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  • Wiley-Blackwell  (566)
  • American Meteorological Society
  • 1950-1954  (645)
  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 8 (1952), S. 345-346 
    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.
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 9 (1952), S. 579-581 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 7 (1951), S. 457-461 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In this paper a simple method is described for determining the moment of disappearance of soap micelles during the emulsion polymerization of styrene by measuring the electrolytic conductivity during the polymerization.
    Additional Material: 3 Ill.
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  • 4
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In the dextrose-free recipe at 41°F. for the copolymerization of butadiene and styrene, using 6 × 10-4 mole of initiator per one hundred grams of monomers, methyl oleate peroxide (MOP) and methyl linoleate peroxide (MLP) gave higher polymerization rates and conversions than cumene hydroperoxide (CHP), and they gave as high rates of conversion as p-menthane hydroperoxide (PMHP). In the peroxide-dextrose recipe at 122°F., at both low and high dextrose levels, only about one-half as much MOP (1.5 × 10-4 mole) as CHP or PMHP was employed on a molar basis to achieve the same conversion and polymerization rate. In the low dextrose-redox recipe at 41°F., using 6 × 10-4 mole of initiator per one hundred grams of monomers, MLP gave slightly higher conversions than CHP or PMHP, but in the amine recipe at 41°F., MLP gave lower conversions.
    Additional Material: 2 Tab.
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  • 5
    Electronic Resource
    Electronic Resource
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 41 (1953), S. 145-152 
    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 3 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 442-446 
    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: Artifical Resins and Body TissuesThe article opens with a brief description of the irritational effects (corrosion, electrolysis, etc.), of metals entering and remaining in the human body, either, as a result of surgical treatment or accidently. The cause and effect of the irritation set up by foreign bodies is then discussed.It has been found that, in actual practice, there are artifical resins which have no effect upon human tissue. They must be chemically stable, cause no irritation of a mechanical nature and must have the physical properties of an insulator.When artifical resins are required to function statically in the human body, certain peculiar difficulties arise, which are due to the physical and chemical properties of the resin. These difficulties are described in detail.It is fact that artifical resin manufactures have not yet been able to produce a resin of a “universal” nature, which can be used as a statically functioning substitute for bones and bony structures.At the moment it would appear possible for manufacturers to produces an artifical resin which has no irritational effects and yet has no irritational mechanical strength.
    Notes: Nachdem die Metalle, welche operativ oder aus Zufall in den Körper gelangen und dort verbleiben, in der Möglichkeit ihrer Gewebereizwirkung (Korrosion, Elektrolyse) kurz behandelt wurden, wird auf die Ursache und die Wirkung der Fremdkörperreize eingegangen.Es hat sich in der Praxis bestätigt, daß es Kunstharze gibt, die keine Gewebereize ausüben. Sie müssen physikalisch einen Isolator darstellen, chemisch stabil und mechanisch reizlos sein.Bei der Übernahme statischer Funktionen innerhalb des Körpers treten bei Kunstharzen durch die ihnen eigentümlichen Eigenschaften Schwierigkeiten auf, auf welche näher eingegangen wird.Es zeigt sich, daß die relative junge Kunstharzindustrie noch kein Universalmaterial schaffen konnte, welches in allen Fällen geeignet ist, statisch funktionstüchtig als Knochenersatz verwendet zu werden.Für die Zukunft erscheint es glaubhaft, daß Kunstharze durch die Industrie erstellt werden können, die sowohl reizlos sind, wie auch in ihrer Festigkeit ausreichend sein dürften.
    Additional Material: 2 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 6 (1951), S. 45-58 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The results of emulsion polymerizations in which twenty-eight different organic hydroperoxides were used as oxidizing agents in a standard redox recipe at 5°C. have been presented. Each hydroperoxide was tested at several different concentration levels. The hydroperoxides of chlorodiisopropylbenzene, di-t-butylisopropylbenzene, cyclohexylbenzene, 1,2,3,4,4a,9,10,10a-octahydrophenanthrene, and t-butylisopropylbenzene were found to be the most effective of the compounds tested. Oxidation mixtures, concentrates of oxidation mixtures, and purified samples of hydroperoxides served as sources of hydroperoxide for the polymerization experiments reported. Similar results were obtained with oxidation mixtures and concentrates, but purification of the hydroperoxide usually resulted in improved polymerization rates. The amount of hydroperoxide which gives the optimum results in a given polymerization recipe varies for structurally different hydroperoxides and appears to be related to the molecular weight.
    Additional Material: 4 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 7 (1951), S. 657-657 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
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  • 9
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 10 (1953), S. 543-550 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Measurements on flow birefringence of solutions of polyvinyl chloride in cyclohexanone revealed that the angle of orientation increases with decreasing concentration of the solution. That this surprising effect was not due to constructional or experimental errors was demonstrated by results obtained with polystyrene, which were in agreement with literature data.
    Additional Material: 8 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 12 (1954), S. 469-480 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In a radical polymerization in which initiation is solely by the addition of an initiator fragment to a monomer molecule, there must be in the polymer one combined initiator fragment for each kinetic chain; analysis of the polymer therefore can lead to a determination of the kinetic chain length. The rate of initiation is equal to the over-all rate of polymerization divided by the kinetic chain length, and so it can be calculated. This new method for calculating rates of initiation is not subject to the uncertainties associated with older methods. Analysis for initiator fragments can be performed accurately if the initiator is labeled with a radioactive isotope; in the work described here C14-α,α′-azo-bis-isobutyronitrile was used. An essential requirement is that the polymer molecules of low molecular weight must not be lost during precipitation of the polymer. Tests are described showing that loss of low molecular weight materials is negligible in most cases and that even when the average molecular weight of the polymer is low and there is an appreciable loss a correction can be made. A correction can also be made for the consumption of initiator during the reaction. The results presented in this paper refer to the copolymerization of butyl acrylate and styrene in benzene solution at 60°. It is shown that for a given monomer mixture the rate of initiation is proportional to the concentration of initiator, and that for each initiator molecule decomposed approximately one reaction chain is started.
    Additional Material: 3 Ill.
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