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  • 1
    Electronic Resource
    Electronic Resource
    Schwächung des Holzes von Kühltürmen, mögliche Ursachen (1962)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 13 (1962), S. 541-543 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Deterioration of timber in cooling towers. Possible causesTimber in cooling towers is always exposed to exacting working conditions and shows many signs of deterioration. In order to clarify two specific cases of deterioration, the timber of cooling towers (redwood and fir) has been subjected to mechanical tests for loss of mechanical strength whilst the cooling water and circulating water have been analyzed. It was found that alkaline water with iron content causes a marked loss of mechanical strength and that the impregnation of the wood with tar oils has a very great protective effect as it inhibits the corrosion caused by iron nails.
    Notes: Holz, das durchgängig in Kühltürmen harten Betriebsbedingungen ausgesetzt ist, zeigt vielartige Schäden. Zur Aufklärung zweier Schadensfälle wurde das Holz von Kühltürmen (Redwood u. Fichte) mechanisch auf Wertminderung (Steifigkeits-Einbuße) sowie das Kühlwasser und das Umlaufwasser analytisch untersucht. Festgestellt wurde, daß alkalische, eisenhaltige Wässer zu starkem Steifigkeitsverlust (Schwächung) führen und, daß Imprägnieren des Holzes mit Teerölen in hohem Maße zerstörungsschü;tzend wirkt, da dies auf die Korrosion eiserner Nägel inhibierend wirkt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19620130905
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  • 2
    Electronic Resource
    Electronic Resource
    Proton magnetic resonance of poly(hexamethyene adipamide)Supported in part by the U. S. Atomic Energy Commission, Conract No. AT(30-1)-1858. (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 42 (1960), S. 271-273 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204213928
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  • 3
    Electronic Resource
    Electronic Resource
    Proton magnetic resonance of some polyamidesSupported in part by the United States Atomic Energy Commission under Contract No. AT(30-1) 1858. (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 45 (1960), S. 367-377 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Proton magnetic resonance of a number of polyamides has been investigated in the 80-410°K. range. Line width and second moment vs. temperature plots for dry specimens of poly(hexamethylene adipamide) and poly(hexamethylene sebacamide) are found to exhibit two transition regions. Saturation with H2O or D2O lowers the temperature of the principal line-narrowing process for the above two polymers as well as for poly(decamethylene sebacamide) and shifts part of the second-moment transition which occurs above room temperature to lower temperatures; in both cases H2O has a more pronounced effect than D2O. Exchange of the protons, presumably on the amide groups, for deuterium leads to small decreases in line width and second moment at temperature in and below the main transition. N-methylation of poly(decamethylene sebacamide) up to 58% causes marked shifts of the principal line-narrowing process and NMR second moment transition to lower temperatures. The NMR data are found to be in qualitative agreement with dynamic mechanical measurements on similar samples.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204514607
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  • 4
    Electronic Resource
    Electronic Resource
    Stripping rates of vinyl chloride from PVC resin (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 3775-3779 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.170171132
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of pressure on melting temperature and other associated thermodynamic functions of polyethylene (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 21 (1977), S. 2621-2629 
    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 melting temperature of polyethylene was determined at pressures up to 30 kbar. Using these results and the calculated values of the volume change on melting in the Clausius-Clapeyron equation, the enthalpy and entropy of fusion as a function of pressure were also determined.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1977.070211005
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  • 6
    Electronic Resource
    Electronic Resource
    Aromatic ionomer membranes. I. Physical and mechanical properties (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 2821-2836 
    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 physical properties of a new class of ionomers comprising a semirigid polyphenylene ether backbone were investigated. The material was studied principally in the form of films of ca. 150 μm micrometers in thickness. The study focused on material of 600 equivalent weight. Torsion pendulum results showed a significant increase in the glass transition temperature of the ionomer relative to that of its ester precursor but gave no evidence of ionic clustering. Stress-strain studies performed both in water and in 20% KOH solution at 80°C indicated that the mechanical properties of the material remain stable under these conditions. Differential scanning calorimetry was used to investigate both the high temperature behavior and the water uptake of the ionomer films. The behavior of this ionomer at high temperature and in an alkaline solution is of particular interest in view of the possible use of these films as separators in an alkaline electrolysis cell.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300709
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  • 7
    Electronic Resource
    Electronic Resource
    Aromatic ionomer membranes: II. Evaluation as separators for advanced alkaline water electrolyzers (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 2837-2846 
    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 sorption and transport properties of newly developed aromatic carboxylate polymers have been investigated in the context of their application as membrane separators for water electrolyzers. Conductance measurements of aromatic carboxylates of various equivalent weights have been performed as a function of current density, temperature, and electrolyte environment. Results have been compared with those for Nafion 117. The sorption results in dilute and concentrated solution show large water and electrolyte uptake for the aromatic carboxylate films. Furthermore, relatively large sodium ion self-diffusion coefficients have been found in both dilute and concentrated solution environments. The results of these measurements are characteristic of microporous films. The de conductance behavior of the aromatic carboxylate ionomers is quite different from that found for nonporous 1150 equivalent weight Nafion membranes. This difference is caused primarily by the microporous structure of the aromatic carboxylates, which results in large membrane specific conductances.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300710
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  • 8
    Electronic Resource
    Electronic Resource
    AC breakdown of melt-crystallized isotactic polypropylene (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 35 (1988), S. 1459-1472 
    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 polymer morphology on the dielectric breakdown of isotactic polypropylene was investigated under the influence of a ramped ac voltage. Samples were prepared by melt-pressing polypropylene beads into plaques and subsequently quenching or isothermally cyrstallizing these plaques. Some of the quenched samples were annealed at different temperatures to induce further crystallinity. The plaques were then characterized by wide-angle X-ray diffraction, density measurements, and differential scanning calorimetry. The 60 Hz, ac breakdown voltages of the samples were determined at 7°C, 23°C, and 45°C in a specially designed test cell. There was a lack of any significant effect on the ac breakdown strength of isotactic polypropylene of either the overall crystallinity or the crystallite thickness. This result can be understood in light of previous studies relating the electrical breakdown of polymers to morphology. It is postulated that the degree of crystallinity would influence the breakdown characteristics only when the amorphous regions constitute a small fraction of the total volume, that is, at very high crystallinity values - values beyond the range of the present study.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1988.070350605
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  • 9
    Electronic Resource
    Electronic Resource
    Competitive adsorption of water-soluble polymers on attapulgite clay (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 1293-1299 
    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 individual, competitive, and displacement adsorption of polyvinyl alcohol (PVOH), hydroxyethyl cellulose (HEC), and hydroxypropylmethyl cellulose (HPMC) in aqueous solution onto an attapulgite clay has been systematically studied. For the individual adsorption experiments, the amount of polymer adsorbed at equilibrium decreased in the order PVOH, HEC, HPMC. In the competitive adsorption experiments, the adsorption level of each polymer is diminished by the presence of a competing polymeric species. Binary mixtures of a cellulosic polymer (HEC or HPMC) with PVOH result in a substantial reduction in the amount of cellulosic polymer adsorbed. In the displacement adsorption studies, the sequential addition of HEC or HPMC is not able to displace previously adsorbed PVOH molecules to any appreciable extent. However, the addition of PVOH to previously equilibrated HEC/clay or HPMC/clay suspensions results in a large amount of the adsorbed cellulosic polymer being displaced by PVOH, especially under conditions of high surface coverage. These results indicate that PVOH is preferentially adsorbed on the clay surface and the strength of attachment to the surface is greater for PVOH than for either cellulosic polymer.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070430710
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  • 10
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance study of polyethylene crystals (1960)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 42 (1960), S. 248-250 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1960.020420124
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