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Showing 1 to 13 of 13 for “"reversible addition-fragmentation chain-transfer polymerization"”.
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Synthesis and Characterization of Graphene-Polymer Nanocomposites via Reversible Addition-Fragmentation Chain-Transfer Polymerization
… to develop a facile approach for growing polymer chains from the surface of graphene sheets via reversible addition-fragmentation chain-transfer (RAFT) polymerization. Graphene oxide was synthesized by reacting graphite with potassium permanganate and concentrated sulfuric acid. The oxidation and …
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Novel Precursors for Polymer-Protein-Conjugate Synthesis via Reversible Addition-Fragmentation Chain Transfer Polymerization
The RAFT polymerization of N-isopropylacrylamide with two different chain transfer agents, namely benzyl 1-pyrrolecarbodithioate and cumyl 1-pyrrolecarbodithioate, yielded polymers with narrow molecular weight distributions as well as Mn values that were in good agreement with the calculated ones. …
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Overcoming Challenges in Reversible Addition–Fragmentation Chain Transfer Polymerization using Photoinduced Electron/Energy Transfer Catalysis
The development of polymerization methodologies is discussed, with an emphasis on addressing two limitations in reversible addition–fragmentation chain transfer (RAFT) polymerization. Both methods employ photoinduced electron/energy transfer (PET) catalysis to generate radicals within the …
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Synthesis and study of the micellization behavior of a dual temperature- and pH-responsive PAA-b-PNIPAM block copolymer
… diblock copolymers with different relative chain lengths of the hydrophobic and hydrophilic blocks were synthesized by reversible addition fragmentation chain transfer polymerization. The preliminary results showed high conversion values for all products. Proton nuclear magnetic resonance …
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Synthesis and Characterization of Cation-Containing and Hydrogen Bonding Supramolecular Polymers
… polymers synthesized using controlled radical polymerization techniques such as nitroxide mediated polymerization (NMP) and reversible addition-fragmentation chain transfer polymerization (RAFT). Non-covalent interactions were expected to increase the effective molecular weight of the polymeric …
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Synthesis, Characterization, and Application of Metal-chelating Polymers for Mass Cytometric Bioassays
… polymers. The synthesis began with reversible addition-fragmentation chain transfer polymerization, and was followed by numerous post-polymerization pendant group transformations to introduce DTPA lanthanide chelators to every repeat unit, and a maleimide at the end of the chain. The …
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Stereochemical Effect of RAFT Agents on Kinetics of Reversible Deactivation Radical Polymerization
The propagation polymer chains in RDRP can be isolated in the dormant form and be re-activated at chain ends to generate propagating radicals, which initiate subsequent chain extensions. Since the effect of remote substituents on kinetics decreases rapidly with their distance from the reaction site …
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Designing Acrylic Block Copolymers with Multiple Hydrogen Bonding or Multiple Ionic Bonding
… of hydrogen and ionic bonding contributes to the reversible properties of acrylic polymers, opening new avenues for designing materials with mechanical strength and processability. These non-covalent interactions function as physical crosslinks, which provide enhanced structural and mechanical …
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Visible Light-Mediated Polymerization for Protein-Polymer Conjugation: A Biocompatible Tool for Therapeutic Applications
… The development of controlled/living radical polymerization (CLRP) techniques (or also known as reversible-deactivation radical polymerization, RDRP) has been emerging since 1990’s to address these issues and refine the process. Notably, the recent advancements in photochemistry, such as …
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Multiblock Copolymer Synthesis in Aqueous Heterogeneous Systems
The development of Reversible Deactivation Radical Polymerization (RDRP) techniques have revolutionized the field of polymer chemistry. These techniques provide the ease and flexibility of conventional radical polymerization, yet hold much of the control and livingness of anionic polymerization. …
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Design and Synthesis of Supramolecular Structures for the Controlled Release of Sulfur Signaling Species
… micelle core mobility when discussing polymer chain phase behavior of amphiphilic block copolymers. Finally, this work discloses new methods for the radical polymerization of poly(olefin sulfones) with control over molecular weight. POSs are a unique class of polymers with great potential for …
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Synthesis and Characterization of Zwitterion-Containing Acrylic (Block) Copolymers for Emerging Electroactive and Biomedical Applications
Conventional free radical polymerization of n-butyl acrylate with 3-[[2-(methacryloyloxy)ethyl](dimethyl)-ammonio]-1-propanesulfonate (SBMA) and 2-[butyl(dimethyl)amino]ethyl methacrylate methanesulfonate (BDMAEMA MS), respectively, yielded zwitterionomers and cationomers of comparable chemical …
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Photopolymerization-based signal amplification : mechanistic characterization and practical implementation
Polymerization-based signal amplification is an approach to biosensing that leverages the amplification inherent to radical polymerization to enhance signal associated with molecular recognition. This versatile technique has been implemented with a number of radical polymerization chemistries, …