Synthesis, characterization and modification of hyperbranched polyether polyol copolymers

dc.contributor.authorSeiwert, Jan
dc.date.accessioned2017-08-29T20:38:57Z
dc.date.available2017-08-29T22:38:57Z
dc.date.issued2017
dc.description.abstractThis thesis aims to develop and improve the synthesis, characterization and modification of hyperbranched polyether polyol copolymers based on glycidol as a branching agent and other epoxide monomers, particularly ethylene oxide (EO), propylene oxide (PO) and 1,2-butylene oxide (BO). Chapter 1 summarizes the state of the art concerning the synthesis of star-shaped and hyperbranched polymers from ethylene oxide, propylene oxide and 1,2-butylene oxide. Furthermore, it provides an overview of the synthesis, properties, and applications of poly(propylene oxide), poly(butylene oxide) and higher poly(alkylene oxide)s in general. Novel synthetic strategies and detailed characterization methods for hyperbranched poly(alkylene oxide)s are presented in Chapter 2. Hyperbranched poly(ethylene oxide) (hbPEO) and thermoresponsive hyperbranched poly(butylene oxide) (hbPBO) copolymers are prepared both by batch procedures and by applying the slow monomer addition (SMA) technique. In contrast to the batch procedures, the SMA technique enables precise control over the molar masses of the resulting materials. Analytical ultracentrifugation (AUC), intrinsic viscosity, translational diffusion measurements and SEC are combined to determine the molar masses absolutely. The different copolymerization kinetics of the multibranching ring-opening anionic copolymerizations of glycidol with EO, PO and BO are revealed by online 1H NMR kinetic experiments. The application of hyperbranched poly(alkylene oxide)s as multifunctional initiators for the synthesis of various types of multiarm star copolymers is presented in Chapter 3. Various polyether-polycarbonate multiarm star copolymers are prepared by copolymerization of CO2 with PO and BO from different hyperbranched poly(alkylene oxide) cores. Ultra-high molar mass polyether-polystyrene multiarm star copolymers are synthesized by atom transfer radical polymerization (ATRP), starting from a hbPEO core. Chapter 4 focuses on the multibranching copolymerization of glycidol with a thioether-functional comonomer, 2 (methylthio)ethyl glycidyl ether (MTEGE). The resulting materials are oxidation-responsive and provide various options for orthogonal post-polymerization modification.en_GB
dc.identifier.doihttp://doi.org/10.25358/openscience-2537
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/2539
dc.identifier.urnurn:nbn:de:hebis:77-diss-1000014788
dc.language.isoeng
dc.rightsInC-1.0de_DE
dc.rights.urihttps://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc540 Chemiede_DE
dc.subject.ddc540 Chemistry and allied sciencesen_GB
dc.titleSynthesis, characterization and modification of hyperbranched polyether polyol copolymersen_GB
dc.typeDissertationde_DE
jgu.description.extentviii, 274 Seiten
jgu.organisation.departmentFB 09 Chemie, Pharmazie u. Geowissensch.
jgu.organisation.nameJohannes Gutenberg-Universität Mainz
jgu.organisation.number7950
jgu.organisation.placeMainz
jgu.organisation.rorhttps://ror.org/023b0x485
jgu.organisation.year2017
jgu.rights.accessrightsopenAccess
jgu.subject.ddccode540
jgu.type.dinitypePhDThesis
jgu.type.resourceText
jgu.type.versionOriginal worken_GB
opus.date.accessioned2017-08-29T20:38:57Z
opus.date.available2017-08-29T22:38:57
opus.date.modified2017-09-06T10:22:06Z
opus.identifier.opusid100001478
opus.institute.number0905
opus.metadataonlyfalse
opus.organisation.stringFB 09: Chemie, Pharmazie und Geowissenschaften: Institut für Organische Chemiede_DE
opus.subject.dfgcode00-000
opus.type.contenttypeDissertationde_DE
opus.type.contenttypeDissertationen_GB

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