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Dissertations / Theses on the topic 'Hydrogel blocks'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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1

May, Patrick [Verfasser], and Mathias [Akademischer Betreuer] Ulbricht. "Concentration polarization enabled hydrogel coating of desalination membranes using crosslinkable zwitterionic polymeric building blocks / Patrick May ; Betreuer: Mathias Ulbricht." Duisburg, 2020. http://d-nb.info/1214180051/34.

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2

Lauber, Lionel. "Control of the rheological properties of hydrogels made by self-assocation of amphiphilic copolymers, blocks and grafts, anionics or cationics." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1010/document.

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L’objectif de ce travail était de contrôler les propriétés rhéologiques de solutions aqueuses de copolymères amphiphiles. Dans l’eau, ces copolymères s’auto-associent et leurs propriétés peuvent être contrôlées en partie par leur dynamique d’échange. Il avait précédemment était montré que cette dynamique pouvait être contrôlée par le pH et la quantité d’unités acide acrylique dans des triblocs BAB (THx) où le bloc A est du poly(acide acrylique) (PAA) et les blocs B sont des copolymères statistiques (MHx) d’acrylate de n-butyle (nBA) et d’acide acrylique (AA). Tout d’abord, l’étude de l’auto-as
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3

Smith, Christopher. "p-block hydrogen storage materials." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:6dd710a5-baf2-4fd2-918c-d1df97c229bf.

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The development of a clean hydrogen economy will aid a smooth transition from fossil fuels which is required to stem the environmental impact and economic instability caused by oil dependency. For vehicular application, in addition to being cheap and safe, a commercial hydrogen store must contain a certain weight percentage of hydrogen to provide a reasonable range (~300 miles). It must also be able to release hydrogen under near-ambient conditions (80-120°C) and have a reasonable cycling capacity (~1000 cycles). The primary motivation of this thesis is to gain a fundamental understanding into
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4

Biemond, Gerard Jan Eduard. "Hydrogen bonding in segmented block copolymers." Enschede : University of Twente, 2006. http://doc.utwente.nl/51102.

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5

Price, Clayton. "Metal-nucleobase complexes : building blocks for supramolecular chemistry." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244473.

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6

Velthoen, Ingrid Winette. "Thermo-responsive hydrogels based on branched block copolymers." Enschede : University of Twente [Host], 2008. http://doc.utwente.nl/58918.

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7

Miasnikova, Anna. "New hydrogel forming thermo-responsive block copolymers of increasing structural complexity." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/5995/.

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This work describes the synthesis and characterization of stimuli-responsive polymers made by reversible addition-fragmentation chain transfer (RAFT) polymerization and the investigation of their self-assembly into “smart” hydrogels. In particular the hydrogels were designed to swell at low temperature and could be reversibly switched to a collapsed hydrophobic state by rising the temperature. Starting from two constituents, a short permanently hydrophobic polystyrene (PS) block and a thermo-responsive poly(methoxy diethylene glycol acrylate) (PMDEGA) block, various gelation behaviors and swit
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8

Olson, Jared K. "Ab Initio Search for Novel BxHy Building Blocks with Potential for Hydrogen Storage." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/844.

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On-board hydrogen storage presents a challenging barrier to the use of hydrogen as an energy source because the performance of current storage materials falls short of platform requirements. Because boron is one of the lightest chemical elements that can form strong covalent bonds with hydrogen, it provides an excellent opportunity to design new lightweight materials on the basis of novel boron hydride building blocks. Realizing this potential requires an understanding of the electronic structure, chemical bonding, and stability of neutral and anionic BxHy clusters with variable stoichiometry.
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9

Jalloh, Muneer. "Probe diffusion and nanoscale structure in block copylymer hydrogels." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522408.

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10

Kang, Jungmee. "The synthesis of nanoporous hydrogels using sacrificial block copolymers." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37224.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2006.<br>Includes bibliographical references (leaves 102-106).<br>The purpose of this research is to synthesize nanostructured and porous hydrophilic networks (nanoporous hydrogels) using block copolymers and to understand their transport properties. Nanoporous materials are synthesized by connecting two or more chemically distinct polymer blocks, inducing microphase separation to form a pattern on the scale of tens of nanometers, and finally removing one of the polymer blocks. The sacrificial block needs to
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11

Higley, Mary Nell. "The Synthesis of Modular Block Copolymers." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14497.

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A novel methodology has been developed for the formation of block copolymers that combines ring-opening metathesis polymerization (ROMP) with functional chain-transfer agents (CTAs), functional chain-terminators (CTs) and self-assembly. Telechelic homopolymers of cyclooctene derivatives that are end-functionalized with hydrogen-bonding or metal-coordination sites are formed via the combination of ROMP with a corresponding functional CTA. These telechelic homopolymers are fashioned with a high control over molecular weight and without the need for post-polymerization procedures. The homopoly
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12

Binar, Radim. "Vliv hydrolýzy na chemické a fyzikální vlastnosti PAN hydrogelů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-401451.

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Předložená diplomová práce se zabývá přípravou hydrogelů odvozených od polyakrylonitrilu a charakterizací jejich fyzikálních a chemických vlastností. Teoretická část shrnuje základní poznatky z oblasti hydrogelů, a také o polyakrylonitrilu. Dále se zabývá možností zpracování polyakrylonitrilu do reaktivní formy, takzvaného aquagelu a jeho zásadité hydrolýzy za účelem přípravy multi-blokových kopolymerů schopných tvořit 3D síť (gel). Experimentální část prezentuje výsledky charakterizace hydrogelů z polyakrylonitrilu neboli HYPANů, které byly připraveny bazicky katalyzovanou hydrolýzou aquagelu
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13

Ivasenko, Oleksandr. "Supramolecular design of hydrogen-bonded architectures via surface self-assembly of carboxylic building blocks." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97007.

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Crystal engineering deals with the design of ordered arrays of molecular building blocks and is of high importance in nanotechnology, electronics and in the pharmaceutical industry. While organic synthesis provides access to a wide range of molecules, control over their intermolecular interactions is the major challenge taken on by crystal engineering. This thesis focuses on the surface self-assembly of carboxylic acids, as a convenient model system to study general factors governing self-assembly. It is a step towards the rational design of materials with desired compositions, morphologies an
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14

Wang, Zeyu. "Amphiphilic Triblock Copolymers for 3D Printable and Biodegradable Hydrogels." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1588277239478144.

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15

shah, champaklal sanket. "Pure Silica Sodalite as a Building Block for Hydrogen Separation Membranes." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1331569342.

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16

Chen, Xi. "Designing Acrylic Block Copolymers with Multiple Hydrogen Bonding or Multiple Ionic Bonding." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84961.

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The dynamic characteristics of hydrogen and ionic bonding contributes to the reversible properties of acrylic polymers, opening new avenues for designing materials with mechanical strength and processability. These non-covalent interactions function as physical crosslinks, which provide enhanced structural and mechanical integrity to acrylic block copolymers. The strong hydrogen bonding or ionic interaction also directs self-assembly to hierarchical microstructures, which enables many applications including thermoplastic elastomers and energy storage devices. Inspired by complementary hydrogen
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17

Röttger, Katharina [Verfasser]. "Ultrafast Deactivation Dynamics of Structurally Modified and Hydrogen-Bonded DNA and RNA Building Blocks / Katharina Röttger." Kiel : Universitätsbibliothek Kiel, 2017. http://d-nb.info/1137509805/34.

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18

Mather, Brian Douglas. "Non-Covalent Interactions in Block Copolymers Synthesized via Living Polymerization Techniques." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/27068.

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Non-covalent interactions including nucleobase hydrogen bonding and ionic aggregation were studied in block and end-functional polymers synthesized via living polymerization techniques such as nitroxide mediated polymerization and anionic polymerization. The influence of non-covalent association on the structure/property relationships of these materials were studied in terms of physical properties (tensile, DMA, rheology) as well as morphological studies (AFM, SAXS). Hydrogen bonding, a dynamic interaction with intermediate enthalpies (10-40 kJ/mol) was introduced through complementary hetero
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19

Schmalz, Alexander [Verfasser], and Axel [Akademischer Betreuer] Müller. "Smart Hydrogels based on Responsive Star-Block Copolymers / Alexander Schmalz. Betreuer: Axel Müller." Bayreuth : Universität Bayreuth, 2012. http://d-nb.info/1059412977/34.

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20

Agarwal, Ankit. "Novel amphiphilic block copolymers and their self-assembled injectable hydrogels for gene delivery." [Ames, Iowa : Iowa State University], 2007.

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21

Miasnikova, Anna [Verfasser], and André [Akademischer Betreuer] Laschewsky. "New hydrogel forming thermo-responsive block copolymers of increasing structural complexity / Anna Miasnikova. Betreuer: André Laschewsky." Potsdam : Universitätsbibliothek der Universität Potsdam, 2012. http://d-nb.info/1023802872/34.

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22

Osuji, Chinedum 1976. "Structure and properties of hydrogen and covalently bonded side group liquid crystalline block copolymers." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29973.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2003.<br>Vita.<br>Includes bibliographical references.<br>Diblock copolymers incorporating liquid crystallinity via a lateral attachment of mesogenic species to a flexible backbone were studied for their microstructure-property relationships. Two families of materials were studied, distinguished primarily by the method of attachment of the mesogen to the polymer. In the first, azobenzene based mesogens were covalently tethered to the isoprene blocks of a poly(styrene)-block-poly(isoprene), P(S-b
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23

Pertici, Vincent. "Récupération induite par l'implantation d'hydrogels, à base de polymères et de copolymères à blocs, suite à un traumatisme médullaire : analyse comportementale, électrophysiologique et histologique." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4026/document.

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Il n'existe actuellement aucun traitement efficace pour les patients présentant une blessure au niveau de la moelle épinière. Ce triste constat est, en partie, dû à la présente d'une cicatrice empêchant la repousse des tissus. Dans ce contexte, des biomatériaux (composés non-toxiques) pourraient être implantés afin de réduire la cicatrice en formation et de fournir un support de repousse aux fibres nerveuses. Parmi ces biomatériaux, certains semblent induire de nombreuses améliorations chez le rat. Nous avons renforcé ces résultats, à l'aide de techniques électrophysiologiques. De plus, nous a
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24

Chen, Mingtao. "Bridging Mesoscale Phenomena and Macroscopic Properties in Block Copolymers Containing Ionic Interactions and Hydrogen Bonding." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/84525.

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Anionic polymerization and controlled radical polymerization enabled the synthesis of novel block copolymers with non-covalent interactions (electrostatic interaction and/or hydrogen bonding) to examine the relationships between mesoscale phenomenon and macroscopic physical properties. Non-covalent interactions offer extra intra- and inter-molecular interactions to achieve stimuli-responsive materials in various applications, such as artificial muscles, thermoplastic elastomers, and reversible biomacromolecule binding. The relationship between non-covalent interaction promoted mesoscale phenom
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25

Kretschmer, Katja. "Dünne, multi-sensitive Hydrogelschichten aus photovernetzbaren Blockcopolymeren." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1132572580132-69304.

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Ziel dieser Arbeit ist die Darstellung funktioneller Materialien, die ein multi-sensitives Ansprechverhalten aufweisen. Die Charakterisierung des Quellverhaltens der Gele stellt die Voraussetzung dar, die phasenseparierten Polymerfilme als multi-sensitive Sensorschichten mit verbessertem Ansprechverhalten einzusetzen. Die Aufgabe dieser Arbeit besteht in der Synthese von AB-Blockcopolymeren, die im wässrigen Medium auf die Temperatur oder auf die Temperatur und den pH-Wert ansprechen. Unter Verwendung der Makroinitiator-Technik werden Blockcopolymere synthetisiert. Zunächst werden temperatur-s
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26

Lee, Sang-Ho. "Supramolecular Self-Assembly of Well-Defined Polymers:Positional Programming of Complementary Hydrogen Bonds." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/189675.

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27

Nouailhas, Hélène. "Etude des hydrogels formés par stéréocomplexation à partir de copolymères à blocs polylactide-poly(éthylène glycol)." Montpellier 2, 2007. http://www.theses.fr/2007MON20212.

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28

Lacombe, Jérémie. "Organisation multi-échelle de matériaux polymères contrôlée par la chimie aux interfaces." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLET012.

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Les propriétés des matériaux découlent en partie de leur organisation à l’échelle nano ou microscopique. Dans cette thèse, on montre qu’en contrôlant la chimie aux interfaces, des organisations très régulières peuvent être obtenus spontanément dans divers matériaux polymères.Dans une première, la chimie supramoléculaire a été utilisée pour contrôler l’organisation en masse de polymères greffés à une ou deux de leurs extrémités par la thymine (Thy) ou la 2,6-diamino-1,3,5-triazine (DAT), deux unités supramoléculaires complémentaires s’associant par liaisons hydrogène. Quelque soit la nature de
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29

Saito, Tomonori. "Synthesis and Characterization of Multiphase Block Copolymers: Influence of Functional Groups on Macromolecular Architecture." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27440.

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Low molecular weight liquid polybutadienes (1000 â 2000 g/mol) consisting of 60 mol% 1,2-polybutadiene repeating units were synthesized via anionic telomerization and conventional anionic polymerization. Maintaining the initiation and reaction temperature less than 70 °C minimized chain transfer and enabled the telomerization to occur in a living fashion, which resulted in well-controlled molecular weights and narrow polydispersity indices. MALDI-TOF mass spectrometry confirmed that the liquid polybutadienes synthesized via anionic telomerization contained one benzyl end and one protonate
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30

Myung, Suwan. "Cell-Free Biosystems Comprised of Synthetic Enzymatic Pathways: Development of Building Blocks, Immobilization of Enzymes, Stabilization of Cascade Enzymes, and Generation of Hydrogen." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50645.

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The production of hydrogen from low-cost abundant renewable biomass would be vital to sustainable development. Cell-free (in vitro) biosystems comprised of synthetic enzymatic pathways would be a promising biomanufacturing platform due to several advantages, such as high product yield, fast reaction rate, easy control and access, and so on. However, it is essential to produce (purified) enzymes at low costs and stabilize them for long periods to decrease biocatalyst costs.<br /><br />Thermophilic recombinant enzymes as building blocks were discovered and developed: fructose 1,6-bisphosphatase
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31

Gámiz, González Mª Amparo. "Biodegradable hydrogels based on water-soluble chitosan for cell transplant." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/73070.

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[EN] The aim of tissue engineering is to develop functional biological substitutes to replace or restore damaged tissues by preparing three-dimensional scaffolds able to accommodate cells plus signaling factors to promote the regeneration of damaged tissue. There is a special interest in developing scaffolds that while providing a favourable environment for cells also possess a degradation rate that can be adapted to the tissue's rate of regeneration. Scaffolds should be porous and possess a pore morphology adapted to the application for which they are designed. They must also be able to hold
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32

Burd, Caroline Glenn. "Supramolecular block and random copolymers in multifunctional assemblies." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24627.

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Thesis (Ph.D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2009.<br>Committee Chair: Marcus Weck; Committee Member: Bunz, Uwe; Committee Member: Collard, David; Committee Member: Jones, Christopher; Committee Member: Payne, Christine
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33

Chen, Xi. "Exploring Multiple Hydrogen Bonding and Ionic Bonding in the Design of Supramolecular Polymers." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/98729.

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Supramolecular polymers represent a family of polymeric materials that are held together with dynamic, noncovalent interactions. In contrast to conventional functional polymers that usually have high melt-viscosity due to their covalent nature and chain entanglement, supramolecular polymers combine excellent physical properties with low melt-viscosity, allowing for less energy-intensive processability and recyclability. Dynamic bonding with multiple binding sites, such as multiple hydrogen bonding or multiple ionic bonding, exhibits much stronger binding strength compared to the counterparts c
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34

Corten, Cathrin Carolin. "Synthese und Charakterisierung dünner Hydrogelschichten mit modulierbaren Eigenschaften." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1209463829168-95283.

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Im Mittelpunkt dieser Arbeit stand die Darstellung sensitiver Blockcopolymere und deren Gele, die als Ausgangsmaterialien in Sensor- und Aktorsystemen einsetzbar sind. Die Vereinigung verschiedener Ansprechparameter stellt erhöhte Anforderung an die Synthese. Geringe Ansprechzeiten lassen sich mit einer Gelgröße im µm-Bereich erreichen. Hydrogele dieser Größenordnungen können durch nachträgliche Vernetzung funktioneller linearer Polymere ermöglicht werden. Die Makroinitiatormethode ermöglichte den Aufbau verschiedener linearer photovernetzbarer Blockcopolymere. Zum Einen wurde das temperaturse
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35

Charbonneau, Céline. "Structures et propriétés rhéologiques d’hydrogels à dynamique contrôlée obtenus par l’auto-assemblage de copolymères à blocs amphiphiles." Thesis, Le Mans, 2012. http://www.theses.fr/2012LEMA1016/document.

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Les copolymères à blocs amphiphiles sont des macromolécules composées d’au moins un bloc hydrophile lié chimiquement à un ou plusieurs blocs hydrophobes. En milieu aqueux, ils s’auto-associent pour former des micelles dont les cœurs constitués des blocs hydrophobes sont protégés de l’eau par une couronne constituée des blocs hydrophiles hydratés. La majorité des copolymères à blocs amphiphiles génèrent dans l’eau des micelles « gelées » ne présentant aucun échange de chaînes entre elles. Ceci vient du fait que l’énergie nécessaire pour extraire un bloc hydrophobe du cœur des objets est beaucou
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36

Catrouillet, Sylvain. "Nanocylindres supramoléculaires formés par association de polymères à blocs promoteurs de liaisons hydrogène." Thesis, Le Mans, 2014. http://www.theses.fr/2014LEMA1006/document.

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L’objectif de cette thèse était d’obtenir des nanocylindres de Janus, particules présentant deux faces différentes, parchimie supramoléculaire. De telles particules seraient très intéressantes comme stabilisant d’émulsions mais sont trèsdifficiles à synthétiser. Notre idée a consisté à utiliser des systèmes auto-associatifs de type bisurée et trisurée, capablesde s’organiser en solution en structures cylindriques par le biais de liaisons hydrogène directionnelles. En décorant cesfonctions de deux bras polymères incompatibles, des propriétés de Janus sont attendues.Tout d’abord, l’étude de l’au
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Viswanathan, Kalpana. "Synthesis and Characterization of Novel Polymers for Functional and Stimuli Responsive Silicon Surfaces." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27052.

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The synthesis of a variety of novel functionalized polymers using living polymerization techniques to achieve functional and stimuli responsive coatings on silica surfaces are described. Since microscopic features on a surface influence the overall wetting properties of the surface, a systematic investigation of the influence of polymer architecture on the microscopic characteristics of the modified surfaces was studied using silane-functionalized linear and novel star-branched polystyrene (PS). Star-branched modifiers provide functional and relatively well-defined model systems for probing s
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38

Sava, Dorina F. "Quest Towards the Design and Synthesis of Functional Metal-Organic Materials: A Molecular Building Block Approach." Scholar Commons, 2009. https://scholarcommons.usf.edu/etd/5.

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The design of functional materials for specific applications has been an ongoing challenge for scientists aiming to resolve present and future societal needs. A burgeoning interest was awarded to developing methods for the design and synthesis of hybrid materials, which encompass superior functionality via their multi-component system. In this context, Metal-Organic Materials (MOMs) are nominated as a new generation of crystalline solid-state materials, proven to provide attractive features in terms of tunability and versatility in the synthesis process. In strong correlation with their struct
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Alkordi, Mohamed H. "Metal-Organic Materials: From Design Principles to Practical Applications." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3452.

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The modular nature of metal−organic materials allows for tuning their properties to meet a specific application through careful design of the molecular precursors, i.e. information encoding at the molecular level. Research in this area is highly interdisciplinary where synthetic organic chemistry, in silico modeling, and various analytical techniques merge together to afford better understanding of the basic science involved and eventually to result in enhanced control over the properties of targeted materials.
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40

Charbonneau, Céline. "Structures et propriétés rhéologiques d'hydrogels à dynamique contrôlée obtenus par l'auto-assemblage de copolymères à blocs amphiphiles." Phd thesis, Université du Maine, 2012. http://tel.archives-ouvertes.fr/tel-00770329.

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Les copolymères à blocs amphiphiles sont des macromolécules composées d'au moins un bloc hydrophile lié chimiquement à un ou plusieurs blocs hydrophobes. En milieu aqueux, ils s'auto-associent pour former des micelles dont les cœurs constitués des blocs hydrophobes sont protégés de l'eau par une couronne constituée des blocs hydrophiles hydratés. La majorité des copolymères à blocs amphiphiles génèrent dans l'eau des micelles " gelées " ne présentant aucun échange de chaînes entre elles. Ceci vient du fait que l'énergie nécessaire pour extraire un bloc hydrophobe du cœur des objets est beaucou
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41

Klymenko, Anna. "Élaboration d'hydrogels plurifonctionnels par auto-assemblage de copolymères à blocs amphiphiles : formation de réseaux interpénétrés, caractérisation des propriétés de transport." Thesis, Le Mans, 2015. http://www.theses.fr/2015LEMA1010/document.

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L’objectif de cette thèse était d'étudier les propriétés physico-chimiques de réseaux interpénétrés formés par auto-assemblage de copolymères à blocs amphiphiles stimulables. La première partie du travail a consisté à élaborer des hydrogels interpénétrés IPSAN (InterPenetrated Self-Assembled Network) à partir d’un simple mélange de copolymères triblocs associatifs. Ainsi, l’IPSAN correspond à une combinaison des deux réseaux polymères. Le premier réseau est formé par un copolymère tribloc à base de poly(oxyde d'éthylène) (tPOE) porteur de blocs hydrophobes polymérisables sous UV. Le deuxième r
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42

Chen, Senbin. "Synthesis of original block copolymers by combination of RAFT polymerization and supramolecular self-assembly." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0034.

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Ce travail a porté sur la préparation de copolymères à blocs et l’étude de leur assemblage supramoléculaire basé sur des liaisons hydrogènes entre les motifs homocomplémentaires ou hétérocomplémentaires. La stratégie de synthèse était basée sur la combinaison de la polymérisation radicalaire contrôlée de type RAFT et de la chimie supramoléculaire. Dans le chapitre 2, nous avons développé une stratégie s'appuyant sur la conception d'agents RAFT portant des groupements de type thymine / diaminopyridine (DAP) capables de générer des copolymères en étoile de type « miktoarm » bien définis. Pour él
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43

Nouar, Farid. "Design, Synthesis and Post-Synthetic Modifications of Functional Metal-Organic Materials." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1725.

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Porous solids are a class of materials of high scientific and technological significance. Indeed, they have the ability to interact with atoms, ions or molecules not only at their surface but also throughout the bulk of the solid. This ability places these materials as a major class involved in many applications such as gas storage and separation, catalysis, drug delivery and sensor technology. Metal-Organic Materials (MOMs) or coordination polymers (CPs) are crystalline compounds constructed from metal ions or clusters and organic components that are linked via coordination bonds to form zero
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44

Sheth, Jignesh Pramod. "Investigation of the Influence of Selected Variables on the Solid State Structure-Property Behavior of Segmented Copolymers." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29390.

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Segmented copolymers are a commercially important class of materials that are utilized in a wide variety of applications. In these systems a relatively large number of variables such as backbone chemistry, segment molecular weight, and the overall molecular weight of the copolymer can be independently controlled to engineer materials with targeted properties. Such versatility also means that a large number of variables can influence the morphology and therefore, properties and performance of segmented copolymers. In this dissertation, the influence of selected variables on the solid state stru
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45

Bertrand, Arthur. "Élaboration d’agents de transfert fonctionnalisés, précurseurs de copolymères supramoléculaires par liaisons hydrogène et interactions hôte/invité." Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0157/document.

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Au cours de la dernière décennie, quelques (rares) exemples de copolymères à blocs présentant des liens supramoléculaires entre les blocs constitutifs ont été décrits. En raison du caractère réversible de l’association des blocs macromoléculaires, de tels polymères sont d’un grand intérêt pour le développement de matériaux nanostructurés, ayant des propriétés auto-cicatrisantes ou à processabilité améliorée. L’objectif principal de cette thèse est d’élaborer de nouvelles architectures supramoléculaires, en combinant la polymérisation RAFT et l’association spécifique par liaisons H des groupeme
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46

Siyambalagoda, Gamage Pubudu Hasanka. "Synthesis and applications of ruthenium(II)quaterpyridinium complexes and Poly-N-isopropylacrylamide/ acrylic acid copolymers." Diss., Kansas State University, 2009. http://hdl.handle.net/2097/4621.

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Doctor of Philosophy<br>Department of Chemistry<br>Stefan Bossmann<br>Tris-homoleptic ruthenium(II)-quaterpyridyl and quaterpyridinium complexes, with +8 and +14 charge were synthesized by utilizing high pressure reaction pathway. These complexes have diameters ranging from 1.82 to 4.55 nm according to the molecular modeling calculations. These ruthenium complexes are highly luminescent and contain long excited state life times. The novel ruthenium(II)-quaterpyridinium complexes exhibit superior reactivity as sensitizer-relay-assemblies (SRA‟s) in sacrificial systems for water and carbon dioxi
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47

Schmid, Christina Maria [Verfasser], and C. [Akademischer Betreuer] Barner-Kowollik. "Efficient Switching of RAFT to Hydroxyl Capped Polymers as a Versatile Scaffold for Block Copolymer Synthesis : and their Characterization with Advanced Hyphenated Techniques / Christina Maria Schmid. Betreuer: C. Barner-Kowollik." Karlsruhe : KIT-Bibliothek, 2012. http://d-nb.info/102511437X/34.

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48

Hussein, Naji. "Enhancement of the mechanical performance of semi-crystalline polyamides by tailoring the intermolecular interaction in the amorphous phase." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0140/document.

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L’utilisation du Polyamide 66 dans l’industrie automobile est en forte croissance car il offre à un bon compromis légèreté/propriétés mécaniques pour les applications de structure. A noter que pendant le service d’un véhicule, les pièces en polyamides sont souvent soumises à des sollicitations mécaniques très sévères aboutissant à une dégradation progressive du matériau. Récemment. E. Mourglia-Seignobos (thèse 2009), a montré que l’endommagement du polyamide 66 implique des mécanismes de cavitation et de microcraquelure dans la phase amorphe. Afin d'améliorer la durabilité de ce matériau, nous
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49

Rim, Nae Gyune. "Micropatterned cell sheets as structural building blocks for biomimetic vascular patch application." Thesis, 2018. https://hdl.handle.net/2144/30707.

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To successfully develop a functional tissue-engineered vascular patch, recapitulating the hierarchical structure of vessel is critical to mimic mechanical properties. Here, we use a cell sheet engineering strategy with micropatterning technique to control structural organization of bovine aortic vascular smooth muscle cell (VSMC) sheets. Actin filament staining and image analysis showed clear cellular alignment of VSMC sheets cultured on patterned substrates. Viability of harvested VSMC sheets was confirmed by Live/Dead® cell viability assay after 24 and 48 hours of transfer. VSMC sheets stack
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50

Hanauer, Nicolas. "Fabrication et caractérisation de matrices polymériques structurées pour le génie des tissus articulaires." Thèse, 2017. http://hdl.handle.net/1866/19856.

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