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Showing 1 to 15 of 15 for “"copolymer composition"”.
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Dendronized Amphiphilic Copolymers Synthesized from Methacrylate Derivatives as Potential Topical Microbicides
… In the presence of MMP, MIII (5 to 25 mol%) was copolymerized with alkyl (methyl, ethyl, and n-butyl) methacrylates. Copolymer composition correlated well with monomer feed; Mns of 3–10K g/mol were observed. Ionizable polymers were achieved via acidolysis with trifluoroacetic acid; significant …
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Statistical mechanical theory of equilibrium structure and miscibility of polymer nanocomposites: effects of polymer chemical heterogeneity and architecture, and nanoparticle surface corrugation and softness
… polymer chemical heterogeneity via the use of AB copolymers offers additional control over the equilibrium structure. Specifically, two types of copolymers are considered – (1) random copolymers (RCP) of disordered sequence and (2) ordered, alternating multiblock copolymers (MBCP). Quantum …
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Copolymerization of divinylbenzene and 4-vinylpyridine using initiated chemical vapor deposition for surface modification and its applications
This research investigates the copolymerization of divinylbenzene and 4- vinylpyridine into organic thin films that exhibit conformal, stable, and uniform surface properties. Thin films were grown using initiated chemical vapor deposition, a variant of hot-wire deposition using a chemical …
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Impact of end groups of PLGA on polymer properties and ocular implant performance
… forms. From a manufacturing stand point, the copolymer provides several merits. However, the risk of distortion on hydration causing endothelial contact, the biological fate of the polymeric system and the physico-chemical properties of the active compound are all issues that need to be …
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Physico-chemical studies of block copolymers in aqueous solution
… solution behaviour of oxyethylene/oxypropylene copolymers has been investigated as a function of temperature (275-370K), copolymer concentration (0.1-5% w/v) and copolymer composition [polyoxypropylene (POP) and polyoxyethylene (POE) homopolymers (750-4000gmol-1 ) and diblock copolymers …
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Crystallization, Melting Behavior, Physical Properties, and Physical Aging of Ethylene/1-Octene Copolymers
… physical properties of ethylene/1-octene (EO)-copolymers after primary crystallization is investigated by calorimetry, density, and creep measurements. The temporal evolution of the multiple melting of EO-copolymers is monitored by differential scanning calorimetry. The low temperature …
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Ion containing copolymers via the emulsion copolymerization of polar and ionic vinyl monomers
The synthesis of ion containing copolymers by emulsion copolymerization of polar vinyl monomers with ionic vinyl monomers has been studied. The copolymerization of n-butyl acrylate with sodium-pstyrene sulfonate proved to be particularly rapid. With the proper choice of chain transfer agent soluble …
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Linking Thermophysical Transitions and Rheological Properties to Polymer Foaming Outcomes with Carbon Dioxide
… examines the role of crystallinity and block copolymer composition in altering the polymer behavior in carbon dioxide. Several EVACO polymers with varying ethylene, vinyl acetate, and carbon monoxide content have been explored to study how block copolymer composition affects the thermophysical …
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The study and characterisation of water-based latices used for can coating interiors
… resins. A quantitative method for determining copolymer composition using GPC was evaluated. The GPC method was also used to determine polymer composition as a function of molecular weight. IR spectroscopy was used to determine the total level of acrylic modification of the polymers and NMR was …
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Amphiphilic block copolymer micelles : creation of functional nanocavities and their use as nanocontainers for controlled release
Block copolymers in solution can self-assemble in to a variety of morphologies, with features on the nanometer length scale. This has lead to significant recent research into this assembly process and a wide range of potential applications. The exchange of block copolymer molecules between micelles …
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New inverse hydogel opals as protein responsive sensors
… in the presented systems until now. The copolymer composition was chosen to result in a hydrogel collapse over 35 °C. All hydrogels showed pronounced swelling in water below the critical temperature. The incorporation of a reactive monomer with hydroxyl groups ensured a potential coupling …
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Synthesis and Characterization of Sulfonated Poly (Arylene Ether Sulfone) Copolymers Via Direct Copolymerization: Candidates for Proton Exchange Membrane Fuel Cells
A designed series of directly copolymerized homo- and disulfonated copolymers containing controlled degrees of pendant sulfonic acid groups have been synthesized via nucleophilic step polymerization. Novel sulfonated poly (arylene ether sulfone) copolymers using 4,4'-bisphenol A, 4,4'-biphenol, …
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Enabling Synthesis Toward the Production of Biocompatible Magnetic Nanoparticles With Tailored Surface Properties
Amphiphilic tri- and penta-block copolymers containing a polyurethane central block with pendant carboxylic acid groups flanked by hydroxyl functional polyether tails were synthesized. Our intention was to investigate the activities of these copolymers as dispersants for magnetite nanoparticles in …
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Thiophene Derivative Monomers Co-electropolymerized on Microelectrodes within Arrays for Tailored Surface Chemistry and Electrochemical Properties
… through the film, is unaffected by the comonomer composition. However, for films from solutions in which only monomer 2 is present (100 mol% 2), the capacitance is the same as the bare gold. These films have a minimal background current and further modified by a chemical reporter would make a …