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  • 1
    Electronic Resource
    Electronic Resource
    Polyoxazoline auf fettchemischer Basis (1994)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 223 (1994), S. 217-233 
    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: Es wurde ein neues, wirtschaftliches Verfahren zur Herstellung von 2-Alkyl-2-oxazolinen mit gesättigten, ungesättigten und OH-funktionellen Alkylresten entwickelt, durch das Fettsären in polymerisierbare Monomere umgewandelt werden können.Die kationische Polymerisation der Fettalkyloxazoline wurde in unpolaren Lösungsmitteln und in Substanz untersucht. Sie verläft nach einem lebenden Mechanismus. Die Polymerisation ist gegen Verunreinigungen wie Wasser oder Ethanolamid bemerkenswert inert. Für die Substanzpolymerisation von 2-Pentadecyl-2-oxazolin wurde die Reaktionsenthalpie ΔH mit 85,9 kJ/mol bestimmt.
    Notes: A new, economic technique was developed for the production of 2-alkyl-2-oxazolines with saturated, unsaturated or OH-functionalized alkylrests. In the process the fatty acids are changed into polymerizable monomers.The cationic polymerization of fattyalkyl-2-oxazolines was investigated in unpolar solvents and in bulk. It reacts in a living mechanism. The polymerization is remarkable inert against impurities like water or ethanolamide. A reaction enthalpy of ΔH = 85,9 kJ/mol was found for the bulk polymerization of 2-pentadecyl-2-oxazoline.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1994.052230116
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetic investigation of the bromate-ascorbic acid-malonic acid system (1981)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 13 (1981), S. 1277-1288 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: According to our experiments the bromide ion concentration exhibits in the bromate-ascorbic acid-malonic acid-perchloric acid system three extrema as a function of time. To describe this peculiar phenomenon, the kinetics of four component reactions have been studied separately. The following rate equations were obtained:Bromate-ascorbic acid reaction: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} { - d[{\rm BrO}_3^ -]/dt = k_1 [{\rm BrO}_3][{\rm H}_2 {\rm A],}} & {k_1 = 8.3 \times 10^{ - 3} M^{ - 1} \cdot {\rm s}^{ - {\rm 1}} } \\ \end{array} $$\end{document}Bromate-bromide ion reaction: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} { - d[{\rm BrO}_3^ -]/dt = k_2 [{\rm BrO}_3][{\rm Br}^ -][{\rm H}^ +]^2,} & {k_2 = 3.6M^{ - 3} \cdot {\rm s}^{ - 1} } \\ \end{array} $$\end{document}Bromide-ascorbic acid reaction: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} { - d[{\rm Br}_{\rm 2}]/dt = k_3 [{\rm Br}_2][{\rm H}_2 {\rm A],}} & {k_3 \ge 1.7 \times 10^{ - 3} \cdot {\rm s}^{ - 1} } \\ \end{array} $$\end{document}Bromine-malonic acid reaction: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} { - d[{\rm Br}_{\rm 2}]/dt = k_4 k_4 [{\rm Br}_2][{\rm H}_2 {\rm M}]/(k_4 + k_5 [{\rm Br}_2]),} & {k_4 = 6 \times 10^{ - 3} {\rm s}^{ - 1} } \\ \end{array}, \quad {\rm }k_{ - 4} \ge 1.7 \times 10^{ - 3} \cdot {\rm s}^{ - 1} \quad {\rm }k_5 \ge 1 \times 10^7 M^{ - 1} \cdot {\rm s}^{ - 1} $$\end{document} k4 = 6 × 10-3 s-1, k-4 ≥ 1.7 × 103 s-1, k5 ≥ 1 × 107M-1 · s-1Taking into account the stoichiometry of the component reactions and using these rate equations, the concentration versus time curves of the composite system were calculated. Although the agreement is not as good as in the case of the component reactions, it is remarkable that this kinetic structure exhibits the three extrema found.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550131207
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  • 3
    Electronic Resource
    Electronic Resource
    Process analysis of electroless nickel deposition baths by Raman spectroscopy (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 25 (1994), S. 31-41 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In a test experiment carried out in a small compact electroless plating facility, the concentrations of hypophosphite and phosphite in a nickel deposition bath of the Kanigen type were monitored on-line with a dispersive Raman spectrometer. From the results, which agreed with off-line Fourier transform (FT) IR data within ca. 10%, the molar amounts of nickel, hypophosphite and phosphite consumed and formed were calculated and compared with the stoichiometry of the nickel plating process adopted. In addition, nickel bath samples were also measured with an FT Raman spectrometer to compare the performances of both Raman techniques with a view to their application to aqueous solutions.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250250106
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