scholarly journals Preparation of well-defined 2D-lenticular aggregates by self-assembly of PNIPAM-b-PVDF amphiphilic diblock copolymers in solution

2021 ◽  
Author(s):  
Enrique Folgado ◽  
Matthias Mayor ◽  
Didier Cot ◽  
Michel Ramonda ◽  
Franck Godiard ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Dimethyl Carbonate ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Amphiphilic Diblock Copolymers

PNIPAM-b-PVDF amphiphilic block copolymers were synthesized via RAFT polymerization in dimethyl carbonate. These block copolymers were able to self-assemble into various morphologies such as spherical, crumpled, lamellar and lenticular 2D aggregates.

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...

1998 E.W.R. Steacie Award Lecture Asymmetric amphiphilic block copolymers in solution: a morphological wonderland

1999 ◽  
Vol 77 (8) ◽  
pp. 1311-1326 ◽  
Author(s):  
Neil S Cameron ◽  
Muriel K Corbierre ◽  
Adi Eisenberg
Keyword(s):  
Self Assembly ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Polymer Composition ◽  
Selective Solvents ◽  
Thermodynamic And Kinetic Parameters ◽  
Amphiphilic Diblock Copolymers ◽  
Systematic Understanding ◽  
Selection Of ◽  
Qualitative Discussion

Asymmetric amphiphilic diblock copolymers self-assemble in selective solvents. Since 1995, when we first reported the systematic preparation of a sequence of various "crew-cut" aggregate morphologies from this class of copolymer in solution (1), we have identified a vast array of structures and have begun a detailed investigation of the thermodynamic and kinetic parameters that induce morphogenesis. Not only spheres, rods, bilayer and bicontinuous architectures, as well as inverted structures are observed, but also a selection of mixed, combined and much more complex aggregates is documented. All of these aggregates have a phase-separated insoluble core and a crew-cut soluble corona. Thus, all parameters that permit selective modification of the component of either phase or of the interface provide a window for morphological control. By carefully adjusting the polymer chain environment, it has been possible to develop a systematic understanding of morphogenic parameters, which include, among others, polymer composition, common solvent, initial concentration, temperature, type and concentration of added ions, method of preparation, and added homopolymer. To date, more than 30 publications have appeared in the literature from our group alone on this subject. One of the problems inherent with such a complicated system is the taxonomy or classification: which morphologies correspond to equilibrium positions and which are intermediate or trapped? An attempt at a logical presentation of the observed aggregates is given, preceded by a qualitative discussion of the thermodynamic framework for this system. Where possible, the transitions between morphologies are explained in the context of the thermodynamic parameters. Finally, parallels are drawn between the copolymer aggregates and biological architectures.Key words: crew-cut, morphology, block copolymer, self-assembly, amphiphile.

Synthesis and self-assembly behaviors of three-armed amphiphilic block copolymers via RAFT polymerization

Polymer ◽  
2008 ◽  
Vol 49 (21) ◽  
pp. 4569-4575 ◽  
Author(s):  
Weidong Zhang ◽  
Wei Zhang ◽  
Nianchen Zhou ◽  
Zhenping Cheng ◽  
Jian Zhu ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers

scholarly journals Fully amorphous atactic and isotactic block copolymers and their self-assembly into nano- and microscopic vesicles

2021 ◽  
Vol 12 (37) ◽  
pp. 5377-5389
Author(s):  
Riccardo Wehr ◽  
Elena C. dos Santos ◽  
Moritz S. Muthwill ◽  
Vittoria Chimisso ◽  
Jens Gaitzsch ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Membrane Properties ◽  
Giant Unilamellar Vesicles ◽  
Unilamellar Vesicles ◽  
Amphiphilic Diblock Copolymers

Analysis of the membrane properties and stability of fully amorphous small and giant unilamellar vesicles composed of atactic or isotactic poly(butylene oxide)-block-poly(glycidol) (PBO-b-PG) amphiphilic diblock copolymers.

scholarly journals Selenol-Based Nucleophilic Reaction for the Preparation of Reactive Oxygen Species-Responsive Amphiphilic Diblock Copolymers

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 827
Author(s):  
Xiaowei An ◽  
Weihong Lu ◽  
Jian Zhu ◽  
Xiangqiang Pan ◽  
Xiulin Zhu
Keyword(s):  
Reactive Oxygen Species ◽  
Molecular Weight ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Amphiphilic Copolymers ◽  
Nucleophilic Reaction ◽  
Amphiphilic Diblock Copolymers

Selenide-containing amphiphilic copolymers have shown significant potential for application in drug release systems. Herein, we present a methodology for the design of a reactive oxygen species-responsive amphiphilic diblock selenide-labeled copolymer. This copolymer with controlled molecular weight and narrow molecular weight distribution was prepared by sequential organoselenium-mediated reversible addition fragmentation chain transfer (Se-RAFT) polymerization and selenol-based nucleophilic reaction. Nuclear magnetic resonance (NMR) and matrix-assisted laser desorption/ionization time-to-flight (MALDI-TOF) techniques were used to characterize its structure. Its corresponding nanomicelles successfully formed through self-assembly from the copolymer itself. Such nanomicelles could rapidly disassemble under oxidative conditions due to the fragmentation of the Se–C bond. Therefore, this type of nanomicelle based on selenide-labeled amphiphilic copolymers potentially provides a new platform for drug delivery.

Amphiphilic diblock copolymers based on sucrose methacrylate: RAFT polymerization and self-assembly

2018 ◽  
Vol 266 ◽  
pp. 628-639 ◽  
Author(s):  
Raphael Henrique Marques Marcilli ◽  
Ana Paula Rodrigues Camilo ◽  
Cesar Liberato Petzhold ◽  
Maria Isabel Felisberti
Keyword(s):  
Self Assembly ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Amphiphilic Diblock Copolymers

Synthesis and Solution-state Assembly or Bulk State Thiol-ene Crosslinking of Pyrrolidinone- and Alkene-functionalized Amphiphilic Block Fluorocopolymers: From Functional Nanoparticles to Anti-fouling Coatings

2010 ◽  
Vol 63 (8) ◽  
pp. 1159 ◽  
Author(s):  
Jun Ma ◽  
Jeremy W. Bartels ◽  
Zhou Li ◽  
Ke Zhang ◽  
Chong Cheng ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Building Blocks ◽  
Ene Reactions ◽  
Reversible Addition ◽  
Complex Building ◽  
Crosslinked Networks ◽  
Amphiphilic Diblock Copolymers ◽  
Synthetic Methodologies

With an ever increasing interest in the combined functionality and versatility of materials, increasing demands are placed on synthetic methodologies by which to produce such materials. This work demonstrates the preparation of block copolymers having fluorocarbon content, pyrrolidinone units, and alkene groups as complex building blocks for the assembly of discrete nanoparticles in solution and, alternatively, transformation into sophisticated crosslinked networks. Reversible addition–fragmentation chain transfer (RAFT) polymerization is a facile tool for the synthesis of well-defined polymers containing imbedded side-chain functionalities. In this work, the synthesis of well-defined multifunctional fluorinated polymers bearing pendant pyrrolidinone groups, and block copolymers bearing both pyrrolidinone and alkenyl groups on different segments was achieved, by using RAFT polymerizations of unique bifunctional monomers. Upon micellization, the amphiphilic diblock copolymers were transformed into regioselectively-functionalized nanoparticles. Further transformations of pyrrolidinone- and alkene-dual functionalized-block copolymers into complex amphiphilic networks were accomplished by highly efficient UV-induced thiol-ene reactions. Whether as discrete nanoparticles or nanoscopically-segregated crosslinked networks, these materials have great potential for several diverse technologies, including as anti-fouling materials.

scholarly journals Synthesis of Terpyridine-Terminated Amphiphilic Block Copolymers and Their Self-Assembly into Metallo-Polymer Nanovesicles

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 601 ◽  
Author(s):  
Tatyana Elkin ◽  
Stacy Copp ◽  
Ryan Hamblin ◽  
Jennifer Martinez ◽  
Gabriel Montaño ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Block Copolymers ◽  
Self Assembly ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Transmission Electron ◽  
Reversible Addition ◽  
Efficient Route ◽  
High Yields

Polystyrene-b-polyethylene glycol (PS-b-PEG) amphiphilic block copolymers featuring a terminal tridentate N,N,N-ligand (terpyridine) were synthesized for the first time through an efficient route. In this approach, telechelic chain-end modified polystyrenes were produced via reversible addition-fragmentation chain-transfer (RAFT) polymerization by using terpyridine trithiocarbonate as the chain-transfer agent, after which the hydrophilic polyethylene glycol (PEG) block was incorporated into the hydrophobic polystyrene (PS) block in high yields via a thiol-ene process. Following metal-coordination with Mn2+, Fe2+, Ni2+, and Zn2+, the resulting metallo-polymers were self-assembled into spherical, vesicular nanostructures, as characterized by dynamic light scattering and transmission electron microscopy (TEM) imaging.

Engineering of pH-triggered nanoplatforms based on novel poly(2-methyl-2-oxazoline)-b-poly[2-(diisopropylamino)ethyl methacrylate] diblock copolymers with tunable morphologies for biomedical applications

2021 ◽  
Author(s):  
Peter Černoch ◽  
Alessandro Jäger ◽  
Zulfia Cernochova ◽  
Vladimir Sincari ◽  
Lindomar Calumby Albuquerque ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ring Opening ◽  
Biomedical Applications ◽  
Diblock Copolymers ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Synthetic Approach ◽  
Ethyl Methacrylate ◽  
Reversible Addition

A two-step synthetic approach via the combination of living cationic ring-opening (CROP) and reversible addition-fragmentation chain transfer (RAFT) polymerization techniques was used to produce novel amphiphilic block copolymers based on...

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