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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 6 of 6 for “"Polyacetal"”.
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Synthesis and Characterization of a Novel Polyacetal & Design and Preparation of Superhydrophobic Photocatalytic Surfaces
<p>Polyacetal polymers are thermoplastic resins that play an important role in industry because of numerous industrial applications including automobile; household appliance; <em>etc</em>. The first part of this thesis (Chapter 2) is about the synthesis of a new acetal copolymer that exhibits …
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An assessment of polymeric materials and surface treated steels as cavitation erosion resistant materials
… hydraulic fluid has been investigated for both polyacetal and ultra high molecular weight polyethylene samples in order to simulate service conditions. The polyacetal samples showed improved erosion resistance relative to the samples stored in air or water (3 weeks at 70°C). In contrast, the …
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Pulverspritzgießen in der Mikrotechnik
… Als Bindersystem diente Catamold, das auf Polyacetal basiert und katalytisch entbindert wird. Die kleinsten erfolgreich gesinterten Strukturdetails lagen für Carbonyleisen bei 70 µm und für Aluminiumoxid bei 10 µm. <br>In den Spritzgießxperimenten zeigte sich, daß die für den …
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PH-responsive polymeric materials for encapsulation and triggered release
… portion of the dissertation concerns a novel polyacetal that utilizes a new mechanism to facilitate degradation. A small molecule model compound containing the novel acetal moiety was synthesized and confirmed by NMR to show the expected degradation products under an acidic environment. Linear …
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Studies in synthetic carbohydrate chemistry: Part 1. Nitromethane cyclization of sugar polyaldehydes with a view to the synthesis of nitrocyclodextrins. Part 2. Approaches to the synthesis of 2-(R)-fluoro-daunosamine, a carbohydrate moiety for an antitumor drug.
… reduction and acetylation to give a macrocyclic polyacetal. Nitromethane condensation of the polyaldehyde resulted in "nitro 6-deoxy-beta-CD". Part II. In an attempt to synthesize of 2(R )-fluorodaunosamine, a carbohydrate moiety for an antitumor antibiotic 2'-(R)-fluorodaunorubicin, a possible …
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Dendritische Polyglycerine als hochfunktionale Träger für die multiparallele organische Synthese
Im Rahmen dieser Promotionsarbeit wurden dendritische Polyglycerine (PG) als neue Alternativen zu den etablierten Polystyrol-Festphasen synthetisiert und auf Ihre Eignung in der multiparallelen organischen Synthese untersucht. Diese hochbeladbaren löslichen Trägersysteme basieren auf einem …