Self-assembly of monodisperse polymer microspheres from PPQ-b-PEG rod-coil block copolymers in selective solvents

2005 ◽  
Vol 48 (1) ◽  
pp. 42
Author(s):  
Xueao ZHANG
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Polymer Microspheres ◽  
Selective Solvents ◽  
Monodisperse Polymer Microspheres

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.

Self-Assembly of Block Copolymers in Selective Solvents:  Influence of Relative Block Size on Phase Behavior

Langmuir ◽  
2000 ◽  
Vol 16 (17) ◽  
pp. 6839-6846 ◽  
Author(s):  
Birgitta Svensson ◽  
Ulf Olsson ◽  
Paschalis Alexandridis
Keyword(s):  
Block Copolymers ◽  
Phase Behavior ◽  
Self Assembly ◽  
Block Size ◽  
Selective Solvents

Aggregation-induced emission block copolymers based on ring-opening metathesis polymerization

RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51194-51200 ◽  
Author(s):  
Yuming Zhao ◽  
Ying Wu ◽  
Guowei Yan ◽  
Ke Zhang
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Ring Opening ◽  
Water Soluble ◽  
Amphiphilic Block Copolymers ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Aggregation Induced Emission ◽  
Selective Solvents ◽  
First Time

AIE amphiphilic block copolymers were developed from ROMP for the first time. By self-assembly in selective solvents, water soluble fluorescent nano-objects were prepared with varied structures including micelles and vesicles.

scholarly journals The role of cooling rate in crystallization-driven block copolymer self-assembly

2021 ◽  
Author(s):  
Shaofei Song ◽  
Jingjie Jiang ◽  
Ehsan Nikbin ◽  
Jane Howe ◽  
Ian Manners ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Cooling Rate ◽  
Self Assembly ◽  
Selective Solvents

Self-assembly of crystalline-coil block copolymers (BCPs) in selective solvents is often carried out by heating the mixture until the sample appears to dissolve and then allowing the solution to cool...

scholarly journals Micellization Behaviour of Linear and Nonlinear Block Copolymers Based on Poly(n-hexyl isocyanate) in Selective Solvents

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1678
Author(s):  
Aggelos Vazaios ◽  
Athanasios Touris ◽  
Mikel Echeverria ◽  
Georgia Zorba ◽  
Marinos Pitsikalis
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Structural Parameters ◽  
The Self ◽  
Copolymer Composition ◽  
Force Microscopy ◽  
Selective Solvents ◽  
Atomic Force ◽  
Spherical Micelles ◽  
Macromolecular Architecture

Block copolymers have attracted significant scientific and economic interest over the last decades due to their ability to self-assemble into ordered structures both in bulk and in selective solvents. In this work, the self-assembly behaviour of both linear (diblocks, triblocks and pentablocks) and nonlinear (miktoarm stars and a block-graft) copolymers based on poly(n-hexyl isocyanate), PHIC, were studied in selective solvents such as n-heptane and n-dodecane. A variety of experimental techniques, namely static and dynamic light scattering, dilute solution viscometry and atomic force microscopy, were employed to study the micellar structural parameters (e.g., aggregation number, overall micellar size and shape, and core and shell dimensions). The effect of the macromolecular architecture, the molecular weight and the copolymer composition on the self-assembly behaviour was studied. Spherical micelles in equilibrium with clusters were obtained from the block copolymers. Thermally stable, uniform and spherical aggregates were found from the triblock copolymers. The poly(n-hexyl isocyanate)-b-polyisoprene-b-poly(n-hexyl isocyanate),-HIH copolymers tend to adopt closed loop conformation, leading to more elongated cylindrical-type structures upon increasing the concentration. Clustering effects were also reported in the case of the pentablock terpolymers. The topology of the blocks plays an important role, since the poly(n-hexyl isocyanate)-b-polystyrene-b-polyisoprene-b-polystyrene-b-poly(n-hexyl isocyanate), HSISH terpolymer shows intermicellar fusion of spherical micelles, leading to the formation of extended networks. The formation of spherical micelles in equilibrium with clusters was obvious in the case of the miktoarm stars, whereas the block-graft copolymer shows the existence of mainly unimolecular micelles.

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