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  • Polymer and Materials Science  (407)
  • Life and Medical Sciences  (60)
  • Analytical Chemistry and Spectroscopy
  • SPACE SCIENCES
  • Wiley-Blackwell  (467)
  • 1955-1959  (467)
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Keywords
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  • Wiley-Blackwell  (467)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Physical properties of high molecular weight acetal resins (1959)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 1 (1959), S. 179-184 
    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: Information is presented on those physical properties where measurement is greatly facilitated by thermal stability greater than previously known in polyoxymethylenes, and properties of a mechanical nature characteristic of high molecular weight polymeric materials. The high molecular weight polyoxymethylenes studied possess the characteristic properties of a semicrystalline material in the high molecular weight range. The melting point, stiffness, and tensile strength of these materials substantially exceed those for linear polyethylene, which suggests that the effective chain interactions are enhanced by ease of close packing of the chains. High density and high crystallinity are in accord with this picture.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1959.070010208
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  • 2
    Electronic Resource
    Electronic Resource
    Some properties of undrawn nylon 6 yarn (1955)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 17 (1955), S. 311-314 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1955.120178416
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  • 3
    Electronic Resource
    Electronic Resource
    Degradation of long-chain molecules by ultrasonic waves. Part VI. Effect of pressure (1956)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 21 (1956), S. 535-545 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Ultrasonic degradation of polystyrene in benzene solutions has been studied as a function of pressure exerted on the solutions. Appreciable differences in the rate and extent of degradation have been found if the pressure was exerted via a mercury column, the solutions being saturated with gas at one atmosphere or if the pressure of nitrogen over the solutions was increased, the solution being saturated with nitrogen at each respective pressure.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1956.120219917
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  • 4
    Electronic Resource
    Electronic Resource
    Über adsorptionseffekte bei der bestimmung von spezifischen viskositäten (1956)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 18 (1956), S. 383-396 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The adsorption of polymer molecules influences viscosity measurements in two ways. It can creduce the diameter of the capillary and also the concentration. The thickness of the adsorption layer of polystyrene could be determined by measurements in capillaries of different diameter as well as by measuring the diameter with a suitable standard liquid. The adsorbed quantity per unit area was determined by adsorption on glass wool. It is possible to calculate from the results of Streeter and Boyer the effective thickness of the layer in their experiments. This value agrees with the thickness directly measured by Öhrn and by us. As the influence of the adsorptioneffects depends on the employed technique, a physical interpretation of the ηsp/c versus c-curves in different solutions is only possible, if this technique is known in detail.
    Notes: Eine Reihe von Arbeiten aus den letzten Jahren, die über ein anomales Verhalten der Viskosität von Lösungen sehr niedriger Konzentration berirchten, gab Veranlassung, die Adsorptionseffekte bei Viskositätsmessungen zu betrachten, nämlich die Kapillarverengung und die Konzentrationserniedrigung. Durch Messung in verschieden weiten Kapillaren, sowei durch Bestimmung des Kapillarradius mit Hilfe einer Eichflüssigkeit konnte die Dicke der Adsorptionsschichte ermittelt werden. Außerdem wurde durch Messung der Adsorption an Glaswolle die pro Flächenienheint adsorbierte Polystyrolmenge bestimmt. Anhand einer Beziehung zweischen der Viskositätsänderung und den beiden Adsorptionseffekten haben wir aus dem Verlauf der von Boyez und Streeter(1) gemessenen spezifischen Viskosität unter Verwendung unseres Wertes der Flächenbelegung bzw. der Dichte der Adsorptionsschicht die effektive Schichtdicke bei diesen Viskositätsmessungen berechnet. Die so gefundene Schichtdicke stimmt recht gut mit den von Öhrn und uns driekt gemessenen Schichtdicken überein.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1956.020180133
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of carbon black on thermal antioxidants for polyethylene (1959)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 1 (1959), S. 37-42 
    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: About 3% by weight of carbon black adequately protects polyethylene against photo-oxidation and, under accelerated test conditions, slightly inhibits thermal oxidation. As a rule small amounts of organic antioxidants are also added to the polymer for optimum protection. Now many of the common phenolic and amine additives have been found to function much less effectively in polyethylene containing carbon black than in clear polymer. Loss of effectiveness is attributed to adsorption and/or decomposition of the antioxidant by both basic and acidic carbon black.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1959.070010107
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  • 6
    Electronic Resource
    Electronic Resource
    Report on molecular-weight measurements of standard polystyrene samples. II. International union of pure and applied chemistry (1955)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 17 (1955), S. 1-20 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: As an extension of our original program, one more polystyrene fraction was investigated in numerous laboratories by means of viscosimetry, osmometry, light scattering, and ultracentrifuge. The various results are compared and critically discussed. Possible explanations and suggestions for improvement are offered in those cases in which considerable discrepancies occur. The viscosity results show satisfactory agreement. The discrepancies among osmotic results are believed to be due largely to unsatisfactory performance of the so-called semipermeable membranes. Discrepancies among light-scattering results can mostly be traced back to the unsatisfactory state of the various calibration techniques. The results obtained with the ultracentrifuge agree quite satisfactorily.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1955.120178301
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  • 7
    Electronic Resource
    Electronic Resource
    Structural analysis of novolacs (1955)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 17 (1955), S. 411-415 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The structure of certain novolacs, prepared by polycondensation of formaldehyde with phenol, p-cresol, and m-cresol respectively, was investigated. The novolacs were transformed into saturated hydrocarbons, thus expelling the oxygen, by a relatively mild high pressure hydrogenation (300°C., 250 atm.) using 100% by weight of a nickelcopper on kieselguhr catalyst. It can be expected that this treatment does not alter the structural frame of the molecules. From ultimate analysis and physical constants of the hydrocarbons, conclusions were made as to the structure of the novolacs. They are linear thermoplasts; no “extra” rings are present.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1955.120178510
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  • 8
    Electronic Resource
    Electronic Resource
    Oligamide aus ω-Aminoundecansäure (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 36 (1959), S. 539-541 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203613054
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  • 9
    Electronic Resource
    Electronic Resource
    Linear phenol-formaldehyde polymers: Synthesis of ortho-para linked polymers (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 38 (1959), S. 513-520 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Linear ortho-para linked phenol-formaldehyde polymers were prepared by the addition of tetrahydrofuran solutions of o-chlorophenol-formaldehyde polymers to liquid ammonia containing sodium. The resulting phenol-formaldehyde polymers were crosslinked much more slowly by reaction with hexamethylenetetramine than were the isomeric ortho-ortho linked phenol-formaldehyde polymers. Infrared and acetylation studies were consistent with proposed structure.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203813421
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  • 10
    Electronic Resource
    Electronic Resource
    Degradation of long chain molecules by ultrasonic waves. VIII. Rate constants and the cavitation process (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 37 (1959), S. 485-497 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Solvent velocities at a constant distance from the center of a collapsing cavity have been calculated for a liquid exposed to ultrasonic waves. These velocities can be expressed as a function of time by a sine function. This permits the calculation of degradation rate constants as a function of polymer chain length, intensity, and frequency of the ultrasonic waves and also as a function of the hydrostatic pressure exerted on the reaction system. In all cases, the calculated rate constants show relationships similar to those found for experimental rate constants. In some cases (e.g., initial chain length) quite a good quantitative agreement is obtained.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203713218
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