scholarly journals Fabrication of low-fouling, high-loading polymeric surfaces through pH-controlled RAFT

RSC Advances ◽  
2020 ◽  
Vol 10 (34) ◽  
pp. 20302-20312
Author(s):  
Alexander H. Jesmer ◽  
Vincent Huynh ◽  
Ryan G. Wylie
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
High Loading ◽  
One Pot ◽  
Polymeric Surfaces ◽  
One Pot Synthesis ◽  
Reversible Addition ◽  
Ph Controlled

pH-Controlled surface-reversible addition–fragmentation chain-transfer (S-RAFT) polymerization yields a one-pot synthesis for bimodal polymeric surfaces for improved capture agent immobilization.

scholarly journals One-pot synthesis of block-copolyrotaxanes through controlled rotaxa-polymerization

2017 ◽  
Vol 13 ◽  
pp. 1310-1315 ◽  
Author(s):  
Jessica Hilschmann ◽  
Gerhard Wenz ◽  
Gergely Kali
Keyword(s):  
Chain Transfer ◽  
Triblock Copolymers ◽  
Raft Polymerization ◽  
Aqueous Solubility ◽  
One Pot ◽  
Polymer Backbone ◽  
One Pot Synthesis ◽  
Reversible Addition ◽  
First Time ◽  
Polymerization Conditions

The aqueous reversible addition fragmentation chain-transfer (RAFT) copolymerization of isoprene and bulky comonomers, an acrylate and an acrylamide in the presence of methylated β-cyclodextrin was employed for the first time to synthesize block-copolyrotaxanes. RAFT polymerizations started from a symmetrical bifunctional trithiocarbonate and gave rise to triblock-copolymers where the outer polyacrylate/polyacrylamide blocks act as stoppers for the cyclodextrin rings threaded onto the inner polyisoprene block. Statistical copolyrotaxanes were synthesized by RAFT polymerization as well. RAFT polymerization conditions allow control of the composition as well as the sequence of the constituents of the polymer backbone which further effects the CD content and the aqueous solubility of the polyrotaxane.

One-Pot Hyperbranched Polymer Synthesis Mediated by Reversible Addition Fragmentation Chain Transfer (RAFT) Polymerization

2005 ◽  
Vol 38 (6) ◽  
pp. 2131-2136 ◽  
Author(s):  
Bailing Liu ◽  
Algy Kazlauciunas ◽  
James T Guthrie ◽  
Sébastien Perrier
Keyword(s):  
Hyperbranched Polymer ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymer Synthesis ◽  
One Pot ◽  
Reversible Addition

One-pot polymer brush synthesis via simultaneous isocyanate coupling chemistry and “grafting from” RAFT polymerization

2014 ◽  
Vol 5 (8) ◽  
pp. 2816-2823 ◽  
Author(s):  
S. P. Le-Masurier ◽  
G. Gody ◽  
S. Perrier ◽  
A. M. Granville
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymer Brush ◽  
One Pot ◽  
Reversible Addition ◽  
Raft Agent ◽  
Grafting From

One-pot ‘grafting from’ of polystyrene on polydopamine particles was investigated using a newly developed carbonyl-azide reversible addition–fragmentation chain transfer (RAFT) agent.

Synergistic Interaction Between ATRP and RAFT: Taking the Best of Each World

2009 ◽  
Vol 62 (11) ◽  
pp. 1384 ◽  
Author(s):  
Yungwan Kwak ◽  
Renaud Nicolaÿ ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
Atom Transfer ◽  
Step Method ◽  
One Pot ◽  
Reversible Addition ◽  
Raft Agent ◽  
Recent Developments ◽  
One Step ◽  
Leaving Groups

This review covers recent developments on the combination of atom transfer radical polymerization (ATRP) and reversible addition–fragmentation chain transfer (RAFT) polymerization to produce well controlled (co)polymers. This review discusses the relative reactivity of the R group in ATRP and RAFT, provides a comparison of dithiocarbamate (DC), trithiocarbonate (TTC), dithioester (DTE), and xanthate versus bromine or chlorine, and an optimization of catalyst/ligand selection. The level of control in iniferter polymerization with DC was greatly improved by the addition of a copper complex. New TTC inifers with bromopropionate and bromoisobutyrate groups have been prepared to conduct, concurrently or sequentially, ATRP from Br-end groups, ATRP from the TTC moiety, and RAFT polymerization from the TTC moiety, depending on the combination of monomer and catalyst employed in the reaction. The use of concurrent ATRP/RAFT (or copper-catalyzed RAFT polymerization or ATRP with dithioester leaving groups), resulted in improved control over the synthesis of homo- and block (co)polymers and allowed preparation of well-defined high-molecular-weight polymers exceeding 1 million. Block copolymers that could not be prepared previously have been synthesized by sequential ATRP and RAFT polymerization using a bromoxanthate inifer. A simple, versatile, and one-step method involving atom-transfer radical addition–fragmentation (ATRAF) for the preparation of various chain transfer agents (including DC, DTE, and xanthate) in high purity is discussed and a one-pot, two-step polymerization starting with a RAFT agent synthesized by ATRAF, followed by polymerization, is demonstrated.

scholarly journals Complex multiblock bottle-brush architectures by RAFT polymerization

2017 ◽  
Vol 53 (87) ◽  
pp. 11901-11904 ◽  
Author(s):  
Andrew Kerr ◽  
Matthias Hartlieb ◽  
Joaquin Sanchis ◽  
Timothy Smith ◽  
Sébastien Perrier
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
One Pot ◽  
Reversible Addition ◽  
Bottle Brush ◽  
Grafting From

The combination of the reversible addition fragmentation chain transfer (RAFT) polymerization R-group grafting from approach and RAFT one-pot acrylamide multiblock methodology is used to synthesise complex bottle-brush architectures.

scholarly journals Aqueous one-pot synthesis of well-defined zwitterionic diblock copolymers by RAFT polymerization: an efficient and environmentally-friendly route to a useful dispersant for aqueous pigments

2021 ◽  
Vol 23 (3) ◽  
pp. 1248-1258
Author(s):  
Shannon M. North ◽  
Steven P. Armes
Keyword(s):  
Iron Oxide ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Environmentally Friendly ◽  
Iron Oxide Particles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Highly Effective ◽  
Oxide Particles

An atom-efficient, wholly aqueous one-pot synthesis of zwitterionic diblock copolymers has been devised. Such copolymers can serve as highly effective aqueous dispersants for nano-sized transparent yellow iron oxide particles.

Self-Healing Hydrophobic POSS-functionalized Fluorinated Copolymer via RAFT Polymerization and dynamic Diels-Alder Reaction

2021 ◽  
Author(s):  
Siva Ponnupandian ◽  
Prantik Mondal ◽  
Thomas Becker ◽  
Richard Hoogenboom ◽  
Andrew B Lowe ◽  
...  
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
Alder Reaction ◽  
Diels Alder ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Reversible Addition

This investigation reports the preparation of a tailor-made copolymer of furfuryl methacrylate (FMA) and trifluoroethyl methacrylate (TFEMA) via reversible addition-fragmentation chain transfer (RAFT) polymerization. The furfuryl groups of the copolymer...

scholarly journals Nano-Assemblies from Amphiphilic PnBA-b-POEGA Copolymers as Drug Nanocarriers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1164
Author(s):  
Angeliki Chroni ◽  
Thomas Mavromoustakos ◽  
Stergios Pispas
Keyword(s):  
Molecular Weight ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymeric Nanocarriers ◽  
Reversible Addition ◽  
2D Noesy ◽  
Drug Nanocarriers ◽  
Glycol Methyl Ether ◽  
Different Molecular Weight

The focus of this study is the development of highly stable losartan potassium (LSR) polymeric nanocarriers. Two novel amphiphilic poly(n-butyl acrylate)-block-poly(oligo(ethylene glycol) methyl ether acrylate) (PnBA-b-POEGA) copolymers with different molecular weight (Mw) of PnBA are synthesized via reversible addition fragmentation chain transfer (RAFT) polymerization, followed by the encapsulation of LSR into both PnBA-b-POEGA micelles. Based on dynamic light scattering (DLS), the PnBA30-b-POEGA70 and PnBA27-b-POEGA73 (where the subscripts denote wt.% composition of the components) copolymers formed micelles of 10 nm and 24 nm in water. The LSR-loaded PnBA-b-POEGA nanocarriers presented increased size and greater mass nanostructures compared to empty micelles, implying the successful loading of LSR into the inner hydrophobic domains. A thorough NMR (nuclear magnetic resonance) characterization of the LSR-loaded PnBA-b-POEGA nanocarriers was conducted. Strong intermolecular interactions between the biphenyl ring and the butyl chain of LSR with the methylene signals of PnBA were evidenced by 2D-NOESY experiments. The highest hydrophobicity of the PnBA27-b-POEGA73 micelles contributed to an efficient encapsulation of LSR into the micelles exhibiting a greater value of %EE compared to PnBA30-b-POEGA70 + 50% LSR nanocarriers. Ultrasound release profiles of LSR signified that a great amount of the encapsulated LSR is strongly attached to both PnBA30-b-POEGA70 and PnBA27-b-POEGA73 micelles.

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