A Theoretical Study of Phase Behaviors for Diblock Copolymers in Selective Solvents

2009 ◽  
Vol 42 (17) ◽  
pp. 6791-6798 ◽  
Author(s):  
Tongchuan Suo ◽  
Dadong Yan ◽  
Shuang Yang ◽  
An-Chang Shi
Keyword(s):  
Diblock Copolymers ◽  
Theoretical Study ◽  
Selective Solvents ◽  
Phase Behaviors

A Comparative Experimental and Theoretical Study between Heteroarm Star and Diblock Copolymers in the Microphase Separated State

2000 ◽  
Vol 33 (17) ◽  
pp. 6330-6339 ◽  
Author(s):  
Valérie Grayer ◽  
Elena E. Dormidontova ◽  
Georges Hadziioannou ◽  
Constantinos Tsitsilianis
Keyword(s):  
Diblock Copolymers ◽  
Theoretical Study

Design, synthesis, and phase behaviors of a novel triphenylene-based side chain liquid crystalline diblock copolymer

2018 ◽  
Vol 42 (16) ◽  
pp. 13581-13588
Author(s):  
Jianfeng Ban ◽  
Lulu Pan ◽  
Bo Shi ◽  
Hailiang Zhang
Keyword(s):  
Diblock Copolymer ◽  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Weight Fraction ◽  
Side Chain ◽  
Design Synthesis ◽  
Phase Behaviors

Influence of the weight fraction of PMT6S on the phase behaviors of diblock copolymers.

Phase behaviors of cyclic diblock copolymers

2011 ◽  
Vol 135 (17) ◽  
pp. 174902 ◽  
Author(s):  
Guojie Zhang ◽  
Zhongyong Fan ◽  
Yuliang Yang ◽  
Feng Qiu
Keyword(s):  
Diblock Copolymers ◽  
Phase Behaviors

Self-assembly of linear diblock copolymers in selective solvents: from single micelles to particles with tri-continuous inner structures

Soft Matter ◽  
2020 ◽  
Vol 16 (26) ◽  
pp. 6056-6062 ◽  
Author(s):  
Xianggui Ye ◽  
Bamin Khomami
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Large Scale ◽  
Diblock Copolymers ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
The Self ◽  
Selective Solvent ◽  
Selective Solvents

Large-scale dissipative particle dynamics (DPD) simulations have been performed to investigate the self-assembly of over 20 000 linear diblock copolymer chains in a selective solvent.

Phase Behavior of Styrene−Isoprene Diblock Copolymers in Strongly Selective Solvents

2002 ◽  
Vol 35 (3) ◽  
pp. 841-849 ◽  
Author(s):  
Chiajen Lai ◽  
William B. Russel ◽  
Richard A. Register
Keyword(s):  
Phase Behavior ◽  
Diblock Copolymers ◽  
Selective Solvents

1998 E.W.R. Steacie Award Lecture Asymmetric amphiphilic block copolymers in solution: a morphological wonderland

1999 ◽  
Vol 77 (8) ◽  
pp. 1311-1326 ◽  
Author(s):  
Neil S Cameron ◽  
Muriel K Corbierre ◽  
Adi Eisenberg
Keyword(s):  
Self Assembly ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Polymer Composition ◽  
Selective Solvents ◽  
Thermodynamic And Kinetic Parameters ◽  
Amphiphilic Diblock Copolymers ◽  
Systematic Understanding ◽  
Selection Of ◽  
Qualitative Discussion

Asymmetric amphiphilic diblock copolymers self-assemble in selective solvents. Since 1995, when we first reported the systematic preparation of a sequence of various "crew-cut" aggregate morphologies from this class of copolymer in solution (1), we have identified a vast array of structures and have begun a detailed investigation of the thermodynamic and kinetic parameters that induce morphogenesis. Not only spheres, rods, bilayer and bicontinuous architectures, as well as inverted structures are observed, but also a selection of mixed, combined and much more complex aggregates is documented. All of these aggregates have a phase-separated insoluble core and a crew-cut soluble corona. Thus, all parameters that permit selective modification of the component of either phase or of the interface provide a window for morphological control. By carefully adjusting the polymer chain environment, it has been possible to develop a systematic understanding of morphogenic parameters, which include, among others, polymer composition, common solvent, initial concentration, temperature, type and concentration of added ions, method of preparation, and added homopolymer. To date, more than 30 publications have appeared in the literature from our group alone on this subject. One of the problems inherent with such a complicated system is the taxonomy or classification: which morphologies correspond to equilibrium positions and which are intermediate or trapped? An attempt at a logical presentation of the observed aggregates is given, preceded by a qualitative discussion of the thermodynamic framework for this system. Where possible, the transitions between morphologies are explained in the context of the thermodynamic parameters. Finally, parallels are drawn between the copolymer aggregates and biological architectures.Key words: crew-cut, morphology, block copolymer, self-assembly, amphiphile.

scholarly journals Uniform electroactive fibre-like micelle nanowires for organic electronics

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Xiaoyu Li ◽  
Piotr J. Wolanin ◽  
Liam R. MacFarlane ◽  
Robert L. Harniman ◽  
Jieshu Qian ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Charge Carrier ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Field Effect Transistors ◽  
Fibre Length ◽  
Charge Carrier Mobility ◽  
Degree Of Polymerization ◽  
Selective Solvents ◽  
The Individual

Abstract Micelles formed by the self-assembly of block copolymers in selective solvents have attracted widespread attention and have uses in a wide variety of fields, whereas applications based on their electronic properties are virtually unexplored. Herein we describe studies of solution-processable, low-dispersity, electroactive fibre-like micelles of controlled length from π-conjugated diblock copolymers containing a crystalline regioregular poly(3-hexylthiophene) core and a solubilizing, amorphous regiosymmetric poly(3-hexylthiophene) or polystyrene corona. Tunnelling atomic force microscopy measurements demonstrate that the individual fibres exhibit appreciable conductivity. The fibres were subsequently incorporated as the active layer in field-effect transistors. The resulting charge carrier mobility strongly depends on both the degree of polymerization of the core-forming block and the fibre length, and is independent of corona composition. The use of uniform, colloidally stable electroactive fibre-like micelles based on common π-conjugated block copolymers highlights their significant potential to provide fundamental insight into charge carrier processes in devices, and to enable future electronic applications.

A Monte Carlo Study of Copolymer Chain Conformations in Dilute Solutions in Good and Selective Solvents

1995 ◽  
Vol 60 (5) ◽  
pp. 736-750
Author(s):  
Tereza Vrbová ◽  
Zuzana Limpouchová ◽  
Karel Procházka
Keyword(s):  
Monte Carlo ◽  
Diblock Copolymers ◽  
Structural Characteristics ◽  
Monte Carlo Study ◽  
Dilute Solutions ◽  
Copolymer Chain ◽  
Selective Solvents ◽  
Nearest Neighbours ◽  
Lattice Distance ◽  
Chain Conformations

Conformations of symmetric diblock copolymers AB in dilute solutions in good and selective solvents were studied by Monte Carlo simulations on a simple cubic lattice. Individual chain conformations were created by the self-avoiding walk algorithm. A modified thermal equilibration of the system based on the Metropolis acceptance criteria for energies of the system and the Rosenbluth weights of chain conformations was applied. Interactions of the nearest neighbours (r = l), where l is the lattice distance, and interactions for r = sqrt(2l) and r = sqrt(3l) were considered. Various structural characteristics of the whole copolymer chain and individual blocks A, B were obtained in the course of computer simulations. It was found that a moderate contraction of the worse soluble block B and a certain segregation of blocks occurs in dilute solutions in selective solvents for the block A, however neither that contraction, nor the segregation of blocks are extensive.

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