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  • Polymer and Materials Science  (12)
  • 1985-1989  (12)
  • 1930-1934
  • 1
    Electronic Resource
    Electronic Resource
    Natural graphite filled polyolefins  -  electrical and electrochemical behavior (1988)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 164 (1988), S. 143-159 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Verbundwerkstoffe aus 80 Gew.-% Naturgraphit und 20 Gew.-% Polyolefin werden im Hinblick auf ihre Verwendung als positive Elektroden in Batterien charakterisiert. Der spezifische Widerstand ist 1 - 10 Ωcm und ist daher um einen Faktor von 104 bis 103, bezogen auf den reinen Graphit, größer. Der Anistropiefaktor erniedrigt sich auf 10. Hierfür ist eine Barriere aus einem Polymerfilm und/oder eine Bischicht aus Graphit-Oberflächengruppen zwischen den Graphitflocken, die durch Elektronen durchtunnelt wird, verantwortlich. Dies gilt auch für den ausgeprägten Feldeffekt.Die Gegenwart eines polymeren Binders macht sich ebenso durch einen Formiereffekt im Verlauf der ersten elektrochemischen Anionen-Intercalationszyklen bemerkbar. Die Langzeit-Zyklisierung einer Modellzelle ergibt einen starken Einfluß der mechanischen Eigenschaften des polyolefinischen Binders. Die erreichbare Zyklenzahl nimmt mit zunehmendem Elastizitätsmodul ab. Bei der Verwendung von Polyolefinen mit kleinem Elastizitätsmodul konnten 5000 einstündige Zyklen erhalten werden. Dies ist auf die verbesserte Verträglichkeit mit den periodischen Volumenänderungen im Verlauf der elektrochemischen Zyklisierung zurückzuführen.
    Notes: Composite materials with 80 wt.-% natural graphite and 20 wt.-% polyolefins have been characterized for their application as positive electrodes in batteries. With respect to graphite, resistivity is enhanced by a factor of 104 (ρ = 1-10 Ωcm), and the anisotropy factor is lowered to 10. A thin polymer film barrier and/or a thin bilayer of graphite surface groups between the graphite flakes, crossed by electron tunneling, is responsible for this and for a pronounced field effect of resistivity.The presence of a polymer binder is also indicated by a formation effect in the course of the first anion intercalation cycles performed by electrochemical experiments. Long term cycling of a model cell reveals a strong influence of the mechanical properties of the polyolefin binders. Those with high tensile strength lead to a much poorer cycle life than those with low tensile strength, where cycle numbers up to 5000 (one hour charge) have been obtained. The latter material has an improved compatibility to the periodical volume alterations in the course of electrochemical cycling.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1988.051640111
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  • 2
    Electronic Resource
    Electronic Resource
    Electroorganic Syntheses, Part I: Oxidations. Von S. Torii, VCH Verlagsgesellschaft, Weinheim - Deerfield Beach - Basel 1985. XI, 338 S.,zahlr. Abb. u. Tab., geb., DM 138,- (1986)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 58 (1986), S. 14-14 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330580105
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  • 3
    Electronic Resource
    Electronic Resource
    Solid state electrochemistry and its applications to sensors and electronic devices. By K. S. Goto. Elsevier Science Publishers, Amsterdam 1988. x, 454 pp., bound, US $ 119.50. - ISBN 0-444-42912-3 (1989)
    Weinheim : Wiley-Blackwell
    Advanced Materials 1 (1989), S. 207-207 
    Details
    ISSN: 0935-9648
    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/adma.19890010613
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  • 4
    Electronic Resource
    Electronic Resource
    Transport and related properties of paint films. I. Composition and structure (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 675-694 
    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: This is the first of a series of articles on ionic and molecular transport processes and related properties of paint films. The intention is to correlate adhesion and initiation of corrosion to these relevant physical and chemical properties. Chemical formulas and structure of three vinyl-three epoxy- and one polyurethane-paint system are given in this article. Each paint has been formulated to meet appropriate military specifications. Subsequent articles will deal with dynamic mechanical properties, small angle x-ray scattering measurements of porosity, and transport properties.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300217
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  • 5
    Electronic Resource
    Electronic Resource
    Transport and related properties of paint films. II. Dynamic mechanical properties and humidity effects (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 111-133 
    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 systematic four-stage investigation of eight unpigmented coating formulations, including three vinyl, two polyurethanes, and three epoxy systems was done to provide baseline structural information upon which an improved understanding and an optimization of protective coatings can be founded. First, the results from dynamic mechanical measurements are provided and discussed for the base polymer component in each coating system. Second, the effects of humidity on the dynamic mechanical properties of these base polymers were determined at room temperature. The extent of property degradation was monitored by calculating the Tg depression with increased humidity, assuming a temperature-humidity superposition. The extent of degradation, as monitored by the Tg, was found to correlate directly with the level of hydrogen bonding in these coatings. Third, the influence of typical coating additives (a TCP plasticizer and a rosin hardener) on the properties of two of the vinyl coating systems was investigated. In the final stage, the synergistic effects of absorbed moisture and these additives on the coatings properties were investigated at room temperature. Increases in the concentration of these additives was found to magnify the degradation effect of increased humidity. This magnified degradation has been assigned to increased water absorption with increases in the concentration of either of these additives.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300109
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of reagent residues and catalysts on formaldehyde release from DMDHEU-treated cottonPresented in part at the 187th National Meeting of the American Chemical Society, St. Louis, MO, 1984. (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 34 (1987), S. 549-558 
    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: Observations and conclusions drawn from a model N-methylol reactant system have been used to study formaldehyde release from cotton fabric treated with N,N′-dimethylol-4,5-dihydroxy-ethyleneurea (DMDHEU). Reagent residues produced by DMDHEU in the presence of sodium bisulfate or zinc nitrate were found to be more complex than those formed from the N-methylolpyrrolidone (NMP) reactant system, and the exact nature of some of the residues from DMDHEU could not be established. Zinc nitrate produces higher fixation of DMDHEU on cotton as compared to sodium bisulfate and also reduces formaldehyde release. As is the case with the NMP system, the lower amount of formaldehyde release with zinc nitrate catalyst is believed to be at least partially due to the formation of a complex between the N-methylol reactant, DMDHEU, and zinc nitrate. The C—OCell bonds in both finishes resist acid-catalyzed cleavage but cleavage of the N—C bonds in N-methylol groups (to release formadehyde) in the presence of acid is greater for the DMDHEU system than for the NMP system. Results with the DMDHEU and NMP systems are similar, but because of the complex nature of the products formed in the DMDHEU system it is very difficult to correlated formaldehyde release with specific chemical structures of residues or reactants.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070340210
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis, isolation, and characterization of N,N′-oxydimethylenebisamides (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 725-728 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270230
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  • 8
    Electronic Resource
    Electronic Resource
    Kriechverhalten des Stahls X 6 CrNi 18 11 bei vorhandenen Abweichungen von der idealen Gestalt (1986)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 17 (1986), S. 211-217 
    Details
    ISSN: 0933-5137
    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: Creep Behaviour of Steel X 6 XrNi 18 11 Bars with Deviations from the Ideal FormThe Creep behaviour of cylindrical bars of the austenitic stell X 6 CrNi 18 11 which have a diameter deviation is described. The creep behaviour of the material is determined for an ideal geometry. For the secondary and tertiary creep stage the influence of cylindricity deviations on steady state creep rate, creep strain and creep life is calculated by a closed form estimation and by an exact numerical solution. The computations are compared with the experimental results.
    Notes: Das Kriechverhalten von zylindrischen Stäben aus dem austenitischen Stahl X 6 CrNi 18 11, die eine Durchmesserabweichung aufweisen, wird beschrieben. Dazu wird das Werkstoffverhalten bei idealer Geometrie ermittelt. Für den sekundären und tertiären Kriechbereich wird der Einfluß von Zylindrizitätsfehlern auf sekundäre Kriechgeschwindigkeit, Deckungswerte und Lebesdauer sowohl mit einer geschlossenen Näherungsslösung als such numerisch berechnet. Die Rechenergebnisse werden mit experimentell ermittelten Werten verglichen.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19860170606
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  • 9
    Electronic Resource
    Electronic Resource
    A comparison of the Creep Behaviour of various austenitic steels under carburising conditions (1988)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 19 (1988), S. 104-111 
    Details
    ISSN: 0933-5137
    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: Vergleichende Untersuchungen zum Kriechverhalten verschiedener austenitischer Stähle unter aufkohlenden BedingungenEs werden Untersuchungen zum Kriechverhalten an drei hitzebeständigen Stählen in aufkohlender Atmosphäre beschrieben. Die Versuche erfolgten unter kontinuierlicher Aufkohlung sowie an einem voraufgekohlten Materialzustand. Die experimentellen Bedingungen basierten in der Hauptsache auf dem Prozeß der Äthylen-Gewinnung, jedoch können die Resultate im weiteren Sinn die Wechselwirkung zwischen Kriechverformung und Aufkohlung beschreiben.
    Notes: Investigations are reported on the creep and creep fracture behaviour of three heat resistant steels under carburising conditions. The material has been tested either under continuous carburisation or in a precarburised state. The chosen testing conditions are primarily related to ethylene production but the results enable the description in a more general way of carburisation-creep interaction.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19880190305
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  • 10
    Electronic Resource
    Electronic Resource
    Specificity of initiating systems based on allyl derivatives of group VI-metals in the formation of graft and block copolymers (1989)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 15 (1989), S. 39-47 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyvinylpyridines activated by tris(π-allyl)chromium and by tetrakis (σ-allyl)molybdenum or tetrakis(σ-allyl)tungsten, complexed with tetrahydrofuran, were used for grafting with acrylonitrile. The products obtained, differing in the degree of branching, were characterized by various physical methods. Block copolymers of the types butadiene-acrylonitrile and styrene-oligobutadiene-acrylonitrile were synthesized by the use of tris(π-butadienyl)chromium as the initial active agent. Some molecular parameters of these block copolymers were established.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1989.020151989105
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