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Showing 1 to 20 of 23 for “"Reversible Addition Fragmentation Chain Transfer (RAFT) polymerization"”.
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Investigation Of Parameters Enabling Admicellar Reversible Addition-Fragmentation Chain Transfer (Raft) Polymerization
To date, enormous studies on admicellar polymerization have been recorded since the initial reports in the 1980’s. This technique which offered the advantage of using inexpensive materials and facile procedures, proven to be a successful surface modification technique. Nevertheless, one has to …
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The synthesis of well-defined functional homo- and block copolymers in aqueous media via Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization
New chain transfer agents based on dithiobenzoate and trithiocarbonate for free radical polymerization via Reversible Addition-Fragmentation chain Transfer (RAFT) were synthesized. The new compounds bear permanently hydrophilic sulfonate moieties which provide solubility in water independent of the …
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Adsorption behaviour of molecularly imprinted-beta-cyclodextrin polymers prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization for selective recognition of benzylparaben
… on β-cyclodextrin (β-CD) and the essential of reversible addition�fragmentation chain transfer (RAFT) polymerization process were studied to generate potential MIPs. The study focuses on the characterization and adsorption behaviour of MIPs for selective recognition of benzylparaben (BzP) …
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Raft Polymerization Of Ph-Responsive, Diblock Copolymers For Nucleic Acid Delivery Vehicles
… With the advent of controlled radical polymerization (CRP) and more specifically reversible addition-fragmentation chain transfer (RAFT) polymerization, it is now possible to develop well-defined polymers with predicted molecular weights and architectures. The work presented here …
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Synthesis and Solution Properties of Semi-rigid Polyelectrolytes and Polyampholytes
… solution properties and their controlled radical polymerizations. Substituted stilbene monomers readily polymerize in an alternating fashion with acceptor comonomers such as maleic anhydride and maleimide. These sterically crowded polymer backbones are classified as semi-rigid. As this is an …
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Developing green processes for the conversion of biobased materials into pyrones
… a nucleophilic heterocycle undergoing conjugate addition with brominated TAL producing a corrosion inhibitor. Successful corrosion inhibitors were synthesized in moderate to good yields. The highest corrosion inhibitor efficiency was 88% for newly developed corrosion inhibitors.</p> <p>In the …
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Development of Carbohydrate-based Diblock Polymers for Nucleic Acid Delivery
… chemistry. These monomers were polymerized via reversible addition-fragmentation chain transfer (RAFT) polymerization to yield glycopolymers with the desired lengths and low polydispersity indexes. Glycopolymers were chain-extended with aminoethylmethacrylamide to produce cationic diblock …
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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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CONTROLLED SYNTHESIS OF TOPOLOGICALLY TEMPLATED CATENANE AND KNOTTY POLYMER
… weight catenanes and the trefoil knot. In addition, recent advances in synthesis of topologically similar cyclic polymer via end-to-end cyclization of linear analogue or ring-expansion polymerization from cyclic catalyst/initiator are also discussed. Chapter 2 demonstrates a novel route for …
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Controlling the Properties of Polymer Metal-Organic Frameworks and Cages Through Polymer Ligand Design
… featuring MOF-forming linkers on their sidechains using common radical polymerization techniques: reversible addition fragmentation chain transfer (RAFT) polymerization and free radical polymerization (FRP). High-dispersity ligands prepared through FRP formed crystalline polyMOFs while …
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Development of Sustainable Thermoplastic Elastomers
… were successfully synthesized using reversible addition fragmentation chain transfer (RAFT) polymerization. SAS exhibited elastomeric behavior at room temperature and were processable above the order-disorder transition (ODT) temperature. The alkyl side-chain length of the …
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Twofold switchable block copolymers based on new polyzwitterions
… monomers were synthesized and polymerized by reversible addition-fragmentation chain transfer (RAFT) polymerization, using a fluorophore labeled RAFT agent. The polyzwitterions of systematically varied molar mass were characterized with respect to their solubility in water, deuterated water, …
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Tailoring Intermolecular Interactions for High-Performance Nanocomposites
… pendant groups determined the polymer Tg. Reversible addition-fragmentation chain-transfer (RAFT) polymerization enabled the synthesis of ABA triblock copolymers with urea-containing methacrylic outer blocks and poly(2-ethylhexyl methacrylate) inner blocks. These ABA triblocks copolymers …
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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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Bridging Mesoscale Phenomena and Macroscopic Properties in Block Copolymers Containing Ionic Interactions and Hydrogen Bonding
Anionic polymerization and controlled radical polymerization enabled the synthesis of novel block copolymers with non-covalent interactions (electrostatic interaction and/or hydrogen bonding) to examine the relationships between mesoscale phenomenon and macroscopic physical properties. Non-covalent …
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Developing Stimulated Raman Spectroscopic Techniques For Imaging Below the Optical Diffraction Limit
… normally weak Raman scattering process using an additional laser beam, resulting in increased signal amplitudes. For this reason, it has been developed as a biological imaging platform with the potential to be used as an alternative to fluorescence microscopy due to its chemical specificity. This …
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Design of functional polymeric materials for cancer-targeted drug delivery and cellular capture and isolation
… block copolymer polymeric micelles (BCPMs) by reversible addition-fragmentation chain transfer (RAFT) polymerization for targeted delivery of therapeutics to cancer cells. The synthesized BCPMs were extensively studied and evaluated for their chemistry and biological functions in in vitro …
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Synthesis and Characterization of Siloles, Silole-Containing Polymers and Photoswitchable Polymer Brush
… we were able to accomplish the synthesis in one additional step; nevertheless, our method is still advantageous compare to the other known methods. We have also synthesized silole molecules that can be further functionalized for application as fluorescent sensors. The synthesis and properties of …
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Design, Synthesis and Application of Cylindrical Polymer Brushes: From Nanostructures to Advanced Materials
… synthetic pathways for well-defined CPBs via reversible addition-fragmentation chain transfer (RAFT) polymerization, designed and prepared complex functional CPBs for light-harvesting and energy transfer, and utilized CPBs as templates for the synthesis of novel one-dimensional (1D) …
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New hydrogel forming thermo-responsive block copolymers of increasing structural complexity
… of stimuli-responsive polymers made by reversible addition-fragmentation chain transfer (RAFT) polymerization and the investigation of their self-assembly into “smart” hydrogels. In particular the hydrogels were designed to swell at low temperature and could be reversibly switched to a …
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