Combining Ring-Opening Multibranching and RAFT Polymerization: Multifunctional Linear–Hyperbranched Block Copolymers via Hyperbranched Macro-Chain-Transfer Agents

2013 ◽  
Vol 46 (8) ◽  
pp. 2892-2904 ◽  
Author(s):  
Lutz Nuhn ◽  
Christoph Schüll ◽  
Holger Frey ◽  
Rudolf Zentel
Keyword(s):  
Block Copolymers ◽  
Ring Opening ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Transfer Agents

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...

scholarly journals Thermal and photo-RAFT polymerization of 2,2,2-trifluoroethyl α-fluoroacrylate

2018 ◽  
Vol 9 (24) ◽  
pp. 3388-3397 ◽  
Author(s):  
Qizhi Yang ◽  
Marc Guerre ◽  
Vincent Ladmiral ◽  
Bruno Ameduri
Keyword(s):  
Block Copolymers ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Thermal Conditions ◽  
Light Irradiation ◽  
Transfer Agents

RAFT polymerization of 2,2,2-trifluoroethyl α-fluoroacrylate (FATRIFE) was studied under thermal conditions and light irradiation in the presence of four chain transfer agents. Polymers with narrow dispersities were obtained in the presence of trithiocarbonate CTA2, and this further led to fluorinated block copolymers.

Living Radical Polymerization with Reversible Addition−Fragmentation Chain Transfer (RAFT Polymerization) Using Dithiocarbamates as Chain Transfer Agents

1999 ◽  
Vol 32 (21) ◽  
pp. 6977-6980 ◽  
Author(s):  
Roshan T. A. Mayadunne ◽  
Ezio Rizzardo ◽  
John Chiefari ◽  
Yen Kwong Chong ◽  
Graeme Moad ◽  
...  
Keyword(s):  
Radical Polymerization ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Living Radical Polymerization ◽  
Reversible Addition ◽  
Transfer Agents

Raft Polymerization ofN,N-Dimethylacrylamide Utilizing Novel Chain Transfer Agents Tailored for High Reinitiation Efficiency and Structural Control†

2002 ◽  
Vol 35 (10) ◽  
pp. 4123-4132 ◽  
Author(s):  
Michael S. Donovan ◽  
Andrew B. Lowe ◽  
Brent S. Sumerlin ◽  
Charles L. McCormick
Keyword(s):  
Structural Control ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Transfer Agents

scholarly journals Ring-opening metathesis polymerization of cyclooctene derivatives with chain transfer agents derived from glycerol carbonate

2014 ◽  
Vol 5 (7) ◽  
pp. 2583 ◽  
Author(s):  
Abdou K. Diallo ◽  
Liana Annunziata ◽  
Stéphane Fouquay ◽  
Guillaume Michaud ◽  
Frédéric Simon ◽  
...  
Keyword(s):  
Ring Opening ◽  
Chain Transfer ◽  
Glycerol Carbonate ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Transfer Agents

scholarly journals Synthesis and Self-Assembly of Poly(N-Vinylcaprolactam)-b-Poly(ε-Caprolactone) Block Copolymers via the Combination of RAFT/MADIX and Ring-Opening Polymerizations

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1252
Author(s):  
Rodolfo M. Moraes ◽  
Layde T. Carvalho ◽  
Gizelda M. Alves ◽  
Simone F. Medeiros ◽  
Elodie Bourgeat-Lami ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ring Opening ◽  
Chain Transfer ◽  
Fluorescence Probe ◽  
Size Exclusion ◽  
Proton Nuclear Magnetic Resonance ◽  
Solution Temperature ◽  
Copolymer Composition ◽  
Resonance Spectroscopy ◽  
Scanning Calorimetry

Well-defined amphiphilic, biocompatible and partially biodegradable, thermo-responsive poly(N-vinylcaprolactam)-b-poly(ε-caprolactone) (PNVCL-b-PCL) block copolymers were synthesized by combining reversible addition-fragmentation chain transfer (RAFT) and ring-opening polymerizations (ROP). Poly(N-vinylcaprolactam) containing xanthate and hydroxyl end groups (X–PNVCL–OH) was first synthesized by RAFT/macromolecular design by the interchange of xanthates (RAFT/MADIX) polymerization of NVCL mediated by a chain transfer agent containing a hydroxyl function. The xanthate-end group was then removed from PNVCL by a radical-induced process. Finally, the hydroxyl end-capped PNVCL homopolymer was used as a macroinitiator in the ROP of ε-caprolactone (ε-CL) to obtain PNVCL-b-PCL block copolymers. These (co)polymers were characterized by Size Exclusion Chromatography (SEC), Fourier-Transform Infrared spectroscopy (FTIR), Proton Nuclear Magnetic Resonance spectroscopy (1H NMR), UV–vis and Differential Scanning Calorimetry (DSC) measurements. The critical micelle concentration (CMC) of the block copolymers in aqueous solution measured by the fluorescence probe technique decreased with increasing the length of the hydrophobic block. However, dynamic light scattering (DLS) demonstrated that the size of the micelles increased with increasing the proportion of hydrophobic segments. The morphology observed by cryo-TEM demonstrated that the micelles have a pointed-oval-shape. UV–vis and DLS analyses showed that these block copolymers have a temperature-responsive behavior with a lower critical solution temperature (LCST) that could be tuned by varying the block copolymer composition.

Evaluation of cyclopentene-based chain-transfer agents for living ring-opening metathesis polymerization

1989 ◽  
Vol 22 (8) ◽  
pp. 3191-3200 ◽  
Author(s):  
R. R. Schrock ◽  
K. B. Yap ◽  
D. C. Yang ◽  
H. Sitzmann ◽  
L. R. Sita ◽  
...  
Keyword(s):  
Ring Opening ◽  
Chain Transfer ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Transfer Agents

Synthesis of amphiphilic block copolymers based on poly(dimethylsiloxane) via fragmentation chain transfer (RAFT) polymerization

Polymer ◽  
2004 ◽  
Vol 45 (13) ◽  
pp. 4383-4389 ◽  
Author(s):  
Tommy S.C Pai ◽  
Christopher Barner-Kowollik ◽  
Thomas P Davis ◽  
Martina H Stenzel
Keyword(s):  
Block Copolymers ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Amphiphilic Block Copolymers
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