Self-Assembly of Poly(ferrocenyldimethylsilane-b-methyl methacrylate) Block Copolymers in a Selective Solvent

2006 ◽  
Vol 39 (6) ◽  
pp. 2306-2315 ◽  
Author(s):  
Igor Korczagin ◽  
Mark A. Hempenius ◽  
Remco G. Fokkink ◽  
Martien A. Cohen Stuart ◽  
Mahmoud Al-Hussein ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Self Assembly ◽  
Selective Solvent

scholarly journals Cylindrical Micelles by the Self-Assembly of Crystalline-b-Coil Polyphosphazene-b-P2VP Block Copolymers. Stabilization of Gold Nanoparticles

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1772 ◽  
Author(s):  
Maria de los Angeles Cortes ◽  
Raquel de la Campa ◽  
Maria Luisa Valenzuela ◽  
Carlos Díaz ◽  
Gabino A. Carriedo ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Block Copolymers ◽  
Self Assembly ◽  
Cationic Polymerization ◽  
The Self ◽  
The Novel ◽  
Selective Solvent ◽  
The Core ◽  
Cylindrical Micelles ◽  
Main Factor

During the last number of years a variety of crystallization-driven self-assembly (CDSA) processes based on semicrystalline block copolymers have been developed to prepare a number of different nanomorphologies in solution (micelles). We herein present a convenient synthetic methodology combining: (i) The anionic polymerization of 2-vinylpyridine initiated by organolithium functionalized phosphane initiators; (ii) the cationic polymerization of iminophosphoranes initiated by –PR2Cl2; and (iii) a macromolecular nucleophilic substitution step, to prepare the novel block copolymers poly(bistrifluoroethoxy phosphazene)-b-poly(2-vinylpyridine) (PTFEP-b-P2VP), having semicrystalline PTFEP core forming blocks. The self-assembly of these materials in mixtures of THF (tetrahydrofuran) and 2-propanol (selective solvent to P2VP), lead to a variety of cylindrical micelles of different lengths depending on the amount of 2-propanol added. We demonstrated that the crystallization of the PTFEP at the core of the micelles is the main factor controlling the self-assembly processes. The presence of pyridinyl moieties at the corona of the micelles was exploited to stabilize gold nanoparticles (AuNPs).

Synthesis and Self-Assembly of Poly(diethylhexyloxy-p-phenylenevinylene)-b-poly(methyl methacrylate) Rod−Coil Block Copolymers

2009 ◽  
Vol 42 (12) ◽  
pp. 4208-4219 ◽  
Author(s):  
Chun-Chih Ho ◽  
Yi-Huan Lee ◽  
Chi-An Dai ◽  
Rachel A. Segalman ◽  
Wei-Fang Su
Keyword(s):  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Self Assembly ◽  
Poly Methyl Methacrylate

scholarly journals Self-Assembly Investigations of Sulfonated Poly(methyl methacrylate-block-styrene) Diblock Copolymer Thin Films

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Claudia Piñón-Balderrama ◽  
César Leyva-Porras ◽  
Roberto Olayo-Valles ◽  
Javier Revilla-Vázquez ◽  
Ulrich S. Schubert ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Self Assembly ◽  
Volume Fraction ◽  
Degree Of Polymerization ◽  
Solvent Vapor ◽  
Poly Methyl Methacrylate ◽  
Force Microscopy ◽  
Atomic Force

Poly(methyl methacrylate-block-styrene) block copolymers (BCs) of low dispersity were selectively sulfonated on the styrenic segment. Several combinations of degree of polymerization and volume fraction of each block were investigated to access different self-assembled morphologies. Thin films of the sulfonated block copolymers were prepared by spin-coating and exposed to solvent vapor (SVA) or thermal annealing (TA) to reach equilibrium morphologies. Atomic force microscopy (AFM) was employed for characterizing the films, which exhibited a variety of nanometric equilibrium and nonequilibrium morphologies. Highly sulfonated samples revealed the formation of a honeycomb-like morphology obtained in solution rather than by the self-assembly of the BC in the solid state. The described morphologies may be employed in applications such as templates for nanomanufacturing and as cover and binder of catalytic particles in fuel cells.

Synthesis of Block Terpolymer PS-PDMAEMA-PMMA via ATRP and its Self-Assembly in Selective Solvents

2014 ◽  
Vol 1049-1050 ◽  
pp. 137-141
Author(s):  
Wei Zhang ◽  
Jin Xin He ◽  
Qiong Liu ◽  
Gang Qiang Ke ◽  
Xia Dong
Keyword(s):  
Methyl Methacrylate ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Self Assembly ◽  
Atom Transfer ◽  
Selective Solvent ◽  
Poly Methyl Methacrylate ◽  
Molecular Weights ◽  
Dimethylaminoethyl Methacrylate ◽  
Selective Solvents

Well-defined triblock terpolymer polystyrene-block-poly (N,N-Dimethylaminoethyl methacrylate)-block-poly (methyl methacrylate) (PS-PDMAEMA-PMMA) is synthesized via sequential Atom transfer radical polymerization (ATRP) with designed molecular weights characterized by HNMR and GPC. Annealing in Chloroform which is a selective solvent for PS and PMMA induces the formation of micelles with patchy coronas, and subsequent dialysis against cyclohexane which is selective only for PS enables the stacking of the precursor micelles into core-compartmentalized self-assemblies. The micellizatinon and self-assembly behaviors are investigated via DLS and TEM.

A DISSIPATIVE PARTICLE DYNAMICS STUDY ON THE MORPHOLOGIES OF H-SHAPED BLOCK COPOLYMERS IN SOLVENT

2011 ◽  
Vol 25 (06) ◽  
pp. 843-850
Author(s):  
XI SHAO ◽  
KAI YANG ◽  
YU-QIANG MA
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
The Self ◽  
Selective Solvent ◽  
Convenient Approach ◽  
Multicompartment Micelles ◽  
Dynamics Method

Multicompartment micelles have advanced applications in biological and pharmaceutical fields. The self-assembly of the block copolymers with different chain architectures provides versatile and powerful routes to obtain multicompartment micelles in water. Here we apply the dissipative particle dynamics method to study the self-assembly of H-shaped triblock copolymers in a selective solvent. It is found that the H-shaped triblock copolymers can form micelles with different morphologies, such as worm-like micelles, hamburger micelles, core-shell-corona micelles, and cylinder micelles, etc. Among them, the cylinder micelles have not been reported before in the case of the copolymers with similar chain architecture (e.g., Y-shaped copolymer). We demonstrate a convenient approach to obtain different morphologies by only adjusting the arrangement of the copolymers' blocks. These results may be helpful for the design of multicompartment micelles for various application purposes.

scholarly journals Self-Assembly of Bottlebrush Block Copolymers in Selective Solvent: Micellar Structures

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1351
Author(s):  
Inna O. Lebedeva ◽  
Ekaterina B. Zhulina ◽  
Oleg V. Borisov
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Aggregation Number ◽  
Side Chains ◽  
Core Size ◽  
Selective Solvent ◽  
Selective Solvents ◽  
Consistent Field ◽  
Self Consistent Field ◽  
Good Agreement

Block copolymers comprising chemically different bottlebrush blocks can self-assemble in selective solvents giving rise to micellar-like solution nanostructures. The self-consistent field theoretical approach is used for predicting relation between architectural parameters of both bottlebrush blocks (polymerization degrees of the main and side chains, density of grafting of the side chains to the backbone) and structural properties of micelles as well as critical micelle concentration (CMC). As predicted by the theory, replacement of linear blocks by bottlebrush ones with the same degrees of polymerization results in a decrease in the micellar core size (in aggregation number) and extension of the corona, whereas the CMC increases. These theoretical findings are in good agreement with results of computer simulations.

Self-Assembly of Hydrogels From Elastin-Mimetic Block Copolymers

2002 ◽  
Vol 724 ◽  
Author(s):  
Elizabeth R. Wright ◽  
R. Andrew McMillan ◽  
Alan Cooper ◽  
Robert P. Apkarian ◽  
Vincent P. Conticello
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Variable Temperature ◽  
Inverse Temperature ◽  
Temperature Transition ◽  
Scanning Calorimetry ◽  
Design Synthesis ◽  
Inverse Temperature Transition ◽  
Functional Biomaterials

AbstractTriblock copolymers have traditionally been synthesized with conventional organic components. However, triblock copolymers could be synthesized by the incorporation of two incompatible protein-based polymers. The polypeptides would differ in their hydrophobicity and confer unique physiochemical properties to the resultant materials. One protein-based polymer, based on a sequence of native elastin, that has been utilized in the synthesis of biomaterials is poly (Valine-Proline-Glycine-ValineGlycine) or poly(VPGVG) [1]. This polypeptide has been shown to have an inverse temperature transition that can be adjusted by non-conservative amino acid substitutions in the fourth position [2]. By combining polypeptide blocks with different inverse temperature transition values due to hydrophobicity differences, we expect to produce amphiphilic polypeptides capable of self-assembly into hydrogels. Our research examines the design, synthesis and characterization of elastin-mimetic block copolymers as functional biomaterials. The methods that are used for the characterization include variable temperature 1D and 2D High-Resolution-NMR, cryo-High Resolutions Scanning Electron Microscopy and Differential Scanning Calorimetry.

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