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Showing 1 to 10 of 10 for “"Livingness"”.
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Ru-mediated ring-opening metathesis polymerization for the synthesis of complex polymer architectures
… most commonly substituted norbornenes. The high livingness of ROMP makes it well-suited for the synthesis of complex polymer architectures (e.g., bottlebrush polymers, star polymers, and (multi)block copolymers, among others). However, compared to other living polymerizations, quantitative …
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Multiblock Copolymer Synthesis in Aqueous Heterogeneous Systems
… polymerization, yet hold much of the control and livingness of anionic polymerization. Thus, highly organized sequence-controlled macromolecular architectures such as multiblock copolymers can now be synthesized. Synthetic chemical techniques have been implemented in homogeneous systems to achieve …
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Synthesis and Characterization of Well-Defined Poly(1,3-Cyclohexadiene) Homopolymers and Copolymers
… that lacked significant degrees of livingness, which limited the polymer molecular weights to approximately 10000. Use of the preformed initiator resulted in a reduction in the degree of both chain termination and chain transfer. In addition, the livingness of the polymerization was …
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Investigation of Copper Wire-Mediated Controlled/Living Radical Polymerization
… Both provide good control over polymerization, livingness, narrow dispersity (~1.1), high retention of chain-end functionality (>90%), and can be recycled, which should be considered for an industrial scale implementation. Furthermore, utilization of a bromine chain-end functionality of …
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Synthesis of fluorinated polymers in supercritical carbon dioxide (scCO₂)
… of initiator derived end groups, supporting livingness of the system. The “livingness” is based on the labile C-I bond. However, due to the weakness of the C-I bond perfluorinated hexyl iodide also contributes to initiation. To allow for kinetic analyses of VDF polymerizations the CTA should …
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Synthesis and Characterization of Graphene-Polymer Nanocomposites via Reversible Addition-Fragmentation Chain-Transfer Polymerization
… PNIPAM, and PtBA from this modified surface. The livingness of the polymerization was verified by GPC characterization. The additional free RAFT agents in the reaction system could enhance the control of the polymerization on PDA/RGO surface and in solution as measured by GPC. The polymer grafted …
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Well-defined molecular brushes: Synthesis by a "grafting through" strategy and self assembly into complicated hierarchical nanostructures
… to either backbone or side chains, using the "livingness" characters of the employed polymerization techniques. Those block molecular brushes can be used as building blocks to construct more complicated hierarchical nanostructures, which are self assembled from simpler precursory …
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Radical based molecular design of discrete and stereoregulated oligomers via photomediated RAFT single unit monomer insertion (photo-RAFT SUMI)
… Subsequent chain extension has demonstrated the “livingness” of the pentamers, illustrating the feasibility of further SUMI reactions to form longer discrete polymers. Subsequently, this promising synthetic method was successfully transformed to a flow reaction system. Facilitated by automated …
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Investigating the fundamentals of ring-opening metathesis polymerization to synthesize large, well-defined, bottlebrush polymers
… of the side chain or backbone increases, the "livingness" of the polymerization suffers due to premature catalyst degradation. Attaining large, well-defined, bottlebrush polymers requires precision so it was our goal to determine how seemingly simple reaction variables could affect the rates of …
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Living cationic polymerization of styrene monomers
… (MWD) measured using GPC demonstrated the livingness of the polymerizations, indicating the absence of irreversible termination and transfer within the lifetimes of the polymerizations. The proposed 'two species' propagation mechanism was found to apply for the styrene polymerization with …