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  • Articles  (34)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (34)
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  • Articles  (34)
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  • 1
    Electronic Resource
    Electronic Resource
    On the redistribution of6Li + ions implanted into polypropylene foils (1996)
    Springer
    Applied physics 62 (1996), S. 359-367 
    Details
    ISSN: 1432-0630
    Keywords: 61.80.Th ; 61.40.Km
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract 6Li+ (150 keV) was implanted into thin polypropylene foils at fluences of 1 x 1013 to 1 x 1014 cm−2. Subsequent neutron depth profiling measurements of the Li distributions revealed considerable deviations from the expected ballistic range profiles. This Li redistribution was simulated by a numerical computer calculation. The best fit between measurements and simulations was obtained by assuming that (i) Li redistributes immediately after its ballistic slowing-down, (ii) the Li mobility is enhanced in the radiation-damaged polymer region, the local diffusion enhancement being controlled by the target's electronic damage, (iii) mobile Li is readily trapped at radiation-induced defects, their density being proportional to the target's electronic damage, (iv) these traps are saturable ones, and (v) Li migration is not restricted to the ion track region, but proceeds also through the neighboring unirradiated bulk, though with slower speed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01594234
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of energetic ions on grafting to polyethylene (1996)
    Springer
    Applied physics 63 (1996), S. 441-446 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.40; 61.80; 66.30; 81.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract.  Li salts of acrylic acid were grafted to poly- ethylene, PE. It is known that li is mobile in this material at room temperature, and hence can act as a probe for newly introduced defects. After irradiation of PE(Li) with 100 keV He+ ions at different fluences the Li depth distributions were measured by NDP. Changes in the Li distributions are observed which are ascribed to bonding at oxygen, the latter one preferentially penetrating into the PE via the irradiation-damaged sample surface. With increasing sample age, i.e. after exposure to ambient atmosphere for more than half a year, Li appears to lose its original mobility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01571671
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of energetic ions on grafting to polyethylene (1996)
    Springer
    Applied physics 63 (1996), S. 441-446 
    Details
    ISSN: 1432-0630
    Keywords: 61.40 ; 61.80 ; 66.30 ; 81.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Li salts of acrylic acid were grafted to polyethylene, PE. It is known that li is mobile in this material at room temperature, and hence can act as a probe for newly introduced defects. After irradiation of PE(Li) with 100 keV He+ ions at different fluences the Li depth distributions were measured by NDP. Changes in the Li distributions are observed which are ascribed to bonding at oxygen, the latter one preferentially penetrating into the PE via the irradiation-damaged sample surface. With increasing sample age, i.e. after exposure to ambient atmosphere for more than half a year, Li appears to lose its original mobility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01571671
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  • 4
    Electronic Resource
    Electronic Resource
    Tomographic study of the three-dimensional distribution of a high-fluence implant in a polymer (1999)
    Springer
    Applied physics 68 (1999), S. 429-434 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.72.Hh; 61.72.Ww; 61.80.Jh; 66.30.Jt; 79.20.Wc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 6 Li+ ions were implanted into PMMA at high flux up to fluences of 1×1015 cm-2 under angles of 0° to 70° towards the surface normal. The Li depth distributions were determined by means of neutron depth profiling, and compared with theoretical simulations. The three-dimensional Li distribution was reconstructed from the one-dimensional depth profiles by means of a tomographic technique. It turned out that the measured Li depth distributions can be described by a superposition of Gaussian and exponential functions. This points at considerable Li mobility during or after the ion implantation, with trapping in unsaturable traps in the ion-irradiated region which roughly follow the electronic energy transfer distribution. The Li redistribution is more pronounced along the track direction than transversely to it. The normalized Li distributions in various implantation directions were fed into our tomographic program to reconstruct the three-dimensional distribution of the deposited lithium. As expected, the lithium preferentially distributes along the ion tracks. This work is another hint that mobility of implanted ions in solids does not proceed isotropically, but is strongly influenced by the radiation-damage distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050918
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  • 5
    Electronic Resource
    Electronic Resource
    Kapillarisotachophorese. 1. Mitt. Einrichtung für die proportionale Regelung des Gegenstroms (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 519-519 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01491873
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  • 6
    Electronic Resource
    Electronic Resource
    Precipitation of dissolved alkali salts and fullerenes on surfaces of doped porous matter (1996)
    Springer
    Applied physics 62 (1996), S. 191-195 
    Details
    ISSN: 1432-0630
    Keywords: 81.35 ; 66.30 ; 81.30 ; 61.46
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Standard porcelain samples burnt at different temperatures were doped with LiCl, organo-Li solutions, or with fullerene solution and then dried. The depth profiles of both Li and fullerene were determined. The distributions of the incorporated dopants strongly depend on the samples' porosity. Additional ultrasonic treatment during the diffusion process has a fatal influence on the porcelain structure, resulting in enhanced dopant uptake of the remaining sample. The surface-near shape of the depth profiles is interpreted by solvation, i.e., by precipitation of the dissolved salts or fullerenes in the surface-near zone during the drying process. It is shown that the solvation effect is important only in the case of media with high porosity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01575080
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  • 7
    Electronic Resource
    Electronic Resource
    Precipitation of dissolved alkali salts and fullerenes on surfaces of doped porous matter (1996)
    Springer
    Applied physics 62 (1996), S. 191-195 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.35; 66.30; 81.30; 61.46
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract.  Standard porcelain samples burnt at different temperatures were doped with LiCl, organo-Li solutions, or with fullerene solution and then dried. The depth profiles of both Li and fullerene were determined. The distributions of the incorporated dopants strongly depend on the samples’ porosity. Additional ultrasonic treatment during the diffusion process has a fatal influence on the porcelain structure, resulting in enhanced dopant uptake of the remaining sample. The surface-near shape of the depth profiles is interpreted by solvation, i.e., by precipitation of the dissolved salts or fullerenes in the surface-near zone during the drying process. It is shown that the solvation effect is important only in the case of media with high porosity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01575080
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  • 8
    Electronic Resource
    Electronic Resource
    On the redistribution of 6Li+ ions implanted into polypropylene foils (1996)
    Springer
    Applied physics 62 (1996), S. 359-367 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.80.Th; 61.40.Km
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract.  6Li+ (150 keV) was implanted into thin polypropylene foils at fluences of 1×1013 to 1×1014 cm-2. Subsequent neutron depth profiling measurements of the Li distributions revealed considerable deviations from the expected ballistic range profiles. This Li redistribution was simulated by a numerical computer calculation. The best fit between measurements and simulations was obtained by assuming that (i) Li redistributes immediately after its ballistic slowing-down, (ii) the Li mobility is enhanced in the radiation-damaged polymer region, the local diffusion enhancement being controlled by the target’s electronic damage, (iii) mobile Li is readily trapped at radiation-induced defects, their density being proportional to the target’s electronic damage, (iv) these traps are saturable ones, and (v) Li migration is not restricted to the ion track region, but proceeds also through the neighboring unirradiated bulk, though with slower speed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01594234
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  • 9
    Electronic Resource
    Electronic Resource
    Nanotomographic examinations of ion tracks in cellulose nitrate by ion energy loss spectrometry (1999)
    Springer
    Applied physics 68 (1999), S. 87-91 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 02.90.+p; 61.41.+e; 61.80.Jh; 82.30.Lp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050858
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  • 10
    Electronic Resource
    Electronic Resource
    Deformational, swelling, and potentiometric behavior of ionized gels of 2-hydroxyethyl methacrylate-methacrylic acid copolymers (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 2073-2082 
    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 deformational, swelling, and potentiometric behavior of ionized water-swollen gels of 2-hydroxyethyl methacrylate (HEMA)-methacrylic acid (MA) copolymers used in biomedical and separation applications was investigated. With increasing degrees of neutralization α, the swelling degree strongly increases and the modulus Gs decreases. For the copolymers with MA content ≥ 30 mole-%, the dependence of Gs on α passes through a minimum. Comparison of the results with the modified theory of rubber elasticity shows that the decrease in Gs at low concentrations of charges on the chain is controlled mainly by the degree of swelling. At higher α, both the finite extensibility of network chains, caused by a high degree of swelling, and electrostatic interactions contribute to Gs. The dependence of the interaction parameter χ on the volume fraction of polymer in the gel, v2, is independent of α and closely resembles the dependence obtained for other hydrophilic polymers.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070230717
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