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  • 1
    Electronic Resource
    Electronic Resource
    Zweikernkomplexe mit Chlordimethylarsin-Liganden (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1187-1194 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dinuclear Complexes with Chlorodimethylarsine LigandsFrom the hexacarbonyl complexes of chromium, molybdenum, and tungsten via the norbornadiene complexes the compounds cis-M(CO)4[As(CH3)2Cl]2 (1, M = Cr, Mo, W) are formed in good yields. These react with equimolar amounts of carbonylmetalates to give arsenic-bridged dinuclear complexes M′ — As(CH3)2 — M(CO)4 — As(CH3)2Cl (M′ = Mo(CO)3C5H5, W(CO)3C5H5, Mn(CO)5, Re(CO)5, Co(CO)4), which still bear the reactive chlorodimethylarsine ligands. The use of these for further syntheses is demonstrated by the preparation of the heterotrinuclear complex (CO)5Mn — As(CH3)2 — Cr(CO)4 — As(CH3)2 — Re(CO)5.
    Notes: Aus den Hexacarbonylkomplexen des Chroms, Molybdäns und Wolframs lassen sich über die Norbornadienkomplexe in guter Ausbeute die Verbindungen cis-M(CO)4[As(CH3)2Cl]2 (1, M = Cr, Mo, W) gewinnen. Diese setzen sich mit äquimolaren Mengen von Carbonylmetallaten zu den arsenverbrückten Zweikernkomplexen M′ — As(CH3)2 — M(CO)4 — As(CH3)2Cl (M′ = Mo(CO)3C5H5, W(CO)3C5H5, Mn(CO)5, Re(CO)5, Co(CO)4) um, die noch die reaktiven Chlordimethylarsin-Liganden tragen. Deren Verwendbarkeit für weiterführende Synthesen wird durch die Darstellung des Hetero-Dreikernkomplexes (CO)5Mn — As(CH3)2 — Cr(CO)4 — As(CH3)2 — Re(CO)5 demonstriert.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100401
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  • 2
    Electronic Resource
    Electronic Resource
    Zur entschmierung der röntgenkleinwinkelstreukurven von hochpolymeren (1977)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 178 (1977), S. 2079-2087 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A method for slit-hight corrections is described, in which the experimental X-ray small angle scattering curve is represented by a cubic spline function. This method is applied on the theoretical scattering curve of spherical particles with homogenious electron-density and on scattering curves of poly(hexamethylene adipate).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1977.021780722
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  • 3
    Electronic Resource
    Electronic Resource
    13C NMR-Spektroskopische Untersuchungen über den Einfluß anorganischer Salze auf die Solvatation von N,N′-Dibenzoyl-m-phenylendiamin in N,N-Dimethylacetamid (1979)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 180 (1979), S. 1013-1021 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Changes of the solvation sphere of N,N′-dibenzoyl-m-phenlyenediamine (as a model substance for aromatic polyamides) in N,N′-dimethylacetamide caused by electrolytes such as LiCl, LiBr or BeCl2 were studied by 13C NMR chemical shift measurements. The observed variations of the chemical shift data were interpreted by a stronger interaction of the solvent molecules with the carbonamide group. The relation of the carbonyl and the amide group interaction with the solvent or the solvated cations depends on the kind of electrolyte. It is not possible to correlate the obtained results with the influence of these electrolytes upon the molecular weight of the aromatic polyamides prepared in N,N′-dimethylacetamide. Therefore some possible explanations are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1979.021800418
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  • 4
    Electronic Resource
    Electronic Resource
    Massenspektrometrischer Nachweis des cyclischen Trimeren im Polyäthylenterephthalat (1976)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 50 (1976), S. 163-168 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: By direct pyrolysis of commercial polyethyleneterephthalate in the mass spectrometer a content of about 1% of the cyclic trimer ethyleneterephthalate is indicated at temperatures below thermal degradation of the polymer. The comparison with EI- and FD-mass spectra of the authentic cyclic trimer allows its identification without previous isolation.
    Notes: Beim direkten Abbau von kommerziellem Polyäthylenterephthalat im Massenspektrometer läßt sich bei Temperaturen unterhalb des einsetzenden thermischen Abbaus des Polymeren das zu etwa 1% enthaltene cyclische trimere Äthylenterephthalat ohne vorherige Isolierung nachweisen und durch Vergleich mit den EI- und FD-Massenspektren eines authentischen Trimeren identifizieren.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1976.050500114
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  • 5
    Electronic Resource
    Electronic Resource
    Zur ermittlung von Langperioden durch Röntgenkleinwinkelstreuung von Copolyestern (1976)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 52 (1976), S. 143-154 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: A computer method for slit-hight corrections is described, in which the experimental X-ray small angle scattering curve is represented by a cubic spline function. This method is applied on the theoretical scattering-curve of spherical particles with homogeneous electron-density and on scattering-curves of polyhexamethyleneadipate and an aliphatic polyesteramide. For the polyester and the polyesteramide long periods of 150 Å and 118 Å, respectively, were found. By means of this and other physical results considerations of the structure of these materials are given.
    Notes: Es wird ein Verfahren zur Entschmierung von experimentell ermittelten Röntgenkleinwinkel-Streukurven mittels einer elektronischen Rechenanlage beschrieben, bei welchem die Streukurve durch eine kubische Spline-Funktion dargestellt wird. Im einzelnen wird eine Anwendung auf die theoretische Streukurve von Kugeln mit homogener Elektronendichte und auf Streukurven von Polyhexamethylenadipat-Fäden und eines hiervon abgeleiteten aliphatischen Polyesteramids gezeigt. Für den Polyester und das Polyesteramid wurden Langperioden von 150 Å bzw. 118 Å gefunden. Anhand dieser und weiterer physikalischer Daten wurden Überlegungen zur Struktur dieser Materialien durchgeführt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1976.050520113
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  • 6
    Electronic Resource
    Electronic Resource
    Ultraviolet degradation of plastics and the use of protective ultraviolet absorbers (1961)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 1 (1961), S. 21-25 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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 degradation of plastics by ultraviolet energy and the use of protective ultraviolet absorbers to improve stability necessitate studies along several lines. These include (a) the measurement of the ultraviolet spectral energy distribution of sunlight and of the indoor accelerated test sources, (b) the measurement of the extent of degradation as a function of the wavelength of the incident radiation, (c) an estimate of the absorbing effectiveness of the added protective agents, and (d) the stability of the protective ultraviolet absorbers themselves.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760010106
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  • 7
    Electronic Resource
    Electronic Resource
    Bibliography on ultraviolet degradation and stabilization of plastics (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 32-54 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: A bibliography of references from 1957 through 1960 was prepared containing the following sub-headings: Protective Ultraviolet Absorbers, Light Sources, Light Fastness Evaluation, Plastics Degradation and Stabilization Polyesters, Polystyrene, Polyvinylchloride, Polyethylene, Polyacrylo and Methacrylonitrile, Polymethyl Methacrylate, Cellulose Acetate and Nitrate, Polyvinyl alcohol, Polyamides, Wool, Rubber, Silicone Resin, Wood, Dyes and Paint Films, Epoxy, Melamine and Urea Formaldehyde, Oil Films, General Mechanical Degradation, Free Radicals and ESR, Photochemistry, Photochemistry and Spectroscopy at Low Temperatures, Antioxidants and Free Radical Scavengers, Flash Photolysis, Energy Transfer, Phosphorence and the Triplet State, Fluorescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020109
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  • 8
    Electronic Resource
    Electronic Resource
    Investigation of the protective ultraviolet absorbers in a space environment. III. Protective effectivenessPresented at the meeting of the American Chemical Society in Chicago, Illinois, September 4-8, 1961, as part of the Symposium on Organic Coatings in the Space Environment.This research was supported by the United States Air Force under Contract No. AF 33(616)-5945, monitored by the Materials Laboratory, Aeronautical Systems Division, Wright-Patterson Air Force Base, Ohio. (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 1565-1580 
    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 effectiveness of the ultraviolet absorbers in protecting organic coatings exposed to an extraterrestrial environment from photochemical degradation was studied for the commercially available absorbers and certain errocene derivatives. The change in solar absorptivity of the coatings was used as a measure of the degradation incurred, these data being obtained from the ultraviolet, visible, and near-infrared absorption spectra of the polymers. Ultraviolet absorbers of the benzophenone and benzotriazole type used for terrestrial applications were found to be considerably less effective in a space environment. This was attributed to the strong ultraviolet absorption of the polymers at the shorter wavelengths, which competes with the absorber for the incident radiation. Certain benzoyl-substituted ferrocene compounds were found to be extremely effective in protecting many types of polymeric coatings. The benzoylferrocenes are highly colored materials (red to orange) whose absorbing properties are extremely stable to ultraviolet radiation.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070501
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  • 9
    Electronic Resource
    Electronic Resource
    Investigation of the protective ultraviolet absorbers in a space environment. I. Rate of evaporation and vapor pressure studiesThis research was supported in whole or in part by the United States Air Force under Contract No. AF 33(616)-5945, monitored by the Materials Laboratory, Wright Air Development Center, Wright-Patterson Air Force Base, Ohio. (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 45 (1960), S. 35-47 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Compounds which are effective in protecting materials from terrestial ultraviolet radiation may, in a high vacuum environment, suffer loss both by evaporation and by photochemical degradation from the shorter wavelength ultraviolet radiation. The rates of evaporation from a free surface in a high vacuum of the commercially available protective ultraviolet absorbers have been measured as a function of temperature. Vapor pressures of the solid absorbers were calculated from the rate of evaporation data. The equilibrium vapor pressures of the liquid absorbers were determined by a direct vapor spectrophotometric method. Absorbers containing more than one hydroxy group were found to be considerably less volatile than the monohydroxy compounds, probably because of intermolecular hydrogen bonding of the former.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204514504
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  • 10
    Electronic Resource
    Electronic Resource
    Vapor pressure of 2,4,6-triamino-s-triazine (melamine) (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 43 (1960), S. 319-323 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The vapor pressure of melamine was measured in the temperature range of 144-341°C. by the dynamic method, ultraviolet spectrophotometry being used to determine the amounts transferred at the lower vapor pressures. Nitrogen and ammonia were used as carrier gases. The vapor pressures are given by the expression log P = 12.52 - (6440/T). The average heat of sublimation was found to be 29 ± 1 kcal./mole.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204314204
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