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  • 11
    Electronic Resource
    Electronic Resource
    Effect of sulfur mustard on microhardness of poly(ethylene terephthalate) films (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 60 (1996), S. 147-151 
    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 effect of sulfur mustard (SM), a well-known chemical warfare agent on the microhardness of two poly(ethylene terephthalate) (PET) films was investigated at different loads. SM induces hardness in PET films, perhaps due to an antiplasticizing effect. Heat treatment of the films enhanced their microhardness. The heat-set films show a further increase in their microhardness after exposure to SM. These results were supported by physicochemical techniques like plasma and amine etching, which revealed complex etching phenomena giving rise to a structure-specific pattern. The film having a higher weight loss due to plasma and amine etching showed lower microhardness. © 1996 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 12
    Electronic Resource
    Electronic Resource
    Phenacyldimethylsulfonium ylide-mercuric chloride complex initiated radical polymerization of 4-vinyl pyridine (1991)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 42 (1991), S. 548-550 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Polymerisation von 4-Vinylpyridin bei Initiierung durch einen Komplex aus Phenacyldimethylsulfoniumylid und quecksilberchlorid wurde untersucht. Die Polymerisation wird in Gegenwart von Hydrochinon beziehungsweise Benzen verzögert und durch Dimethylformamid beschleunigt. Ein Mechanismus der Radikalbildung wird vorgeschlagen.
    Notes: The polymerization of 4-vinyl pyridine initiated by phenacyldimethylsulfonium ylide complex of mercuric chloride is investigated. The polymerization reaction is retarded in the presence of hydroquinone and benzene, but accelerated by dimethylformamide. A mechanism for the radical formation is suggested.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1991.010421103
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  • 13
    Electronic Resource
    Electronic Resource
    Synthesis and properties of interpenetrating networks from acrylates of d-block elements (1996)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 47 (1996), S. 224-227 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Systematic synthesis of interpenetrating polymer networks (IPN) from poly(chromium acrylate) (PCrA) and zinc acrylate (ZnA) using divinyl benzene (DVB) as crosslinker has been carried out. Swelling studies and scanning electron microscopy (SEM) were performed to examine the extent of crosslinking and phase behavior of the IPN. The crosslinking decreases with the increase of linear polymer concentration and its molecular weight, respectively. On the other hand, it increases with the increase of concentration of crosslinking agent and monomer II, respectively. The IPN was found to be thermally stable up to 300 °C.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1996.010470506
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  • 14
    Electronic Resource
    Electronic Resource
    Representation of culture transition states in A. suboxydans (1998)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 73 (1998), S. 23-30 
    Details
    ISSN: 0268-2575
    Keywords: vitamin C ; structured mathematical model ; continuous culture kinetics ; sorbose ; sorbitol ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The kinetics of the biotransformation of D-sorbitol to L-sorbose by Acetobacter suboxydans (NRRL B-72) features both substrate and product inhibition. Model-based reactor operating strategies can eliminate the inhibitions and improve the yield and productivity of the fermentation. Unstructured models are usually unable to acknowledge complex intracellular physiological changes and therefore their application to dynamic growth conditions is limited. By considering RNA as a bottleneck growth limiting compound a structured mathematical model was developed to describe the transient growth of Acetobacter suboxydans. The model parameters were determined by a non-linear regression technique which minimized the deviation between the model prediction and the experimental (extracellular and intracellular) continuous culture data. The model was used to simulate the transient culture behaviour during the step-down in the dilution rates (from 0·1 h-1 to 0·05 h-1) in the continuous culture experiments. The experimental results and the model simulation results showed reasonable agreement. © 1998 Society of Chemical Industry
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 15
    Electronic Resource
    Electronic Resource
    Poly(N-vinyl pyrrolidone) as a template for the radical polymerization of 4-vinyl pyridine (1991)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 42 (1991), S. 281-285 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Wechselwirkungskoeffizient zwischen Poly(N-vinylpyrrolidon) und Poly(4-vinylpyridin) wurde in Lösungen von Mischungen dieser Polymere in verschiedenen Lösungsmitteln bestimmt. Die Ergebnisse zeigen die Bildung von Komplexen der beiden Polymere. Maximale Komplexbildung wurde beim molaren Verhältnis 1:1 gefunden. Kinetik und Mechanismus der Polymerisation von 4-Vinylpyridin in Dimethylformamid mit Poly(N-vinylpyrrolidon) als Matrix wurden untersucht.
    Notes: The coefficient of interaction between poly(N-vinyl pyrrolidone) and poly(4-vinyl pyridine) is determined in solutions of the mixture of these two polymers in different solvents. The results show the complexation of the polymers. Maximum complexation occurred at molar ratio 1:1. The kinetics and mechanism of polymerization of 4-vinyl pyridine in dimethylformamide with poly(N-vinyl pyrrolidone) as a template is investigated.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1991.010420611
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    Paper (German National Licenses)
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