Isocyanatfreie Herstellung von kohlenhydratanalogen Polyhydroxyurethanen auf Basis von Erythritoldi- und Sorbitoltri- sowie Vinylencarbonat

Hochschulschrift

Zusammenfassung: Sugar alcohols were used in polyurethane synthesis as polyols or sugar-based polyether polyols, which were cured with isocyanates. Alternatively, polyurethanes can be prepared from sugar alcohol-based cyclic carbonates, which are curable with di- or polyfunctional amines. Compared to isocyanates, cyclic carbonates are less reactive compounds which require high processing temperature and long conversion time. In this work, highly reactive carbohydrate-based carbonates were prepared and afterwards converted with di- and polyfunctional amines to new sugar alcohol-based polyhydroxyurethanes (PHU). The carbonates were successfully synthesized from sugar alcohols meso-erythritol and D-sorbitol as also from new synthetic routs based on butadiene and glycerol, which are not compete with food production. Both BDC and STC undertook in a catalyst free reaction with primary amines a complete conversion at room temperature. Due to the high reactivity of BDC reactive compounding was applied for the first time. New thermoplastic PHU with a molecular weight up to 46 kg/mol were processed in only 20 minutes. Using short and long chained diamines semi-crystalline co- and homopolymers were prepared, which had comparable properties to common isocyanate-based TPU.

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Deutsch
• Anmerkungen: Albert-Ludwigs-Universität Freiburg, Dissertation, 2016

Klassifikation und Themen

• Klassifikation: Chemie
• Schlagwort: Polymere ; Polymeres Netzwerk ; Polyurethane ; Zuckeralkohole ; Nachwachsender Rohstoff ; Makromolekulare Chemie ; Kohlendioxid

Beteiligte, Orts- und Zeitangaben

• Ereignis: Veröffentlichung
• (wo): Freiburg
• (wer): Universität
• (wann): 2016
• Urheber: Schmidt, Stanislaus
• Beteiligte Personen und Organisationen: Mülhaupt, Rolf

Weitere Informationen

• DOI: 10.6094/UNIFR/11355
• URN: urn:nbn:de:bsz:25-freidok-113550
• Rechteinformation: Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 14.08.2025, 10:57 MESZ