Theoretical study of polymeric mixtures with different sequence statistics. II. Brazovskii class: Linear random copolymers with diblock copolymers

2000 ◽  
Vol 112 (3) ◽  
pp. 1598-1605 ◽  
Author(s):  
Shuyan Qi ◽  
Arup K. Chakraborty
Keyword(s):  
Diblock Copolymers ◽  
Theoretical Study ◽  
Random Copolymers

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

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

Theoretical study on tailoring symmetric and asymmetric thin films of diblock copolymers

2009 ◽  
Vol 255 (11) ◽  
pp. 5775-5780 ◽  
Author(s):  
Dapeng Cao ◽  
Xianren Zhang ◽  
Wenchuan Wang
Keyword(s):  
Thin Films ◽  
Diblock Copolymers ◽  
Theoretical Study

Microphase separation in the melts of diblock copolymers with amphiphilic blocks

Soft Matter ◽  
2021 ◽  
Vol 17 (1) ◽  
pp. 90-101
Author(s):  
Dmitry A. Filatov ◽  
Elena N. Govorun
Keyword(s):  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Theoretical Study ◽  
Microphase Separation ◽  
Amphiphilic Polymer ◽  
Copolymer Melts

Amphiphilic polymer blocks can envelop the domains of major non-amphiphilic blocks in diblock copolymer melts: a theoretical study.

Cylindrical Micelles in Rigid-Flexible Diblock Copolymers

1991 ◽  
Vol 248 ◽  
Author(s):  
D.R.M Williams ◽  
G.H. Fredrickson
Keyword(s):  
Phase Diagram ◽  
Diblock Copolymers ◽  
Theoretical Study ◽  
Flexible Tail ◽  
Cylindrical Micelles ◽  
Rigid Rod ◽  
Spherical Micelles

AbstractWe present a theoretical study of a melt of diblock copolymers consisting of a rigid rod and a flexible tail. It is shown that in addition to the lamellax phases previously discussed, there also exist phases of “hockey puck” micelles, where the rods are packed axially into cylinders. These phases occupy most of the phase diagram previously thought to consist of monolayer lamellae. It is argued that spherical micelles probably do not exist.

Electron microscopy of crystalline structure in thermotropic random copolymers

1991 ◽  
Vol 49 ◽  
pp. 1054-1055
Author(s):  
Afzana Anwer ◽  
S. Eilidh Bedford ◽  
Richard J. Spontak ◽  
Alan H. Windle
Keyword(s):  
Electron Microscopy ◽  
Crystalline Structure ◽  
Liquid Crystalline ◽  
Elevated Temperatures ◽  
Random Copolymers ◽  
Molecular Characteristics ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Identical Monomer ◽  
Periodic Layer

Random copolyesters composed of wholly aromatic monomers such as p-oxybenzoate (B) and 2,6-oxynaphthoate (N) are known to exhibit liquid crystalline characteristics at elevated temperatures and over a broad composition range. Previous studies employing techniques such as X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) have conclusively proven that these thermotropic copolymers can possess a significant crystalline fraction, depending on molecular characteristics and processing history, despite the fact that the copolymer chains possess random intramolecular sequencing. Consequently, the nature of the crystalline structure that develops when these materials are processed in their mesophases and subsequently annealed has recently received considerable attention. A model that has been consistent with all experimental observations involves the Non-Periodic Layer (NPL) crystallite, which occurs when identical monomer sequences enter into register between adjacent chains. The objective of this work is to employ electron microscopy to identify and characterize these crystallites.

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