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Showing 1 to 15 of 15 for “"ionenes"”.
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Tailored Architectures of Ammonium Ionenes
… and characterization of a variety of ammonium ionenes from water-soluble coatings to high-performance elastomers are discussed. Water-soluble random copolymer ionenes were synthesized using the Menshutkin reaction from 1,12-dibromododecane, N,N,Nâ ²,Nâ ²-tetramethyl-1,6-hexanediamine, and …
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Synthesis and characterization of ammonium ionenes containing hydrogen bonding functionalities
Ammonium ionenes are polycations that have quaternary nitrogens in their macromolecular backbone and are synthesized via step-growth polymerization technique. They offer interesting coulombic properties, and the synthetic design provides control over charge density. Non-covalent interactions …
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Synthesis, Molecular Weight Characterization and Structure-Property Relationships of Ammonium Ionenes
Ammonium ionenes are macromolecules with quaternized nitrogen groups in the main chain. Ionenes are commonly referred to as x,y-ionene, where x and y represent the number of methylene groups between quaternized nitrogens. Synthesis of aliphatic ammonium ionenes has been studied since the early …
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Influence of Electrostatic Interactions and Hydrogen Bonding on the Thermal and Mechanical Properties of Step-Growth Polymers
… cation-containing polyurethane. Ammonium ionenes, which contain quaternary nitrogen in the macromolecular repeating unit, have many potential uses in biomedical applications. They offer interesting coulombic properties, and the charge density is easily controlled through synthetic design. …
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From N to P: Examining Structure-Property Relationships of Ammonium- and Phosphonium-Containing Macromolecules
… well-defined, high molecular weight phosphonium ionenes for the first time. Phosphonium ionenes exhibited higher thermal stability and alkaline stability compared to ammonium ionenes. Due to their high thermal stability and relatively low glass transition temperatures, unprecedented melt rheology …
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Tailoring Intermolecular Interactions for High-Performance Nanocomposites
… synthesis of novel oxalamide-containing ammonium ionenes. The hydrogen bonding, charge density, and counter anion tuned the ionene mechanical properties. The ionene structure also influenced water uptake and conductivity. The differences in physical properties correlated well with the morphology …
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Synthesis and Characterization of Multiphase, Highly Branched Polymers
… was used for the synthesis of highly branched ionenes and polyurethanes. Highly branched ionenes, which have a quaternary ammonium salt in the main chain, were synthesized with a modified Menshutkin reaction. The oligomeric A2 was comprised of well-defined telechelic tertiary amine endcapped …
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Designing Multiphase Step-Growth Polymers for Advanced Technologies: From Electromechanical Transducers to Additive Manufacturing
… a novel route towards synthesizing imidazolium ionenes with unique backbone structures. The coupling of poly(ethylene glycol) dibromides with a bis-carbonylimidazole monomer and a commercial aliphatic dibromide led to the formation of segmented imidazolium ionenes. These polymers exhibited …
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Ionene and ionene alkyl sulfate stoichiometric complexes
… into mesogenic structures. The [X,Y]-ionenes ([(CH2)XN+(CH3)2(CH2)YN+(CH3)2]nBr-2n) investigated formed stoichiometric complexes with alkyl sulfates. The ionene alkyl sulfate complexes display mesogenicity, i.e. optically isotropic dry complexes underwent lyotropic and thermotropic …
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Polymer Electrolyte Discovery via Rational Design and High Throughput Methods
… the rational design of highly dissociative ionenes, and the development of a high throughput platform to increase the scale and speed of polymer electrolyte research. In the former, we investigate the impact of anion dissociation energy on ion conduction in solid polymer electrolytes via a …
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Synthesis and Characterization of Novel Polyethers and Polydimethylsiloxanes for Use in Biomaterials
… from novel PDMS precursors as well as PDMS-based ionenes with different hard segment groups.
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The Synthesis of Anionic and Amine Containing Polymers for Potential Gas Separations
… of anionic sulfonated polyimide and polyamide ionenes with negative charges on the polymer backbone were studied. In this study, the monomer amino-N-(4-aminophenyl)sulfonylbenzenesulfonamide was synthesized and reacted with dianhydrides (PMDA, 6FDA) and dichloride containing comonomers …
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Synthesis and characterization of high performance polytetrahydrofuran based polyurethane-urea and ionene elastomers
… produce a novel segmented ionene elastomer. The ionenes thus synthesized displayed interesting solution behavior and could be molded, or cast to produce good physical properties. Photochromic as well as thermochromic phenomena were also noticed in these systems.
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Structure-property behavior of free radical synthesized polydimethylsiloxane-polystyrene block polymers and polytetramethyleneoxide based ionene elastomers
… were also investigated. The PTMO-dihalide ionenes were obtained through the courtesy of Dr. C. M. Leir in 3M, while the PTMO-dipyridinium ionenes were synthesized by Dr. B. Lee in Prof. McGrath’s research group at VPI&SU. In the free radical synthesized PDMS-PS block polymers, the molecular …
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Tailoring Structure and Function of Imidazole-Containing Block Copolymers for Emerging Applications from Gene Delivery to Electromechanical Devices
The imidazole ring offers great potential for a variety of applications including gene delivery vectors, ionic liquids, electromechanical actuators, and novel monomers and polymers. The imidazole ring provides a unique building block for these applications due to its thermal stability, aromatic …