Microphase Separation in Starblock Copolymer Melts

1994 ◽  
Vol 27 (23) ◽  
pp. 6761-6767 ◽  
Author(s):  
M. W. Matsen ◽  
M. Schick
Keyword(s):  
Microphase Separation ◽  
Copolymer Melts

Block Copolymers: Thermodynamics, Dynamics, and Small-Angle Scattering

2015 ◽  
Author(s):  
Lee M. Trask ◽  
Nacu Hernandez ◽  
Eric W. Cochran
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Small Angle ◽  
Self Assembly ◽  
Microphase Separation ◽  
Small Angle Scattering ◽  
Angle Scattering ◽  
Copolymer Melts ◽  
Shear Processing ◽  
Kinetics Of

This article explores the dynamics, thermodynamics, and small-angle scattering of block copolymers. The goal is to determine what drives the applications of block copolymers, i.e. how block copolymers behave and how they are characterized. The article begins with a summary of the experimental data and various theories that comprise our understanding of block copolymer thermodynamics, with particular emphasis on phase behavior and especially the theory of microphase separation. It then considers topics related to block copolymer dynamics, including diffusion, viscoelasticity and rheology, shear-processing, and the kinetics of self-assembly. It also discusses small-angle scattering techniques as applied to block copolymer characterization, including scattering from ordered block copolymer melts.

“Aggregation in Block Copolymer Solutions”

1989 ◽  
Vol 177 ◽  
Author(s):  
M. Olvera de la Cruz
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Solvent Effects ◽  
Microphase Separation ◽  
New Materials ◽  
Ordered Structures ◽  
Copolymer Concentration ◽  
Semidilute Solutions ◽  
Copolymer Melts ◽  
Block Sizes

ABSTRACTThe ability to produce block copolymers has led to new materials with unique properties. The chemical connectivity of incompatible blocks forces segregation to occur at distances of the order of the block sizes. In block copolymer melts, the segregated domains form periodic ordered structures called microphases. Most block copolymers are strongly incompatible. In such cases, in order to ensure equilibrium microphase separated samples, the microphases are prepared from solution. Microphase separation in semidilute solutions of block copolymers in nonselective good solvent is analyzed. The solvent effects on the thermodynamics in the weak segregation limit are discussed. The concentration of block copolymer at the transition in good solvents, scales as φtN−.62and in ϑ solvents as N−.5. The transitions between microphase morphologies as a function of block copolymer concentration are studied.

Microphase separation in helix-coil block copolymer melts: computer simulation

Soft Matter ◽  
2021 ◽  
Author(s):  
Mikhail K. Glagolev ◽  
Anna A Glagoleva ◽  
Valentina V Vasilevskaya
Keyword(s):  
Molecular Dynamics ◽  
Computer Simulation ◽  
Molecular Dynamics Simulation ◽  
Block Copolymer ◽  
Microphase Separation ◽  
Dynamics Simulation ◽  
Copolymer Melts

By means of molecular dynamics simulation, the process of the microphase separation in the melts of diblock helix-coil copolymers comprising a flexible and a helical block was studied. The resulting...

scholarly journals Simulation Study of Process-Controlled Supramolecular Block Copolymer Phase Separation with Reversible Reaction Algorithm

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 528
Author(s):  
Jian-Bo Wu ◽  
Hong Liu ◽  
Zhong-Yuan Lu
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Microphase Separation ◽  
Dynamic Properties ◽  
Dissipative Particle Dynamics ◽  
Reversible Reaction ◽  
Stimuli Responsive ◽  
Assembly Mechanism ◽  
Copolymer Melts ◽  
Non Equilibrium

A supramolecular diblock copolymer formed by reversible bonds between the two blocks shows a rich microphase separation behavior and has great application potential in stimuli-responsive materials. We propose a novel method to describe supramolecular reactions in dissipative particle dynamics, which includes a reversible reaction to accurately reproduce the strength, saturation, and dynamic properties of the reversible bonds in the simulations. The thermodynamic properties and dynamic processes of the supramolecular diblock copolymer melts in both equilibrium and non-equilibrium states were studied using this method. The simulation results show that the method can faithfully characterize phase behaviors and dynamic properties of supramolecular diblock copolymer melts, especially in a non-equilibrium state, which provides a novel tool to unveil self-assembly mechanism and describe the properties of supramolecular block copolymers.

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