Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Methyl methacrylate (MMA)"”.
-
Dehydrogenation of N-Propanol to Propionaldehyde over a copper chromite catalyst
Methyl methacrylate (MMA) is widely used for a range of polymer products. MMA can be produced from propionaldehyde via the BASF process. n-Propanol is readily available 'in South Africa as a byproduct of Fischer-Tropsch synthesis. This prompted an investigation into the production of …
-
Materials and coatings derived from the polymerizable ionic liquid surfactants 1-(2-acryloyloxyundecyl)-3-methylimidazolium tetrafluoroborate and 1-(2-acryloyloxyundecyl)-3-methylimidazolium 2-acrylamido-2-methyl-propylsulfonate
… applications. First, 1-(2-acryloyloxyundecyl)-3-methylimidazolium tetrafluoroborate (IL-BF<sub>4</sub>) was synthesized and was copolymerized with methyl methacrylate (MMA) via microemulsion polymerization. The resulting polymer gels can be transformed into porous materials by anion exchange, and …
-
Dynamic Modelling and Optimization of Polymerization Processes in Batch and Semi-batch Reactors. Dynamic Modelling and Optimization of Bulk Polymerization of Styrene, Solution Polymerization of MMA and Emulsion Copolymerization of Styrene and MMA in Batch and Semi-batch Reactors using Control Vector Parameterization Techniques.
… of styrene, (b) solution polymerization of methyl methacrylate (MMA) and (c) emulsion copolymerization of Styrene and MMA in batch and semi-batch reactors are the focus of this work. In this work, models are presented as sets of differential-algebraic equations describing the process. …
-
Emulsion Polymerization Using Switchable Surfactants
… in the emulsion polymerization of styrene, methyl methacrylate (MMA) and/or butyl methacrylate (BMA): N’-hexadecyl-N,N-dimethylacetamidine (1a), N’-dodecyl N,N-dimethylacetamidine (2a) and N’-(4-decylphenyl)-N,N-dimethylacetamidine (3a). A systematic study of the effects of surfactant and …
-
An investigation of the radiation polymerization of methyl methacrylate-kaolin clay composites
… study has been made on the effects of gamma-rays (Co⁶⁰) on the polymerization of a 50-50 weight mixture methyl methacrylate (MMA) kaolin clay system. The effect of dose rate (7.35 - 24.9 rads per second), temperature (25 to 75ºC) and total dose on the percentage conversion of monomer to …
-
Miscibility, Viscosity, Density, and Formation of Polymers in High-Pressure Dense Fluids
… volumetric properties, and viscosity of poly (methyl methacrylate) (PMMA), poly (ε-caprolactone) (PCL) and their blends. Homopolymerization and copolymerizations of methyl methacrylate (MMA) and 2-methylene-1,3-dioxepane (MDO) in mixtures of acetone + CO2 have also been explored. The …
-
Improved swellable polymer microspheres for chemical sensing
… particle size.</p><p>Microspheres of 2-(dimethylamine)ethyl methacrylate (DMAEMA) and 4-vinyl pyridine (4VP) were synthesized with various comonomers including 2-hydroxyethyl methacrylate (HEMA), methyl methacrylate (MMA) and styrene. Microparticles made of DMAEMA and HEMA did not generate …
-
Lignin acrylate derivatives and their behaviors in free radical copolymerizations
… were subjected to reaction with isocyanatoethyl methacrylate (IEM) using dibutyltin dilaurate as catalyst. The acrylate derivatives were characterized by elemental analysis, UV, IR, <sup>1</sup>H-NMR, and <sup>13</sup>C-NMR spectroscopy. The acrylated lignin model compounds, guaiacol-IEM urethane …
-
Deformation and fracture of PMMA with application to nanofoaming and adhesive joints
… understanding of the deformation and fracture of methyl methacrylate (MMA)-based polymers in the context of void growth. The first part of the thesis focuses on the prediction of void growth during solid state nanofoaming of polymethyl methacrylate (PMMA). These predictions may contribute to the …
-
Modelling of colloidal dynamics in complex soft matter systems
… of n-BA, a co-polymerization involving n-BA and methyl methacrylate (MMA) and, finally, a ter-polymerization of n-BA with MMA and 2-HydroxyEthyl Methacrylate (2-HEMA); the data for the first two series have been found in the literature, while the data for the ter-polymerization have been provided …
-
Comprehensive Study of Semicontinuous Emulsion Polymerisation Processes for Producing Nanoparticles
… Monomers with intermediate water solubility like methyl methacrylate (MMA) can only produce stable composite particles at acidic conditions, at which silica nanoparticles are less stable. By contrast, more water-soluble monomers like vinyl acetate (VA) can easily yield composite particles at both …
-
Tailoring Structure and Function of Imidazole-Containing Block Copolymers for Emerging Applications from Gene Delivery to Electromechanical Devices
… (1-VIm) and free radical copolymerizations with methyl methacrylate (MMA) and n-butyl acrylate (nBA) afforded homopolymers and copolymers with tunable solution and thermal properties. Aqueous SEC provided reproducible and reliable molecular weights for poly(1-VIm) in the absence of polymer …
-
Advancing Elastomers to Additive Manufacturing Through Tailored Photochemistry and Latex Design
… with varied compositional ratios of hexyl methacrylate (HMA) and methyl methacrylate (MMA), and thus established a platform for investigating the effect of latex particle thermal properties on this newly discovered latex photoprocessing approach. Incorporation of scaffold monomer, N-vinyl …