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 20 of 22 for “"Radical polymerisation"”.
-
Herstellung definierter Polymerstrukturen durch 'Atom transfer radical polymerisation'
… based on styrene by means of atom transfer radical polymerisation (ATRP). The focus is placed on the synthesis of novel block copolymers, synthesis and coupling of telechelic polymers as well as on the preparation of soluble styrene copolymers that can be cross-linked thermally and …
-
Some aspects of free radical polymerisation in UV-curing
… as synergist, were used to initiate the polymerisation of acrylates. It was found that the quinoxalines where used with amine synergist are efficient Type II initiators. It was also found that the cure of the acrylate is faster when oxygen is present in the reaction mixture than when it …
-
Synthese von maßgeschneiderten Polymeren auf Methacrylatbasis durch 'Atom Transfer Radical Polymerisation' (ATRP)
… polymers based on methacrylates. To control the polymerisation process, the atom transfer radical polymerisation (ATRP) method was used. On the one hand, the thesis describes the preparation of polymers for the application in a composite. On the other hand, macromonomers and monomers with …
-
Atom transfer radical polymerisation - towards the synthesis of a fully-functional photorefractive polymer
Atom transfer radical polymerisation (ATRP) of styrene in xylene solution initiated with 1-phenylethyl bromide and mediated by CuBr/N-propyl-2- pyridinemethanimine catalyst complex was studied. The polymerisation was ill-controlled, yielding polymers with broad molecular weight distributions and …
-
Darstellung von Telechelen auf Acrylat- und Methacrylatbasis durch 'atom transfer radical polymerisation' und 'atom transfer radical addition'
… and methacrylic monomers using atom transfer radical polymerisation and atom transfer radical addition. The telechelics can be used as prepolymers in polyaddition and polycondensation reactions. Polymerisation of MMA and MA with bifunctional initiators and different ligands as well as chain …
-
Directed Phase Separation of Polymer Blends on Binary-Patterned Polymer Brushes
… bromide to produce initiators for atom transfer radical polymerisation, allowing the synthesis of patterned polymer brushes. Dehalogenation of the first brush, followed by deprotection, modification and a second polymerisation produced binary-patterned brushes. Unpatterned and patterned polymer …
-
Functional polymer layers with protected amines
… terpolymers should be synthesised by free radical polymerisation of suitable monomers. Although these techniques are successful, they are limited by their complexity, rigorous synthetic demands, as well as incompatibility with many functional termolabile and highly reactive functionalities. …
-
Synthesis, micellar properties and application of amphiphilic linear block copolymers with different microstructure but same molecular weight
… methacrylates by means of the modern controlled radical polymerisation technique, namely the atom transfer radical polymerisation (ATRP). The objective was the synthesis of linear block copolymers with different microstructure but same molecular weight. The chosen synthesis strategy should be …
-
The effect of the oxygen inhibition layer on interfacial bond strengths and stain resistance of dental resin composites
The free-radical polymerisation reactions of photoactive resins used in dentistry are inhibited by oxygen. There is a need to better understand the effects oxygen inhibition on critical properties of dental resins and resin composites which may compromise the success of dental resin composite …
-
Synthese und kolloidale Eigenschaften neuartiger Blockcopolymere mit beta-Dicarbonyl Einheiten = Synthesis and colloidal properties of a novel type of block copolymers bearing beta-dicarbonyl residues
… Polymers were obtained by Group Transfer Polymerisation (GTP)/acetoacetylation and controlled radical polymerisation techniques (RAFT).Different micellar morphologies of poly(n-butyl methacrylate)-block-poly[2-(acetoacetoxy)ethyl methacrylate] (pBuMA-b-pAEMA) were observed in cyclohexane …
-
Poly-N-vinylamid-modifizierte Elektrode als Komponente eines spektroelektrochemischen Sensors für Catecholderivate
… amide) copolymers have been synthesised by radical polymerisation from N-vinylpyrrolidone (NVP) and N-vinylphthalimide (NVPH). The suitability of the copolymers for a permselective membrane for a spectroelectrochemical sensor was studied with the goal to detect catechol derivatives. A …
-
Synthesis and characterization of polymacromonomers based on polyethers
… CMC on the level 0,7 g/L. The conventional free radical and controlled free radical polymerisation (ATRP) were used for preparation of polymacromonomers with different properties. The radical polymerization of the macromonomers was carried out in water using AVA as initiator and in the mixture of …
-
Liquid repellent surfaces
… surfaces have been produced by the pulsed plasma polymerisation of I H, 1 H,2H,2H -heptadecafluorodecyl acrylate. These films have chemical functionalities indicative of polymerisation occurring through the acrylate double bond, as shown by Infrared Spectroscopy analysis. Structural retention was …
-
Aspects of radiation curing
The electron beam induced polymerisation of dialkyltin diacrylates, as well as the UV and electron beam induced polymerisation of some novel silicon containing acrylates are discussed. The reactivity and film forming properties of these materials are compared with that of some commercial diluents …
-
Synthesis and performance of novel azo initiators with special reference to emulsion polymerisation
… both as initiators for different modes of free-radical polymerisation and also as stabilisers for emulsion polymerisation reactions carried out in the absence of added conventional surfactant. During the preparation of the above compounds, it was discovered that 4,4'-azobis-4-cyanopentanoyl …
-
Conductive Membranes for Fouling Mitigation and Permeate Flux Control
… with PEDOT copolymer embedded with atom transfer radical polymerisation (ATRP) initiator. A uniform, antifouling brush was successfully grafted on the conductive fibre surface by filtering the polymerisation solution through the conductive membrane to complete the surface-initiated ATRP. The …
-
Organic-inorganic hybrid materials: new functionalised polyoxotungstates
… the polyoxotungstate units. Examples include the polymerisation of carbon double bonds and condensation reactions of carboxylic acids and amines; both are investigated here. Radical polymerisation is successful in creating polymeric materials, either through single reaction of the polyoxotungstate …
-
Novel polymeric microcapsules for targeted drug delivery
… microcapsules - conventional interfacial polymerisation with plasma-induced grafting and a novel phase-inversion technique with chemical grafting. This research demonstrated that microcapsules with a porous shell could be manufactured by interfacial polymerisation. Carboxyl groups …
-
SYNTHESIS AND CHARACTERISATION OF NOVEL BIOPOLYMERS VIA CLICK CHEMISTRY
… a great potential as a cross-linker in the free radical polymerisation of HEMA to generate hydrogels. Chapter four presents the utilisation of Click chemistry to produce trehalose-based glycopolymers which have a wide range of potential applications. Biodegradable glycopolymers containing PCL or …
-
Computer-Guided Design of Photocatalyst for PET-RAFT Polymerisation
Photo-controlled polymerisation uses a photo-excited photocatalyst (PC) to reversibly and deactivate the propagating species. Under regulation by light, photo-controlled polymerisation features temporal control, spatial control, sequence control and high level of selectivity/orthogonality between …
Page 1 of 2