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Showing 1 to 20 of 67 for “"ROMP"”.
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Applications of ROMP Polymers
… by ring-opening metathesis polymerization (ROMP) based on monomers containing recognition groups that display restricted rotation. We could modulate the binding properties of the SPPs by heating in polar or non-polar solvents (water/acetonitrile). The SPPs are also able to remember their …
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Ruthenium complexes as potential aqueous romp catalysts
… Aqueous Ring-Opening Metathesis Polymerisation (ROMP) of bicyclic monomers using ruthenium complex catalysts. Two monomers were synthesised for the purpose of these studies, namely exo, exo-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (7-oxanorbornenedicarboxylic acid) and exo, …
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Characterizing Mechanical and Gas Transport Properties of Nitrile Norbornene (NN) ROMP in Preparation for Analysis of OMe-NN-ROMP Block Copolymers
… gas transport properties of nitrile norbornene ROMP. At a concentration of 0.15 M, the nitrile norbornene was able to successfully ROMP without becoming gel-like allowing for further characterization. The number average molecular weight was found to be 155 kDa with a polydispersity of 31.04. …
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Evaluation of Tungsten Hexachloride as a ROMP Active Catalyst Precursor for Self -Healing Polymers
… WCl6 retained sufficient activity for use as a ROMP precursor for self-healing applications. Mechanical evaluation through fracture experiments showed healing efficiencies as high as 92% if the processing and testing environment was carefully controlled.
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Z-selective olefin metathesis processes and Cis/syndioselective ROMP with high oxidation state molybdenum alkylidenes
… compounds are also investigated towards the ROMP of DCMNBD and found to produce polyDCMNBD in a range of tacticities and cis contents. Highly cis polyNBDF6 (poly-bis(CF 3)-norbomadiene) was also prepared using molybdenum MAP compounds, and the resulting polymer was found to be essentially …
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I. Macromolecular and architectural effects on the polymerization of α-helices & II. Functional ROMP curing polyester thermosets
… of ring-opening metathesis polymerization (ROMP) to fabricate new useful materials. ROMP has been a widely utilized and powerful polymerization method to create extremely smart and tunable materials. While a few monomers capable of being polymerized with ROMP have found commercial success, …
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Self-Condensing Ring-Opening Metathesis Polymerization
Ring-opening metathesis polymerization (ROMP) is a great tool for synthesizing polyolefin materials with different topologies, including hyperbranched polymers—polymers with high degrees of branching and many end groups. However, hyperbranched polymer synthesis via ROMP is challenging due to …
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Potato genomics three ways: quantification of endoreduplication in tubers, a romp through the transposon terrain, and elucidation of flower color regulation
Investigations of potato (Solanum tuberosum) have been hampered by its complicated genetics and high genetic load. This dissertation applies genome reduction techniques to investigate a broad swath of genomic and physiological phenomena. It begins with the presentation and evaluation of a protocol …
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Metal-Free Photoredox-Mediated Ring Opening Metathesis Polymerization
… ring-opening metathesis polymerization (MF-ROMP) is a novel approach to the synthesis of ROMP polymers. Whereas traditional, metal-mediated ROMP uses well-defined transition metal-alkylidene initiators in stoichiometric amounts, MF-ROMP uses a photo-oxidant to oxidize an organic vinyl ether …
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Ring-opening Metathesis Polymerization for the Creation of Responsive Colloids and Surfaces
Ring-opening metathesis polymerization (ROMP) is a well-controlled living polymerization method and has been widely used to synthesize various polymer materials. This thesis investigates the use of ROMP in the creation of responsive materials, including photonic polymer colloids and …
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New Purification Strategies and Monomer Platforms for Ruthenium-Initiated Living Ring-Opening Metathesis Polymerization
… ring-opening metathesis polymerization (ROMP) remains an extraordinary tool for polymer synthesis due to its functional group tolerance, the ready availability of monomers and initiators, and the overall ease at which well-defined polymers can be rapidly synthesized. However, complete …
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Ru-mediated ring-opening metathesis polymerization for the synthesis of complex polymer architectures
Ring-opening metathesis polymerization (ROMP) has gained attention over the last few decades for its versatility and robustness. Through the use of highly active metal catalysts, such as Grubbs' first-generation catalyst [G1, (PCy3)2(Cl)2RuCHPh] and Grubbs' third-generation catalyst [G3, …
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Neue cycloaliphatische Polymere und Polymerdispersionen durch übergangsmetallkatalysierte Polymerisation cyclischer Olefine und polymeranaloge Reaktionen
… der ringöffnenden Metathesepolymerisation (ROMP) von Cycloolefinen in organischen und wässrigen Reaktionsmedien. Durch Kombination von ROMP und polymeranaloger Reaktionen, konnte der Zugang zu neuen thermooxidaktiv beständigen Polymeren, kohlenhydratanalogen Polymeren und Polymerdispersionen …
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Dynamic remodeling and rapid manufacturing of functional materials by ring-opening metathesis polymerization
Ring-opening metathesis polymerization (ROMP) is a powerful and broadly applicable method to synthesize polymeric materials with unique architectures and useful functions. Remarkable progress has been made on the molecular design of catalysts and monomers that allows precise control over ROMP. The …
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Accessing Model, Functional Polyolefins and Polyolefin Copolymers with Ring-Opening Metathesis Polymerization
… methods. Ring-opening metathesis polymerization (ROMP) is a useful tool for achieving this goal as the catalysts are often tolerant to a wide range of functional groups, and the polymerizations are typically well-controlled making polymers with moderate dispersities. Chapter 2 describes the …
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Design, synthesis and characterization of fluorescent hyperbranched polyglycerols and organic nanoparticles with covalently bound anti-fading agents
… agents proved intractable, so a norbornyl based ROMP polymer was used instead. Through the iterative use of ROMP and RCM, organic nanoparticles (ONPs) were synthesized incorporating multiple fluorescein and AFA units. The ONPs were brighter and more photostable than fluorescein. The …
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I. Functionalization and Investigation of Highly Efficient Hosts for Use in Macromolecular Self-Assemblies and II. The Design and Synthesis of ROMP Imidazolium Systems for Use as Mechanical Actuators
Recent advancements in supramolecular chemistry have given a wealth of strongly binding host-guest combinations. However, the deployment of these systems into meaningful constructs has been hindered due to difficulty of synthesis or to the lack of functionality in one or both components. Systems …
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Bottlebrush and related polymer architectures for biomedical applications
… Synthesis of Multivalent Macromonomers for ROMP Here, we report the three-step convergent synthesis (two-step longest linear sequence) of a divalent exo-norbornene imide capable of efficient coupling with various nucleophiles and azides to produce diversely functionalized branched …
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Investigating the fundamentals of ring-opening metathesis polymerization to synthesize large, well-defined, bottlebrush polymers
Ring-opening metathesis polymerization (ROMP) is a robust synthetic technique for synthesizing complex polymer architectures (topologies). To achieve complex architectures, specifically bottlebrush polymers, using ROMP, attaining the highest degree of living character is essential. As the molecular …
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Studies of Metathesis for Materials Applications: Present and Future Possibilities
… ringopening metathesis polymerizations (ROMP). Currently, the first- and third-generation Grubbs initiators, which exhibit the ease of handling characteristic of the late metal ruthenium, dominate ROMP applications. These initiators are characterized by extremes of reactivity, however. We …
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