Simulation of phase separation in melts of reacting multiblock copolymers

2011 ◽  
Vol 53 (12) ◽  
pp. 1207-1216 ◽  
Author(s):  
A. A. Gavrilov ◽  
D. V. Guseva ◽  
Ya. V. Kudryavtsev ◽  
P. G. Khalatur ◽  
A. V. Chertovich
Keyword(s):  
Phase Separation ◽  
Multiblock Copolymers

scholarly journals Micelle formation, gelation and phase separation of amphiphilic multiblock copolymers†

Soft Matter ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 2580 ◽  
Author(s):  
Virginie Hugouvieux ◽  
Monique A. V. Axelos ◽  
Max Kolb
Keyword(s):  
Phase Separation ◽  
Micelle Formation ◽  
Multiblock Copolymers

Investigation of phase separation in multiblock copolymers consisting of polysulfone and a liquid crystalline polymer

1999 ◽  
Vol 38 (5-6) ◽  
pp. 549-562 ◽  
Author(s):  
Antje Gottwald ◽  
Dieter Jehnichen ◽  
Doris Pospiech ◽  
Peter Friedel ◽  
Andreas Janke
Keyword(s):  
Phase Separation ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Multiblock Copolymers

Synthesis and Phase Separation Behaviour of High Performance Multiblock Copolymers

2001 ◽  
Vol 13 (2) ◽  
pp. S275-S292 ◽  
Author(s):  
Doris Pospiech ◽  
Liane Häußler ◽  
Kathrin Eckstein ◽  
Hartmut Komber ◽  
Dieter Voigt ◽  
...  
Keyword(s):  
Phase Separation ◽  
High Performance ◽  
Multiblock Copolymers

Simulation of phase separation in melts of regular and random multiblock copolymers

2011 ◽  
Vol 53 (9) ◽  
pp. 827-836 ◽  
Author(s):  
A. A. Gavrilov ◽  
Ya. V. Kudryavtsev ◽  
P. G. Khalatur ◽  
A. V. Chertovich
Keyword(s):  
Phase Separation ◽  
Multiblock Copolymers

The soliton mechanism of phase separation of polydisperse multiblock copolymers

2016 ◽  
Vol 58 (1) ◽  
pp. 111-119 ◽  
Author(s):  
A. N. Ivanova ◽  
S. I. Kuchanov ◽  
Sh. A. Shaginyan ◽  
L. I. Manevitch
Keyword(s):  
Phase Separation ◽  
Multiblock Copolymers

Bulk standards for low-temperature biological x-ray microanalysis

1984 ◽  
Vol 42 ◽  
pp. 282-283
Author(s):  
P. Echlin ◽  
M. McKoon ◽  
E.S. Taylor ◽  
C.E. Thomas ◽  
K.L. Maloney ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Analytical Method ◽  
Salt Solutions ◽  
Absolute Concentration ◽  
Cooling Process ◽  
X Ray ◽  
The Absolute ◽  
Analytical Procedures ◽  
Electrical Conductors

Although sections of frozen salt solutions have been used as standards for x-ray microanalysis, such solutions are less useful when analysed in the bulk form. They are poor thermal and electrical conductors and severe phase separation occurs during the cooling process. Following a suggestion by Whitecross et al we have made up a series of salt solutions containing a small amount of graphite to improve the sample conductivity. In addition, we have incorporated a polymer to ensure the formation of microcrystalline ice and a consequent homogenity of salt dispersion within the frozen matrix. The mixtures have been used to standardize the analytical procedures applied to frozen hydrated bulk specimens based on the peak/background analytical method and to measure the absolute concentration of elements in developing roots.

Morphological studies of linear (AB)n multiblock copolymers and their blends

1992 ◽  
Vol 50 (1) ◽  
pp. 384-385
Author(s):  
Richard J. Spontak ◽  
Steven D. Smith ◽  
Arman Ashraf
Keyword(s):  
Electron Microscopy ◽  
Microphase Separation ◽  
Multiblock Copolymers ◽  
First Order ◽  
Morphological Studies ◽  
Transmission Electron ◽  
First Order Phase Transition ◽  
Covalently Bonded ◽  
Total Molecular Weight ◽  
First Order Phase

Block copolymers are composed of sequences of dissimilar chemical moieties covalently bonded together. If the block lengths of each component are sufficiently long and the blocks are thermodynamically incompatible, these materials are capable of undergoing microphase separation, a weak first-order phase transition which results in the formation of an ordered microstructural network. Most efforts designed to elucidate the phase and configurational behavior in these copolymers have focused on the simple AB and ABA designs. Few studies have thus far targeted the perfectly-alternating multiblock (AB)n architecture. In this work, two series of neat (AB)n copolymers have been synthesized from styrene and isoprene monomers at a composition of 50 wt% polystyrene (PS). In Set I, the total molecular weight is held constant while the number of AB block pairs (n) is increased from one to four (which results in shorter blocks). Set II consists of materials in which the block lengths are held constant and n is varied again from one to four (which results in longer chains). Transmission electron microscopy (TEM) has been employed here to investigate the morphologies and phase behavior of these materials and their blends.

Sign in / Sign up

Export Citation Format

Share Document