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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of fluorinated polymers: Several approaches by wide-line nuclear magnetic resonance (1989)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 190 (1989), S. 2815-2819 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Two different ways of analyzing the composition of insoluble, partly hydrogenated, partly fluorinated copolymers by NMR are described. The first relies on a quantitative comparison of 1H and 19F free induction decays, as observed in the solid state, with those of reference samples. The second relies on medium resolution spectra which can be achieved, thanks to the large scale of 19F chemical shifts, on softening of the samples at high temperature. A special probe working up to 400°C was built for this purpose. The two methods are in good agreement in the case of vinylidene fluoride (VF2)/tetrafluoroethylene (VF4) copolymers, leading to a determination of the rectivity ratios; the special usefulness of the second method is illustrated by the identification of a third comonomer in VF2/VF4 terpolymers.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1989.021901113
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  • 2
    Electronic Resource
    Electronic Resource
    Factors affecting the promoted aggregation and coalescence of synthetic rubber particles (1964)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2049-2065 
    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: Small particles (ca. 700 A.) in an SB-R latex can be agglomerated (aggregation and coalescence) to the large size and heterogeneous distribution required for fluid high solids latex. This agglomeration is promoted by high molecular weight materials such as polyvinyl methyl ether (PVM). The mechanism of this agglomeration has been investigated. The effects of controlled variations in the amounts of PVM, electrolyte, soap and latex solids content were determined using statistically designed experiments. The agglomeration was found to differ from Smoluchowski kinetics in that it could best be described by the relationship: (1/n) = (1/n0) + at - bt2 where n = particle number, t = time and a and b are constants. The agglomeration rates were about 1011 to 1012 times slower than the theoretical Smoluchowski rapid coagulation rate. Increases in PVM, soap, and latex solids increased the agglomeration rate. The agglomerations were self-limiting and reached equilibria the level of which increased with increases in PVM and decreased with increases in soap. Regression equations relating the effects of the controlled variables on the agglomeration rate and the equilibria states are derived and presented graphically. The particle size distribution of the final latex was significantly correlated, with that expected from theoretical collision theory.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1964.070080509
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  • 3
    Electronic Resource
    Electronic Resource
    Die Fällung des Ammoniumvanadates durch Ammoniumchlorid (1902)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 32 (1902), S. 174-180 
    Details
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19020320124
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  • 4
    Electronic Resource
    Electronic Resource
    Die Anwendung des Zinks zur Reduktion bei der Bestimmung von Vanadinsäure (1903)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 35 (1903), S. 420-423 
    Details
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19030350156
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  • 5
    Electronic Resource
    Electronic Resource
    Die spezifische Wärme fester Stoffe bei konstantem Volumen und das Gesetz von Dulong und Petit (1907)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 55 (1907), S. 200-204 
    Details
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19070550117
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  • 6
    Electronic Resource
    Electronic Resource
    Surface treatment of an epoxy resin by CO2 laser irradiation (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 238 (1996), S. 177-189 
    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: Der Einfluß von CO2-Laserstrahlung auf die Oberflächeneigenschaften eines Epoxid-Laminierharzes (wärmebeständig bis 120°C) für kohlefaserverstärkte Kunststoffe (CFK) wird untersucht. Infrarot- und XPS-Spektroskopie zeigen, daß die Hydroxygruppen des Harzes unter Bildung von Doppelbindungen eliminiert werden. In Kohlendioxidatmosphäre werden tiefer liegende Teile des Harzes modifiziert als bei der Behandlung in Luft. Eine Steigerung der Reproduzierbarkeit der Klebfestigkeit des verwendeten CFK auf Basis des untersuchten Harzes ist nur bei gleichzeitiger Verringerung der Klebfestigkeit selbst möglich. Beim Einsatz eines heißhärtenden Klebstoffes kann kein Einfluß der Laserbehandlung auf die Klebfestigkeit festgestellt werden.
    Notes: The influence of CO2 laser radiation on the surface properties of a lamination resin (temperature resistant up to 120°C) which is used for carbon fibre-reinforced plastics (CFRP) is examined. It is shown by XPS and infrared spectroscopy that the hydroxy groups of the resin are eliminated by the laser radiation. Using a carbon dioxide atmosphere, also deeper parts of the resin are influenced compared to the treatment in air. The reproducibility of the bond strength is higher for the laser-treated samples than for untreated samples if a room temperature-curing adhesive is used, but the bond strength itself is lower. Laser treatment shows no influence at all if a hot-curing adhesive is used.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052380115
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  • 7
    Electronic Resource
    Electronic Resource
    Kondensierte Isochinoline, III Untersuchungen über die Reaktivität der s-Triazolo[3.4-a]isochinoline (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3925-3939 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Condensed Isoquinolines, III. Studies on the Reactivity of s-Triazolo[3.4-a]isoquinolinesHMO-Calculations of s-triazolo[3.4-a]isoquinoline (1) reveal a high doublebond character of the C-5/C-6 bond. Halogenaddition, catalytic hydrogenation and oxidation reactions are in experimental agreement. It appears from oxidation reactions of derivatives of 1 that unsaturated side chains are also oxidatively degradated at the same time under the same conditions.
    Notes: Aus HMO-Berechnungen des s-Triazolo[3.4-a]isochinolins (1) geht u. a. ein hoher Doppelbindungscharakter der C-5/C-6-Bindung hervor, was auch experimentell bei Halogenaddition, katalytischer Hydrierung und Permanganat-Oxydation beobachtet wird. Oxydationsreaktionen der Derivate von 1 zeigen, daß ungesättigte Seitenketten unter gleichen Bedingungen gleichzeitig oxydativ abgebaut werden.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711041222
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  • 8
    Electronic Resource
    Electronic Resource
    Reaktionen mit Cyclopropenen, IV. Bildung und Struktur von 2:1-Addukten aus Spirocyclopropenen und Kohlenstoffdisulfid (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 1074-1081 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Cyclopropenes, IV. Synthesis and Structure of 2:1-Adducts from Spirocyclopropenes with Carbon DisulfideIn benzene solution at 140°C in a steel bomb the spirocyclopropenes 1a-d from 2:1-adducts 2a-d with carbon disulfide, the constitution of which has been elucidated by X-ray structure analysis of 2c. Thus, the 2:1-adducts have the structure 2 containing the spiro[thiophene-2(3H), 2′(5′H)-thiophene] as basic system. Possible mechanistic pathways for the selective formation of 2 are discussed.
    Notes: Die Spirocyclopropene 1a-d bilden mit Kohlenstoffdisulfid in benzolischer Lösung bei 140°C im Autoklaven die 2:1-Addukte 2a-d, deren Konstitution durch eine Röntgenstrukturanalyse von 2c ermittelt wurde. Danach besitzen die 2:1-Addukte die Struktur 2, in der das Spiro[thiophen-2(3H), 2′(5′H)-thiophen] als Grundsystem enthalten ist. Mechanistische Vorstellungen zur selektiven Bildung von 2 werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811140324
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  • 9
    Electronic Resource
    Electronic Resource
    Reaktionen mit Cyclopropenen, III. tert-Butylamino-substituierte Aromaten durch Photocyclisierung von N-tert-Butyl(arylvinyl)keteniminen (1979)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 3166-3170 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Cyclopropenes, III. tert-Butylamino-Substitued Aromatic Compounds by Photocyclization of N-tert-Butyl(arylvinyl)ketene IminesN-tert-Butyl(arylvinyl)ketene imines 2a-g, obtained by ring-cleavage of the cyclopropenes 1a-g with tert-butyl isocyanide, cyclize on irradiation in a hexatriene-cyclohexadiene isomerisation with subsequent 1,7-hydrogen transfer to the tert-butylamino-substituted aromatic compounds 4a-f and 4g.
    Notes: Die durch Ringspaltung der Cyclopropene 1a-g mit tert-Butylisocyanid erhaltenen N-tert-Butyl-(arylvinyl)ketenimine 2a-g cyclisieren beim Bestrahlung in einer Hexatrien-Cyclohexadien-Isomerisierung mit anschließender 1,7-Wasserstoffverschiebung zu den tert-butylamino-substituierten Aromaten 4a-f und 4g.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19791120914
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  • 10
    Electronic Resource
    Electronic Resource
    Reaktionen mit Diazoazolen, VII. 3H-Azolo-1,2,4-triazole durch 1,8- bzw. 1,12-Elektrocyclisierungen von 3H-Pyrazol-3-on- bzw. 3H-Indazol-3-on-(diorganylmethylen)hydrazonen (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1726-1747 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Diazoazoles, VII. 3H-Azolo-1,2,4-triazoles by 1,8- or 1,12-Electrocyclizations of 3H-Pyrazol-3-one- or 3H-Indazol-3-one (Diorganylmethylene)hydrazones, Respectively3H-Azolo-1,2,4-triazoles 3 are formed by cycloreactions 2b) of diazoazoles 1 with diazoalkanes 2 and with fluorene--N-, P-, S-ylides 4, respectively, (Method A) or by cyclizing dehydrogenation of diorganylmethanone (1H-azol-3-yl)hydrazones 7 (Method B). In both methods the anellation of the triazol system results from 1,8- or 1,12-electrocyclization of azol-3-one (diorganylmethylene)-hydrazones (azines) 9, as could be shown in the case of the 4-nitrophenyl compound 9dk. - Spectroscopic data (UV, 1H NMR, 13C NMR) of the 3H-azolo-1,2,4-triazoles 3 are discussed.
    Notes: 3H-Azolo-1,2,4-triazole 3 entstehen durch Cycloreaktion2b) von Diazoazolen 1 mit Diazoalkanen 2 bzw. mit Fluoren-N-, P-, S-Yliden 4 (Methode A) oder durch cyclisierende Dehydrierung von Diorganylmethanon-(1H-azol-3-yl)hydrazonen 7 (Methode B). Bei beiden Methoden erfolgt die Triazolanellierung durch 1,8- bzw. 1,12-Elektrocyclisierung von Azol-3-on-(diorganylmethylen)-hydrazonen (Azine) 9, wie im Fall der 4-Nitrophenylverbindung 9dk gezeigt werden konnte. - Spektroskopische Daten (UV, 1H-NMR, 13C-NMR) der 3H-Azolo-1,2,4-triazole 3 werden diskutiert.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170508
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