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Showing 1 to 20 of 98 for “"maleic anhydride"”.
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New Applications for Poly(ethylene-alt-maleic anhydride)
… of an understanding of poly(ethylene-alt-maleic anhydride) in terms of both its physical behaviour and chemistry. Chapter one involves a thorough and rigorous characterisation of the polymer, and three principle things are established: the polymer is structurally uniform, reacts in a …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… in subphase affinity.Several poly(1-alkene-alt-maleic anhydride) (PXcMA) polymers were studied at both the gas/liquid interface as Langmuir films and at the gas/solid interface as Langmuir-Blodgett thin films on silicon substrates. A 0.01 M HCl solution (pH~2) was used during film deposition to …
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Synthesis and Polymerization of Substituted Stilbenes with Maleic Anhydride for Membrane Solubilization and Protein Extraction
… SMA2000—a commercially available styrene-maleic anhydride copolymer with a 2:1 styrene to maleic anhydride ratio—has demonstrated broad utility in the isolation and subsequent characterization of a wide range of integral membrane proteins. However, there are some limitations to the use of …
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Gas Phase Oxidation of Levulinic Acid for the Production of Maleic Anhydride over Supported Vanadium Oxide Catalysts
… derived from lignocellulosic biomass, to produce maleic anhydride, a valuable commodity chemical. This process is carried out over supported vanadium oxide catalysts. Yields as high as 71% of the theoretical maximum were achieved at 573 K over a vanadium oxide catalyst supported on SiO2. The exact …
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Production And Structure/Properties Of Nylon-6 Core / Isotactic Polypropylene Sheath Bicomponent Fibers Suitable For Use In Carpeting Applications
… reactive compatibilization was achieved using a maleic anhydride functionalized polypropylene between the materials at the interface. The overall goal of the research was to produce a bicomponent fiber of these materials that would be suitable for use in commercial carpet applications. Carpet …
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Tensile and fracture behaviour of isotropic and die-drawn polypropylene-clay nanocomposites. Compounding, processing, characterization and mechanical properties of isotropic and die-drawn polypropylene/clay/polypropylene maleic anhydride composites
As a preliminary stage of the present study, the physical and mechanical properties of polypropylene nanocomposites (PPNCs) supplied by Queen’s University Belfast were evaluated. Subsequently, polymer/clay nanocomposite materials were produced at Bradford, where mixing and processing routes were …
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Tensile and fracture behaviour of isotropic and die-drawn polypropylene-clay nanocomposites. Compounding, processing, characterization and mechanical properties of isotropic and die-drawn polypropylene/clay/polypropylene maleic anhydride composites
As a preliminary starting point for the present study, physical and mechanical properties of polypropylene nanocomposites (PPNCs) for samples received from Queen's University Belfast have been evaluated. Subsequently, polymer/clay nanocomposite material has been produced at Bradford. Mixing and …
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Diels-Alder Reactions of 5-[Methoxypoly(Oxyethylene)]-(3E)-1,3-Pentadiene
… reactions of Ia and Ib with acrolein, maleic anhydride, and diethyl acetylenedicarboxylate have been performed. The products of these reactions have been analyzed by spectroscopic techniques. The Diels-Alder adducts of Ia with maleic anhydride and acrolein are converted corresponding …
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Synthesis and Solution Properties of Semi-rigid Polyelectrolytes and Polyampholytes
… fashion with acceptor comonomers such as maleic anhydride and maleimide. These sterically crowded polymer backbones are classified as semi-rigid. As this is an uncommon category of polymer backbone rigidity, examples of semi-rigid and rigid polyzwitterions in the literature were reviewed …
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Investigation of interfacial bonding in banana fiber-reinforced composites : ascribing global economic value to unique renewable resources in developing countries.
… treatments as well as polymer additives such as maleic anhydride. This study seeks to compare the effectiveness of these treatments on the interfacial bonding as well as their effect on the mechanical properties of the fiber reinforced composite. Results reveal an increase in bonding and some …
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An investigation into the partial oxidation of C-4 alkanes over vanadyl pyrophosphate and heteropoly acids
… catalyst for the conversion of n-butane to maleic anhydride and the heteropoly acid catalyst for the conversion of isobutane to methacrylic acid.
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The influence of different chemical treatments on the mechanical properties of hemp fibre-filled polymer composites
… (3-aminopropyltriethoxysilane) and a maleic anhydride treatment. The effectiveness of the chemical treatments was assessed by means of XRD, FTIR and TGA. Density measurements of as-received yarns (1.42-1.45 g cm-3 ) were within the range reported in the literature. Crystallinity …
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Process design for the production of maleic acid hydrazide for weed control
In the investigation the effects of excess maleic anhydride, hydrazine hydrate-solvent reagent addition time, volume of reaction mass after concentration by heating at 100 °C, mixing of reactants, and the solvent selected were studied for the heterogeneous reaction of maleic anhydride and hydrazine …
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Transparent Omniphobic Coatings that are Flexible and Wear Resistant
… consists of blends of poly(ethylene-alt-maleic anhydride)-graft-polydimethylsiloxane (PEMA-g-PDMS) and cycloaliphatic epoxy-functionalized oligosiloxanes (CEOS). The anti-wetting agent of polydimethylsiloxane (PDMS) was covalently attached to poly(ethylene-alt-maleic anhydride) (PEMA) via …
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Functional Polymers Containing Semi-Rigid Alternating Sequences
… interest in our group are the stilbene-maleic anhydride/maleimide alternating copolymers. These copolymers possess sterically congested backbones and precisely placed functional groups arising from the strictly alternating copolymerization. The research in this dissertation is focused on …
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Synthesis of reactive and stimuli-responsive polymer thin films by initiated chemical vapor deposition and their sensor applications
… alternating copolymers of poly(styrene-alt-maleic anhydride) were synthesized. This was the first demonstration of alternating copolymer synthesis by CVD. Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, and 13C NMR characterization verified that well-defined …
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Correlation of physical and chemical properties of anhydride-cured epoxy resins with theoretical structure
The structure of alicyclic dicarboxylic anhydrides was found to have a significant effect on the final physical and chemical properties of a cured epoxidized novolac resin, and the final properties of a cured system can be predicted with reasonable accuracy from the theoretical structure. …
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Copolymerization of a P-Vinylbenzyl-Ended Poly(Oxyethylene) With Vinyl Monomers and Some Reactions of Poly(Oxyethylene) Derivatives
… macromonomer. In addition, the reactions of mPEG-maleic anhydride {prepared from the reaction of 5-[methoxypoly(oxyethylene)]-(3E)-1,3 pentadiene and maleic anhydride} with amines such as 2-methylaniline, 2-(2-aminoethoxy) ethanol, and ethyl ester derivative of DL-Pheylalanine have also been …
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Carbon nanotube assisted formation of sub-50 nm polymeric nano-structures
… patterned polymer substrates. Poly(styrene-alt-maleic anhydride) (PSMa) was prepared by the initiated chemical vapor deposition (iCVD) method, an alternative to spin-on deposition. The sub-50 nm PSMa polymer patterns were prepared by low energy oxygen plasma etching by using CNTs as the masks. …
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