Long-Range Order of Supramolecular Structures in Amorphous Butadiene-Styrene Block Copolymers

1972 ◽  
Vol 45 (6) ◽  
pp. 1564-1581 ◽  
Author(s):  
G. Kämpf ◽  
H. Krömer ◽  
M. Hoffmann
Keyword(s):  
Block Copolymers ◽  
Long Range ◽  
Colloidal Particles ◽  
Supramolecular Structures ◽  
Range Order ◽  
Long Range Order ◽  
X Ray Diffraction ◽  
The Matrix ◽  
The One ◽  
Butadiene Styrene

Abstract The various methods for determining quantitatively the dimensions of morphological structures from electron micrographs as well as evaluation of small-angle electron and x-ray diffraction are reviewed briefly. In continuation of previous work, the types of long-range order of supramolecular structures observed in two-block butadiene-styrene (BS) copolymers of very uniform molecular structure are discussed. By phase separation, aggregates of the one type of block with uniform shapes and sizes are formed which are arranged strictly periodically in the matrix consisting of the other type of block. Apart from “lattice imperfections”, special regard is given to the formation of boundaries between regions with long-range order of domains. The macroscopic lattices observed in BS block copolymers are compared with the latticelike arrays of colloidal particles found in other systems of a completely different chemical nature.

scholarly journals Zur Darstellung und Kristallstruktur von β-NbO2 / Synthesis and Crystal Structure of β-NbO2

1982 ◽  
Vol 37 (11) ◽  
pp. 1361-1368 ◽  
Author(s):  
H.-J. Schweizer ◽  
Reginald Gruehn
Keyword(s):  
Crystal Structure ◽  
Long Range ◽  
Chemical Transport ◽  
Range Order ◽  
Long Range Order ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants

By using chemical transport reactions with various transporting agents (HgCl2, NbCl5, Nb3O7Cl) a slightly substoiehiometric NbO2-phase, β-NbO2, was obtained from samples with O/Nb ∼ 1.5 (source; T > 1373 K) and with deposition temperatures > 1273 K (sink). The rango of composition of β-NbO2 was found to exist from NbO1.990 to NbO1.998.The structure of the tetragonal, column-shaped black crystals was determined by X-ray diffraction. It crystallizes tetragonally in the space group I41 with lattice constants a = 9.693(3) Å, c = 5.985(1) Å and Z = 10 formula units.The crystal structure of β-NbO2 is shown to be a deformed rutile type. As in α-NbO2 the Nb-atoms are grouped in pairs. However, both oxides are different with respect to their long-range order.

Anomalous x-ray diffraction measurements of long-range order in (001)-texturedL10FePtCu thin films

2012 ◽  
Vol 86 (2) ◽  
Author(s):  
M. Maret ◽  
C. Brombacher ◽  
P. Matthes ◽  
D. Makarov ◽  
N. Boudet ◽  
...  
Keyword(s):  
Thin Films ◽  
Long Range ◽  
Range Order ◽  
Long Range Order ◽  
X Ray Diffraction ◽  
X Ray

Measurement of Long Range Order in the γ’ Phase of Nickel-Base Superalloys

1969 ◽  
Vol 13 ◽  
pp. 598-608
Author(s):  
J.R. Mihalisin
Keyword(s):  
High Temperature ◽  
Long Range ◽  
Range Order ◽  
Long Range Order ◽  
X Ray Diffraction ◽  
High Temperature Heat Treatment ◽  
Heat Treated ◽  
Temperature Heat ◽  
Long Time ◽  
Nickel Base

The long range order parameter (S) has been measured at room- temperature on the γ’ phase extracted from IN-731 and alloys 713C and 713LC by x-ray diffraction techniques. Measurements were obtained from specimens of IN-731 and alloy 713LC in the as-cast condition and after long time rupture testing. The alloy 713 c specimens were in the as-cast and high temperature heat treated conditions.It was found that long range order in the γ’ phase of IN-731 and alloy 713LC was changed very little after long time rupture testing, and after high temperature heat treatment in the case of alloy 713C.

scholarly journals Coexistence of magnetic fluctuations and long-range order in the one-dimensional J1−J2 zigzag chain materials BaDy2O4 and BaHo2O4

2018 ◽  
Vol 98 (14) ◽  
Author(s):  
Bobby Prévost ◽  
Nicolas Gauthier ◽  
Vladimir Y. Pomjakushin ◽  
Bernard Delley ◽  
Helen C. Walker ◽  
...  
Keyword(s):  
Long Range ◽  
Range Order ◽  
Zigzag Chain ◽  
Long Range Order ◽  
Magnetic Fluctuations ◽  
One Dimensional ◽  
The One

Long-Range Order Self-Assembly of Conjugated Block Copolymers at Inclined Air–Liquid Interfaces

2020 ◽  
Vol 12 (4) ◽  
pp. 5099-5105 ◽  
Author(s):  
Saejin Oh ◽  
Seulki Kang ◽  
Ma. Helen M. Cativo ◽  
Myungjae Yang ◽  
Sung-Hee Chung ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Long Range ◽  
Self Assembly ◽  
Range Order ◽  
Long Range Order ◽  
Liquid Interfaces

High-Resolution Small-Angle X-Ray Diffraction Study of Long-Range Order in Hard-Sphere Colloidal Crystals

2002 ◽  
Vol 88 (20) ◽  
Author(s):  
A. V. Petukhov ◽  
D. G. A. L. Aarts ◽  
I. P. Dolbnya ◽  
E. H. A. de Hoog ◽  
K. Kassapidou ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffraction Study ◽  
Long Range ◽  
Small Angle ◽  
Hard Sphere ◽  
Colloidal Crystals ◽  
Range Order ◽  
Long Range Order ◽  
X Ray Diffraction ◽  
X Ray
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