Copolymer ◽  
Spin Echo ◽  
Polymer Dynamics ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Block Copolymer Electrolytes

scholarly journals Dynamics of deuterated polystyrene-protonated butadiene diblock copolymer micelles by neutron spin echo

2005 ◽  
Vol 122 (14) ◽  
pp. 144905 ◽  
Author(s):  
T. Kanaya ◽  
M. Monkenbusch ◽  
H. Watanabe ◽  
M. Nagao ◽  
D. Richter
Keyword(s):  
Diblock Copolymer ◽  
Spin Echo ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Copolymer Micelles

β-lactam Functionalized Poly(isoprene-b-ethylene oxide) Amphiphilic Block Copolymer Micelles as a New Nanocarrier System for Curcumin

2010 ◽  
Vol 6 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Konstantinos Gardikis ◽  
Konstantinos Dimas ◽  
Aristidis Georgopoulos ◽  
Eleni Kaditi ◽  
Stergios Pispas ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Amphiphilic Block Copolymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Donnan Equilibria in Polymeric Micellar Systems with Weak Polyelectrolyte Shells: The Lowering of the pH Value

1997 ◽  
Vol 62 (11) ◽  
pp. 1730-1736 ◽  
Author(s):  
Petr Munk ◽  
Zdeněk Tuzar ◽  
Karel Procházka
Keyword(s):  
Ionic Strength ◽  
Block Copolymer ◽  
Ph Value ◽  
Electrolyte Solutions ◽  
Hydrogen Ions ◽  
Micellar Systems ◽  
Weak Electrolytes ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Polyelectrolyte Solutions

When two electrolyte solutions are separated and only some of the ions can cross the boundary, the concentrations of these ions are different on both sides of the boundary. This is the well-known Donnan effect. When weak electrolytes are involved, the imbalance includes also hydrogen ions: there is a difference of pH across the boundary and the dissociation of nondiffusible weak electrolytes is suppressed. The effect is very pronounced when the concentration of the weak electrolyte is high and ionic strength is low. The significance of this phenomenon is discussed for polyelectrolyte solutions, and particularly for block copolymer micelles with weak polyelectrolyte shells. The effect is quite dramatic in the latter case.

A Monte Carlo Study of Flexible Polymer Chain Conformations in Restricted Volumes. I. A Model for Insoluble Blocks Conformations in Swollen Cores of Multimolecular Spherical Block Copolymer Micelles

1993 ◽  
Vol 58 (10) ◽  
pp. 2290-2304 ◽  
Author(s):  
Zuzana Limpouchová ◽  
Karel Procházka
Keyword(s):  
Monte Carlo ◽  
Block Copolymer ◽  
Monte Carlo Study ◽  
Volume Effect ◽  
Micellar Systems ◽  
Flexible Polymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Chain Conformations ◽  
Chain Lengths

Monte Carlo simulations of chain conformations in a restricted spherical volume at relatively high densities of segments were performed for various numbers of chains, N, and chain lengths (number of segments), L, on a tetrahedral lattice. All chains are randomly end-tethered to the surface of the sphere. A relatively uniform surface density of the tethered ends is guaranteed in our simulations. A simultaneous self-avoiding walk of all chains creates starting conformations for a subsequent equilibration. A modified algorithm similar to that of Siepmann and Frenkel is used for the equilibration of the chain conformations. In this paper, only a geometrical excluded volume effect of segments is considered. Various structural and conformational characteristics, e.g. segment densities gS(r), free end densities gF(r) as functions of the position in the sphere (a distance from the center), distributions of the tethered-to-free end distances, ρTF(rTF), etc. are calculated and their physical meaning is discussed. The model is suitable for studies of chain conformations is swollen cores of multimolecular block copolymer micelles and for interpretation of non-radiative excitation energy migration in polymeric micellar systems.

Study of Sedimentation Velocity of Block Copolymer Micelles

1993 ◽  
Vol 58 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Minmin Tian ◽  
C. Ramireddy ◽  
Stephen E. Webber ◽  
Petr Munk
Keyword(s):  
Block Copolymer ◽  
Methacrylic Acid ◽  
Mixed Solvent ◽  
Hard Spheres ◽  
Sedimentation Velocity ◽  
Hydrodynamic Coefficient ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Size Heterogeneity ◽  
Good Agreement

No anomalies were observed during the measurement of sedimentation coefficients of block copolymer micelles formed by copolymers of styrene and methacrylic acid in a mixed solvent; 80 vol.% of dioxane and 20 vol.% of water. The shapes of the sedimenting boundaries suggest that the size heterogeneity of the micelles is small. Linear relations between 1/s and c were obtained. The value of the hydrodynamic coefficient κ was between 2 and 4 in a good agreement with the value 2.75 or 2.86 that was obtained by combining Burgers' or Fixman's values of the coefficient of the concentration dependence kvs for hard spheres with Einstein's value of [η] for spheres.

Chain Exchange Kinetics of Bottlebrush Block Copolymer Micelles

2021 ◽  
Author(s):  
Seyoung Kim ◽  
Sangho Lee ◽  
Soo-Hyung Choi ◽  
Kookheon Char
Keyword(s):  
Block Copolymer ◽  
Block Copolymer Micelles ◽  
Exchange Kinetics ◽  
Copolymer Micelles ◽  
Kinetics Of

Study on the temperature-dependent coupling among viscosity, conductivity and structural relaxation of ionic liquids

2015 ◽  
Vol 17 (29) ◽  
pp. 19126-19133 ◽  
Author(s):  
Tsuyoshi Yamaguchi ◽  
Takuya Yonezawa ◽  
Shinobu Koda
Keyword(s):  
Ionic Liquids ◽  
Structural Relaxation ◽  
Spin Echo ◽  
Neutron Spin ◽  
Temperature Dependent ◽  
Frequency Dependent ◽  
Neutron Spin Echo ◽  
Dependent Viscosity

The frequency-dependent viscosity and conductivity of three imidazolium-based ionic liquids were measured at several temperatures in the MHz region, and the results are compared with the intermediate scattering functions determined by neutron spin echo spectroscopy.

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