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.
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Showing 1 to 20 of 51 for “"Emulsion Polymerization"”.
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Emulsion Polymerization Using Switchable Surfactants
… use of CO2-triggered switchable surfactants in emulsion polymerization of hydrophobic and hydrophilic monomers. Bicarbonate salts of the following compounds were employed as surfactants in the emulsion polymerization of styrene, methyl methacrylate (MMA) and/or butyl methacrylate (BMA): …
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Mathematical modelling in batch emulsion polymerization
Emulsion polymerisation, suspension polymerisation and the dispersion processes of styrene in water have been carried out at 50°C in a stainless steel, stirred batch reactor of 3.63 dam capacity. The reactor was fitted with a temperature control facility and could be operated with or without …
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Ultrasonically initiated free radical catalyzed emulsion polymerization of methyl methacrylate
<p>"The emulsion polymerization of methyl methacrylate initiated by ultrasound has been studied at ambient temperature using sodium lauryl sulfate as the surfactant.</p> <p>The source of the free radical for the initiation process was found to come from the degradation of the sodium lauryl sulfate …
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Nucleation in emulsion polymerization : steps towards a non-micellar nucleation theory
… of the mechanism of particle nucleation in emulsion polymerization has been one of the most challenging issues in heterophase polymerization research. Within this work a comprehensive experimental study of particle nucleation in emulsion polymerization of styrene at 70 °C and variety of …
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Preparation of CO2-Switchable Poly(Methyl Methacrylate) Latexes by Surfactant-Free Emulsion Polymerization
… methacrylate) latexes by surfactant-free emulsion polymerization. N,N-Dimethylaminoethyl Methacrylate (DMAEMA) was chosen as the functional comonomer to act as an in-situ generated surface active agent as well as the CO2 responsive agent. The azo initiator …
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Effect of stirring on the emulsion polymerization of styrene when catalyzed by hydrogen peroxide catalysts
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Chemistry, 1948
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Synthesis and Optimization of Emulsion Polymers
… with the synthesis of an acrylic latex. Various emulsion polymerization processes were used including semi-batch, starved-feed, and in-situ seeded in the attempt to produce a stable latex that can be used in a broader study concerning the syneresis and rheology mechanisms of latex/thickener …
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Synthesis, Characterization, Processing and Physical Behavior of Melt-Processible Acrylonitrile Co- and Terpolymers for Carbon Fibers: Effect of Synthetic Variables on Copolymer Synthesis
… The terpolymer was synthesized by an efficient emulsion polymerization route and has a typical composition of acrylonitrile/ methyl acrylate/acryloyl benzophenone in the molar ratio of 85/14/1. This thesis describes a systematic variation of the polymerization variables in the emulsion …
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Investigations of biphasic seeded emulsion polymerizations in a continuous tubular reactor
… development of a continuous tubular process for emulsion polymerization. Prior approaches have mostly focused on transposing batch emulsion polymerization recipes into tubular reactors. While this transposition had been successful in producing low solids contents material, it failed at producing …
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Multiscale simulation of heterophase polymerization : application to the synthesis of multicomponent colloidal polymer particles
Heterophase polymerization is a technique widely used for the synthesis of high performance polymeric materials with applications including paints, inks, adhesives, synthetic rubber, biomedical applications and many others. Due to the heterogeneous nature of the process, many different relevant …
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Thermally-responsive interpenetrating polymer network nanoparticles as intelligent therapeutic systems
… were synthesized using a sequential inverse emulsion polymerization technique. These materials were shown to exhibit a positive sigmoidal swelling response upon heating in solution. The positive swelling response of these nanoparticles serves as an ideal on/off trigger for controlled release …
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Scale-Up of Latex Reactors and Coagulators: A Combined CFD-PBE Approach
… zoned based on a mixing metric. Subsequently, an emulsion polymerization model is solved on this relatively course grid in order to determine the time evolution of the PSD. Examination of shear rate profiles generated using CFD simulation (at varying reactor scales) suggests that, dependent on …
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Multiblock Copolymer Synthesis in Aqueous Heterogeneous Systems
… development of Reversible Deactivation Radical Polymerization (RDRP) techniques have revolutionized the field of polymer chemistry. These techniques provide the ease and flexibility of conventional radical polymerization, yet hold much of the control and livingness of anionic polymerization. …
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Synthesis and Crystallization of Anisotropic Polymer Colloids
Using seeded emulsion polymerization, methods are presented to synthesize polymer colloids with chemical and shape anisotropy. Two types of particles consisting of interpenetrating spheres, or dicolloids, are synthesized with length scales varying from approximately 300 nm to roughly 1.2 microm. …
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