Darstellung einiger Adipinsäureester des Glycerins und des Trimethylolpropans

Schöllner, R.; Löhnert, P.

doi:10.1002/prac.19680380309

Cited by 3 publications

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Incorporation of a well‐defined polyether side‐chain into segmented poly(ether‐urethane urea) and examination for blood‐compatibility

Hashimoto

Demachi

Nishimata

et al. 1989

Angew. Makromol. Chem.

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A new method of introducing a hydrophilic polyether side chain into segmented polyurethane using a polypropylene oxide macromer with 1,3-diol at one chain-end, which behaves as chain extender, is described. In this procedure, a moleculardesigned side-chain is incorporated quantitatively and directly into polyurethane biomedical elastomer. The design is also of interest to biomaterials in artificial organs. ZUSAMMEIWASSUNG:Es wird eine neue Methode zur Einftihrung von hydrophilen Polyetherseitenketten in segmentierte Polyurethane unter Verwendung eines Polypropylenoxid-Macromeren mit 1,3-Diol-Gruppen an einem Kettenende, die als Kettenverlilngerer fungieren, beschrieben. In diesem ProzeB wird eine Seitenkette quantitativ und direkt in medizinische Polyurethanelastomere eingebaut. Diese Entwicklung ist auch fur Biowerkstoffe in kilnstlichen Organen von Interesse.

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Incorporation of a well‐defined polyether side‐chain into segmented poly(ether‐urethane urea) and examination for blood‐compatibility

Hashimoto

Demachi

Nishimata

et al. 1989

Angew. Makromol. Chem.

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A route to quantitative ¹³C NMR analysis of multicomponent polyesters

Hvilsted

1991

Makromolekulare Chemie. Macromolecular Symposia

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A protocol for quantitative sequential 13C NMR analysis is developed for polyesters composed of trimethylol propane (TMP), neopentyl glycol (NPG), and adipic and isophthalic acids. TMP centred, structural models with methyl adipate and isophthalate branches in all possible combinations are synthesized and purified. A detailed 13C NMR investigation of the models unequivocally allows the identification of the TMP polyester structural sequences through the quaternary TMP carbon multiplicity. Spin‐lattice relaxation times, T1, of model quaternary TMP carbons are in the 2.3–5.2 s range, depending on the size of the specific model. This relaxation behaviour defines the experimental conditions for obtaining the quantitative assessment of all polyester polyol structural sequences based on quaternary TMP and NPG carbons. The special case dealt with here additionally centers all acid moieties between poyols in triads and thus makes quantitative determinations of all polyester constituents possible.

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