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Showing 1 to 13 of 13 for “"Solution polymerization"”.
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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 three different processes namely (a) bulk polymerization 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 …
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Predictive Modeling of Metal-Catalyzed Polyolefin Processes
… processes. Most researchers focus only on polymerization mechanisms and reaction kinetics, and neglect physical properties and phase equilibrium. Both physical properties and phase equilibrium play key roles in the accuracy and robustness of a model. This work presents the fundamental …
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Polyacrylamide and its derivatives for oil recovery
… (IPN) was prepared by in situ free radical solution polymerization/crosslinking of acrylamide and N, N'-methylene-bisacrylamide, as well as chemically crosslinking of PVA with glutaradehyde. Flory-Rehner theory of swelling equilibrium including the ideal Donnan equilibria has been utilized …
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Synthese von Pulvern aus dem System CaO-SiO2 mittels nasschemischer Verfahren und Entwicklung eines Werkstoffes unter dem Aspekt einer Applikation in der Dentalmedizin
… der "Polyacrylamid Route", der "Solution-Polymerization Route" und der Nitrat-Methode. Durch die Variation der Ausgangssubstanzen und der Syntheseparameter wurde eine Optimierung der Synthesebedingungen zur Herstellung homogener Precursor erreicht. Die Calcination dieser Precursor …
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The ring-opening polymerization of cyclosiloxanes in the presence of bis ([alpha], [omega]-aminopropyl)-1,3-tetramethyldisiloxane
The ring-opening polymerization of octamethylcyclotetrasiloxane, D₄ , in the presence of bis(α,ω-aminopropyl)-1,3-tetramethyldisiloxane using potassium siloxanolate and tetramethylammonium siloxanolate catalysts has been investigated. The use of reversed-phase high performance liquid chromatography …
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Aerogels and films through free radical polymerization
… and induces crosslinking by surface initiated polymerization (SIP). Here, we extend the scope of Si-AIBN in two directions: (a) we demonstrate extremely adhering, covalently attached polymer coatings on oxidized surfaces (glass, metal) and eventually we adapt the method into highly durable …
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Synthesis and characterization of high performance polyimide homopolymers and copolymers
… is then cyclodehydrated by either thermal or solution imidization at high temperatures to give the fully cyclized polyimides. This research focuses on the development of a low temperature solution polymerization route utilizing a transimidization method to make fully cyclized polyimide …
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Polydimethylsiloxane Modification of Segmented Thermoplastic Polyurethanes and Polyureas
… into the polyurethane backbone via one step solution polymerization. The effect of PDMS content on thermal stability, morphology, surface composition, mechanical properties, and fire resistance of polyurethane was investigated. These polymers displayed a complex two phase morphology and …
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Synthesis and characterization of polydimethylsiloxane-urea segmented copolymers
… (PSX) of different molecular weights by solution polymerization. The conditions needed to synthesize well-defined and high molecular weight siloxane-urea copolymers in high yields were investigated. 2-ethoxyethyl ether (2-EEE) was a better reaction solvent than tetrahydrofuran (THF) …
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Synthesis and Characterization of trans-1,4-Cyclohexylene Ring Containing Poly(arylene ether sulfone)s
… PAESs were comprehensively studied. Different polymerization techniques were used to synthesize polymers with different segmental lengths. The monomer, 4,4'-[trans-1,4-cyclohexanebis(methylene)] bisphenol (CMB), was synthesized and fully characterized. Based on 4,4′-dihydroxy-p-terphenyl …
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Novel Carbazole Based Methacrylates, Acrylates, and Dimethacrylates to Produce High Refractive Index Polymers
… and dimethacrylates. Subsequent free radical polymerizations provided for high refractive index materials well suited for lightweight optical spectacles and other applications. The refractive index of materials can be increased by increasing the polarizability of substituent groups. By …
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Structure-property relationships in segmented copolymers
… and polydimethylsiloxane, synthesized by solution polymerization. lt is shown that by varying the length of the segments for each phase and their relative content, it is possible to alter the mechanical and thermal characteristics. The mechanical response was also influenced according to …
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Non-covalent Intermolecular Interactions in Polymer Design: Segmented Copolymers to Non-viral Gene Delivery Vectors
… possessed good mechanical properties after bulk polymerization of ethyl oxalate terminated PDMS oligomers with alkyl diamines or varied length. FTIR spectroscopy experiments revealed an ordered hydrogen bonding carbonyl stretching band for each copolymer and as the spacing between oxamide groups …