Microphase separation in poly(isoprene-b-ethylene oxide) diblock copolymer melts. I. Phase state and kinetics of the order-to-order transitions

1999 ◽  
Vol 110 (1) ◽  
pp. 652-663 ◽  
Author(s):  
G. Floudas ◽  
R. Ulrich ◽  
U. Wiesner
Keyword(s):  
Ethylene Oxide ◽  
Diblock Copolymer ◽  
Phase State ◽  
Microphase Separation ◽  
Copolymer Melts ◽  
Kinetics Of

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.

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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