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  • 1
    Electronic Resource
    Electronic Resource
    NMR spectroscopic studies on the complex of acrylonitrile with AlEt3 or AlEtCl2 in toluene (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 12 (1974), S. 153-159 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.130120309
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  • 2
    Electronic Resource
    Electronic Resource
    Electron spin resonance studies of γ-irradiated cellulose. I. Free radicals in decrystallized cellulose (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 18 (1974), S. 3379-3386 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The types of free radicals formed in decrystallized cellulose prepared from cellulose I and II after γ-irradiation in nitrogen atmosphere at room temperature were studied by ESR spectroscopy. X-Ray diffraction revealed that decrystallized cellulose I and II have the same microstructure. The ESR spectra obtained with the γ-irradiated decrystallized samples are simple. By contacting the irradiated sample with moisture in nitrogen atmosphere, the ESR spectrum changed to a narrow singlet, which gradually decreased in intensity until the spectrum completely disappeared. It was found that the types of free radicals generated in the decrystallized cellulose by γ-irradiation consist of the overlap of singlet and doublet. The singlet spectrum is mainly attributed to alkoxyl radical formed by the rupture of glycosidic linkage at the C 1 or C 4 position, and the doublet spectrum is ascribed to radical formed by hydrogen abstraction from the C 1 position in cellulose molecule.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1974.070181117
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  • 3
    Electronic Resource
    Electronic Resource
    Electron spin resonance studies of γ-irradiated cellulose. II. Free radicals in accessible regions to water in cellulose I and cellulose II (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 18 (1974), S. 3387-3396 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The types of free radicals produced in the water-accessible regions of cellulose I and cellulose II fibers by γ-irradiation in nitrogen atmosphere at room temperature were studied by ESR spectroscopy. The ESR spectra of the irradiated cellulose I and II change by contacting the fibers with water, and after immersion in water the spectral shape depends on the orientation of the fiber axes to the magnetic field. These spectra are probably related to the free radicals generated in the highly ordered regions inaccessible to water in irradiated cellulosic fibers. The ESR spectrum of free radicals generated in decrystallized cellulose after irradiation consists of a singlet and a doublet. When the ESR spectra of free radicals formed in the highly ordered regions of cellulose I and II and the singlet and the doublet are combined in adequate ratio, the constructed spectra are similar to those of the radicals scavenged by water in the irradiated cellulose I and II fibers. From these facts, the spectra due to the free radicals in the water-accessible regions in irradiated cellulose I and II are considered to consist of the singlet and the doublet formed by free radicals in the typical amorphous regions and the spectra of other types of radicals generated in the semicrystalline regions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1974.070181118
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  • 4
    Electronic Resource
    Electronic Resource
    Photodegradation behavior of some vinyl ketone copolymersPresented at the 5th Meeting of the Japan Industrial Technology Association, Japan, Tokyo, September 27, 1971. (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 164 (1973), S. 159-169 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Das lichtinduzierte Zersetzungsverhalten von Copolymeren aus Styrol (St), α-Methylstyrol (α-MSt) und Methacrylsäuremethylester (MMA) mit Methylvinylketon (MVK) und Phenylvinylketon (PVK) wurde in Gegenwart von Luft im festen Zustand und in Lösung untersucht.Die Photolyse von St/MVK- oder St/PVK-Copolymeren erfolgt rasch, und mit zunehmendem Gehalt an Ketogruppen im Copolymeren steigt die Geschwindigkeit der Zersetzung.Im allgemeinen zersetzen sich St/PVK-Copolymere schneller als St/MVK-Copolymere. Die Zersetzung erfolgt wahrscheinlich hauptsächlich nach einem NORRISH-Mechanismus (Typ II).Die Photolyse von α-MSt/PVK-Copolymeren erfolgte erheblich langsamer als die von St/PVK-Copolymeren.Ein unerwartetes Verhalten zeigten MMA/MVK- und MMA/PVK-Copolymere. Diese Copolymeren zersetzten sich sehr schnell, obwohl man eine langsame Zersetzung erwartet hätte. Zur Erklärung dieses Phänomens wurden einige Experimente durchgeführt.
    Notes: Photodegradation behavior for copolymers of styrene (St), α-methyl styrene (α-MSt) and methyl methacrylate (MMA) with methyl vinyl ketone (MVK) and phenyl vinyl ketone (PVK) in the presence of air was investigated in the solid state and in solution.Photolysis of St/MVK and St/PVK copolymers proceeded smoothly and an increase of the ketone in the copolymer resulted in an increase of the rate of degradation. Generally, the rate of degradation is faster in St/PVK copolymers than in St/MVK copolymers. It is likely that the degradation of the copolymers takes place mainly through NORRISH type II reaction.It was found that the photolysis of α-MSt/PVK copolymers was retarded considerably as compared with St/PVK copolymers.An unexpected behavior was observed in the case of MMA/MVK or MMA/PVK copolymers. These copolymers were expected to degrade with slow rates; they degraded, however, rapidly. Some experiments were done to explain this phenomenon.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021640116
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  • 5
    Electronic Resource
    Electronic Resource
    Electrochemical polymerization of acenaphthylene (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 173 (1973), S. 233-234 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021730116
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  • 6
    Electronic Resource
    Electronic Resource
    Studies on the structure of polyurethane elastomers, 4Part 3: cf.2.. NMR spectra of linear polyurethane based on 2,4-tolylenediisocyanate (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 3425-3436 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wird gezeigt, daß Harnstoff- und Carbamoyl-(Urethan-)Gruppierungen in 2,4-Tolylendiisocyanat(1)-Derivaten durch ihre verschiedene chemische Verschiebung unterschieden werden können, wenn NMR-Messungen in N,N-Dimethylacetamid durchgeführt werden, das LiCl enthält. Die Methode kann ferner für die Analyse von Polyurethan Präpolymeren, dargestellt aus α-(Hydroxytetramethylen)-ω-hydroxypoly(oxytetramethylen) (2) und 1, angewandt werden.
    Notes: It is shown that urea and carbamoyl (urethane) groups in derivatives of 2,4-tolylenediisocyanate (1) can be differentiated by their chemical shifts when the NMR measurements are carried out in N,N-dimethylacetamide (DMA) which contains lithium chloride. This method can further be applied to the analysis of linear polyurethane prepolymers prepared from α-(hydroxytetramethylene)-ω-hydroxypoly(oxytetramethylene) (2) and 1.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021751209
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  • 7
    Electronic Resource
    Electronic Resource
    Polyelectrolyte complex of sodium dextran sulfate with chitosan (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 3593-3596 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021751223
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  • 8
    Electronic Resource
    Electronic Resource
    Studies on the structure of polyurethane elastomers. III. Characterization of linear polyurethanes by NMR-spectroscopy: Components and molecular weight (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 153 (1972), S. 189-200 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die NMR-Methode wurde für die Analyse von linearen Polyurethanen und für deren Molekulargewichtsbestimmungen angewandt.Das Zahlenmittel des Molekulargewichts kann aus dem gemessenen Verhältnis der Kernresonanzintensitäten der Kettenglieder im Inneren der Ketten zu denen der Endgruppen bestimmt werden.
    Notes: The NMR method was applied to the analysis of linear polyurethanes and also for their molecular weight determination. The number-average molecular weight can be calculated from the ratio of NMR absorption intensity corresponding to chain segments of polymers to that of end groups.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021530116
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  • 9
    Electronic Resource
    Electronic Resource
    Formaldehyde polymers, 15Part 14, cf.1.. Isolation and mass spectral behavior of 3,3′-methylenebis(5-methyl-1,2-phenyleneoxy)dipropionic acid and 3-{2,6-bis[2-(2-carboxyethoxy)-5-methylbenzyl]-4-methylphenoxy}propionic acid (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 174 (1973), S. 225-229 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021740119
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  • 10
    Electronic Resource
    Electronic Resource
    Carbon-13 NMR spectra of retinal1 and its related compounds (1974)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 6 (1974), S. 487-491 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbon-13 NMR spectra of all-trans retinal1 and vitamin A1 were measured by the pulse Fourier transform method in CCl4. All peaks in these spectra were assigned from considerations of chemical shifts, half proton-decoupled spectra, spin-lattice relaxation times and induced chemical shift by the addition of shift reagent. The carbon-13 NMR spectrum was also measured for all-trans retinal1 which had been exposed to the sunlight for three hours, and the induced isomer was proposed to be 11-s-cis retinal1.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270060907
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