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  • Chemical Engineering  (2)
  • spillover through the gas phase  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 71 (2000), S. 335-341 
    ISSN: 1588-2837
    Keywords: Indirect catalysis ; spillover through the gas phase ; hydrogen spillover
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Earlier investigations revealed that glass surfaces may get catalytic properties by hydrogen spillover. Occasional activations by oxyhydrogen reaction, observed there, were executed systematically now and revealed high and stable degrees of activity of glass activated in this way. The activation energies for the hydrogenation of cyclohexene on the glass 'catalyst' are 18.1 kJ mol-1 (T 〉 367 K) 33.6 kJ mol-1 (T 〉 367 K)
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 71 (2000), S. 325-333 
    ISSN: 1588-2837
    Keywords: Hydrogen spillover ; spillover through the gas phase ; indirect catalysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The deactivation kinetics of spillover hydrogen in the gas phase was investigated by systematic variation of the distance between catalyst and reaction compartment. It turned out to be a first-order reaction. Glass surfaces strongly accelerate the deactivation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 23 (1983), S. 394-398 
    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 mechanical behavior of polyurethane-poly(methyl methacrylate) interpenetrating polymer networks (PUR/PAc IPN's) was investigated. Stress-strain and impact resistance measurements were made on IPN's with a variable PUR content. The effect of the degree of crosslinking of each network on the mechanical properties was also studied. It appears that only the ultimate elongation varies largely upon changing the crosslink degree. The results are interpreted in terms of the contribution of each network to the mechanical behavior, but also by the interpenetration of both components and by the phase continuity of the PAc network.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 17 (1977), S. 803-805 
    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: Star-shaped block copolymers were used as heat activated adhesives in glass to glass joints. The branches consisted in either AB or ABA poly(styrene-b-isoprene) block copolymers. Tensile shear strengths of simple lap joints were measured for star block copolymers differing in the length or in the number of branches. Values higher than those of the corresponding linear species were obtained. These results were related to the presence of chemical junction points created by coupling the linear copolymers.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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