Defect structures and ordering behaviours of diblock copolymers self-assembling on spherical substrates

Soft Matter ◽  
2014 ◽  
Vol 10 (35) ◽  
pp. 6713-6721 ◽  
Author(s):  
Liangshun Zhang ◽  
Liquan Wang ◽  
Jiaping Lin
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Lamellar Phase ◽  
Defect Structures ◽  
Self Assembling ◽  
Cylindrical Phase

The Landau–Brazovskii theory is employed to explore defect structures and ordering behaviors of block copolymers confined on spherical substrates. Isolated disclinations and scars are formed in the cylindrical phase. The defect structures of hedgehog, spiral and quasi-baseball are produced in the lamellar phase.

Amphiphilic Diblock Copolymers of Poly(glycidol) with Biodegradable Polyester/Polycarbonate. Organocatalytic One-Pot ROP and Self-Assembling Property

2021 ◽  
Author(s):  
Tingyu He ◽  
Atsushi Narumi ◽  
Yanqiu Wang ◽  
Liang Xu ◽  
Shin-ichiro Sato ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Synthetic Method ◽  
Biodegradable Polyester ◽  
One Pot ◽  
Self Assembling ◽  
Amphiphilic Diblock Copolymers

A synthetic method for a series of poly(glycidol) (PG)-based amphiphilic block copolymers is presented with an emphasis on the catalyst switch method from an organic superbase (t-Bu-P4) to another with...

scholarly journals Rotation Dynamics of Star Block Copolymers under Shear Flow

2018 ◽  
Author(s):  
Diego Jaramillo-Cano ◽  
Christos N. Likos ◽  
Manuel Camargo
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Building Blocks ◽  
Laboratory Frame ◽  
Rotational Frequency ◽  
Geometrical Approach ◽  
Soft Systems ◽  
Self Assembling ◽  
Star Block Copolymers ◽  
Physical And Chemical

Star block-copolymers (SBCs) are macromolecules formed by a number of diblock copolymers anchored to a common central core, being the internal monomers solvophilic and the end monomers solvophobic. Recent studies have demonstrated that SBCs constitute a self-assembling building blocks with specific softness, functionalization, shape, and flexibility. Depending on different physical and chemical parameters the SBCs can behave as flexible patchy particles. In this paper, we study the rotational dynamics of isolated SBCs using a hybrid mesoscale simulation technique. We compare three different approaches to analyse the dynamics: the laboratory frame, the non-inertial Eckart's frame, and a geometrical approximation relating the conformation of the SBC to the velocity profile of the solvent. We find that the geometrical approach is adequate when dealing with very soft systems while in the opposite extreme, the dynamics is best explained using the laboratory frame. On the other hand, the Eckart frame is found to be very general and to reproduced well both extreme cases. We also compare the rotational frequency and the kinetic energy with the definitions of the angular momentum and inertia tensor different from recent publications.

scholarly journals Rotation Dynamics of Star Block Copolymers under Shear Flow

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 860 ◽  
Author(s):  
Diego Jaramillo-Cano ◽  
Christos Likos ◽  
Manuel Camargo
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Building Blocks ◽  
Laboratory Frame ◽  
Rotational Frequency ◽  
Geometrical Approach ◽  
Soft Systems ◽  
Self Assembling ◽  
Star Block Copolymers ◽  
Physical And Chemical

Star block-copolymers (SBCs) are macromolecules formed by a number of diblock copolymers anchored to a common central core, being the internal monomers solvophilic and the end monomers solvophobic. Recent studies have demonstrated that SBCs constitute self-assembling building blocks with specific softness, functionalization, shape and flexibility. Depending on different physical and chemical parameters, the SBCs can behave as flexible patchy particles. In this paper, we study the rotational dynamics of isolated SBCs using a hybrid mesoscale simulation technique. We compare three different approaches to analyze the dynamics: the laboratory frame, the non-inertial Eckart’s frame and a geometrical approximation relating the conformation of the SBC to the velocity profile of the solvent. We find that the geometrical approach is adequate when dealing with very soft systems, while in the opposite extreme, the dynamics is best explained using the laboratory frame. On the other hand, the Eckart frame is found to be very general and to reproduced well both extreme cases. We also compare the rotational frequency and the kinetic energy with the definitions of the angular momentum and inertia tensor from recent publications.

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

2019 ◽  
Author(s):  
Jacob Ishibashi ◽  
Yan Fang ◽  
Julia Kalow
Keyword(s):  
Block Copolymers ◽  
Rheological Properties ◽  
Diblock Copolymers ◽  
Cross Linking ◽  
Statistical Copolymer

<p>Block copolymers are used to construct covalent adaptable networks that employ associative exchange chemistry (vitrimers). The resulting vitrimers display markedly different nanostructural, thermal and rheological properties relative to those of their statistical copolymer-derived counterparts. This study demonstrates that prepolymer sequence is a versatile strategy to modify the properties of vitrimers.</p>

Self-crosslinking assemblies with tunable nanostructures from photoresponsive polypeptoid-based block copolymers

2020 ◽  
Vol 11 (2) ◽  
pp. 337-343 ◽  
Author(s):  
Jirui Wei ◽  
Jing Sun ◽  
Xu Yang ◽  
Sifan Ji ◽  
Yuhan Wei ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
New Family

A series of reversible crosslinking assemblies with tunable morphologies are obtained from a new family of photoresponsive polypeptoid-based diblock copolymers.

Synthesis, characterization and association behavior of linear-dendritic amphiphilic diblock copolymers based on poly(ethylene oxide) and a dendron derived from 2,2′-bis(hydroxymethyl)propionic acid

2015 ◽  
Vol 6 (12) ◽  
pp. 2274-2282 ◽  
Author(s):  
Weiwei Zhang ◽  
Weiwei Jiang ◽  
Delong Zhang ◽  
Guangyue Bai ◽  
Pengxiao Lou ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Propionic Acid ◽  
Diblock Copolymers ◽  
Association Behavior ◽  
Poly Ethylene Oxide ◽  
Amphiphilic Diblock Copolymers ◽  
Poly Ethylene

Two new amphiphilic linear-dendritic block copolymers have been synthesized and characterized. And their association behaviors have also been studied.

Dilute Solutions of Block Copolymers. 1. Diblock Copolymers

1998 ◽  
Vol 31 (13) ◽  
pp. 4342-4349 ◽  
Author(s):  
O. F. Olaj ◽  
B. Neubauer ◽  
G. Zifferer
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Dilute Solutions

scholarly journals A controlled synthesis method of alkyl methacrylate block copolymers via living anionic polymerization at ambient temperature

RSC Advances ◽  
2019 ◽  
Vol 9 (28) ◽  
pp. 16049-16056 ◽  
Author(s):  
Zheng Li ◽  
Jianding Chen ◽  
Guijin Zou ◽  
Tongyuan Zhang ◽  
Dafu Wei ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ambient Temperature ◽  
Anionic Polymerization ◽  
Diblock Copolymers ◽  
Synthesis Method ◽  
Controlled Synthesis ◽  
Living Anionic Polymerization ◽  
Alkyl Methacrylate ◽  
High Yields

A series of well-defined diblock copolymers containing PMMA, PEMA and PBMA blocks were synthesized with narrow MWDs and high yields via anionic polymerization, while t-BuOK was selected as initiator in THF at 0 °C. .

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