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  • 1
    Electronic Resource
    Electronic Resource
    A NEW REARRANGEMENT: CATALYTIC ISOMERIZATION OF m-DIOXANES TO β-ALKOXY ALDEHYDES (1960)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 82 (1960), S. 6419-6420 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01509a062
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  • 2
    Electronic Resource
    Electronic Resource
    A New Rearrangement. Catalytic Isomerization of m-Dioxanes to β-Alkoxy Aldehydes. II. Scope and Limitations1 (1962)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 84 (1962), S. 3307-3319 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00876a018
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  • 3
    Electronic Resource
    Electronic Resource
    Emulsion polymerization of ethylene. IV. Effect of recipe and polymerization conditions on polymer properties (1966)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 10 (1966), S. 1845-1862 
    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: Some Physical, chemical, and solution properties of polyethylene prepared by emulsion polymerization are described and compared with those of conventional high-pressure polymer. The emulsion polymers contain an unusually large amount of low molecular weight material for the solution viscosities they exhibit. It is this low molecular weight material that contributes to the characteristic low elongation of the emulsion polymer, as well as to its wide distribution of molecular weights. The effect of changes in recipe and in conditions of polymerization on these properties is discussed. It is shown that some of the emulsifier present during polymerization becomes part of the polymer chain.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1966.070101205
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  • 4
    Electronic Resource
    Electronic Resource
    Polyblends based on vinyl chloride/propylene copolymer (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 1733-1746 
    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: Blends of vinyl chloride/propylene copolymer (VCM-P) with aromatic polycarbonate (PC) and with ABS terpolymer were studied. Particular emphasis was on characteristics of deflection temperature under load (DTUL), simply referred to as heat deflection temperature (HDT). In a binary system which contained PC and VCM-P, the HDT-composition plot exhibited an S-shaped curve, suggesting incompatibility. In contrast, a straight-line correlation, indicating compatibility, was found for VCM-P/ABS blends. These observations are consistent with dynamic measurements by viscoelastometer (Vibron Model DDV-II). Compatibility of the VCM-P/PC system was improved through incorporation of ABS copolymer, as indicated by the broadening of tan δ peak. Electron photomicrographs revealed that, in a 50% VCM-P binary blend, polycarbonate existed in a string-like morphology which differed from the compatible ABS system where the ABS copolymer was dispersed in a form of discrete particles.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070230614
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  • 5
    Electronic Resource
    Electronic Resource
    Emulsion polymerization of ethylene. II. Effect of recipe on particle size and distribution (1966)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 10 (1966), S. 1214-1214 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1966.070100814
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  • 6
    Electronic Resource
    Electronic Resource
    Emulsion polymerization of ethylene. III. Factors affecting the stability of polyethylene latexesProd. No. 1279 (1966)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 10 (1966), S. 81-96 
    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: A semiquantitative method for assessing the amount of visible solid matter in polyethylene latexes is described. As judged by this method and by the presence of particles larger than 50 μ, the stability of the latexes was related to (1) the type and concentration of post-emulsifier added to the latex, (2) the average size of the polymer particles, and (3) the concentration of solids. Generally, the appearance was better when the latexes had a low (30%) concentration of solids, a large (800 A.) average particle diameter, and enough post-emulsifier to cover most of the polymer surface. Specific samples, however, having a high (36%) concentration of solids and a small (300 A.) average particle diameter also showed good storage stability. According to tests on selected latexes, good resistance to coagulation by mechanical shear was obtained only if the surface of the polymer was completely covered with emulsifier. When polyethoxylated alkylphenols were used as post-emulsifiers, an inverse relation appeared to exist between latex stability and average number of ethylene oxide units per emulsifier molecule. Moreover, the addition of each ethylene oxide group increased the apparent area of the emulsifier molecule by about 4 A.2
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1966.070100106
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  • 7
    Electronic Resource
    Electronic Resource
    Critical surface tension of blends of thermosetting fluorochemical methacrylate polymers with thermosetting hydrocarbon acrylate polymers (1975)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 19 (1975), S. 2235-2242 
    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: Critical surface tensions (γc) for blends of thermosetting fluorochemical methacrylates and thermosetting acrylate polymers are measured in their cured thermoset condition. Values of γc depend on (1) the nature of the fluorochemical side chain and (2) the ratio of fluorochemical containing polymer to hydrocarbon polymer. The minimum value for γc is found to occur at a fluorocarbon to hydrocarbon polymer ratio of 0.10 to 0.001. At higher and lower ratios (〉0.1 and 〈0.001), the value for γc increased. Thus, certain blends of fluorochemical methacrylate copolymer with hydrocarbon acrylate copolymer give lower γc than either the hydrocarbon acrylate or the fluorochemical methacrylate copolymer.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1975.070190815
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  • 8
    Electronic Resource
    Electronic Resource
    Emulsion polymerization of ethylene. I. Polymerization formulas and conditions (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 1797-1805 
    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: Formulas and operating conditions for the emulsion polymerization of ethylene are described. Stable latex products were obtained with a variety of anionic and nonionic emulsifiers, but for the majority of the work fatty acids or polyethoxylated alkyl phenols were used. Potassium persulfate was a satisfactory initiator at concentrations of 0.05-0.50 part per 100 parts of aqueous medium. Substitution of up to 15% of the water with tert-butyl alcohol increased the latex particle size and the molecular weight of the polymer. Pressures of 3000-5000 psig and temperatures in the range of 80-100°C. provided practical polymerization rates and stable latex products that could be concentrated by evaporation to 40-50% solids. The concentrated products were fluid and stable during storage for one year or more. Polymer isolated from the latexes exhibited a tensile strength of 1100-1400 psi, an elongation of 30-50%, and a Shore D hardness of 40-45.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090515
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  • 9
    Electronic Resource
    Electronic Resource
    Emulsion polymerization of ethylene. II. Effect of recipe on particle size and distribution (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 1807-1822 
    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: Particle diameters were measured in electron photomicrographs of polyethylene latexes prepared with a potassium soap, a polyethyoxylated p-alkyl phenol, or a sodium alkyl sulfate. The volume-surface average diameters calculated from these values compare well with those obtained independently by soap adsorption. Plots of the diameters on log probability paper indicate that the diameters follow a log-normal distribution. The width of the distributions is given, and its effect on the difference between the number-average and volume-surface average diameters is discussed. A study of the effect of the recipe shows that the diameter of the average particle produced in the emulsion polymerization of ethylene decreases as the amount of emulsifier is increased, but the addition of tert-butyl alcohol increases particle diameter. Particle diameter is not affected by the initiator within the concentration range normally used. During the course of polymerization, the number of particles slowly increases in the presence of tert-butyl alcohol, but in its absence the number of particles decreases. In the absence of tert-butyl alcohol, the number of particles increases as the 1.1 power of the emulsifier concentration.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090516
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  • 10
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    A NEW REARRANGEMENT: CATALYTIC ISOMERIZATION OF m-DIOXANES TO β-ALKOXY ALDEHYDES (1960)
    American Chemical Society
    Details
    Publication Date: 1960-12-01
    Print ISSN: 0002-7863
    Electronic ISSN: 1520-5126
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society
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