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  • 1
    Electronic Resource
    Electronic Resource
    Chemical shift measurements of substituent effects on out-of-plane magnetic shielding in benzene derivatives
    Amsterdam : Elsevier
    Journal of Magnetic Resonance (1969) 18 (1975), S. 6-11 
    Details
    ISSN: 0022-2364
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-2364(75)90218-8
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  • 2
    Electronic Resource
    Electronic Resource
    Chain end analysis of bisphenol A polysulfone and its relation to molecular weight (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 1309-1316 
    Details
    ISSN: 0887-624X
    Keywords: polysulfone ; step polymerization ; end-capping ; end group titration ; multiple end groups ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of amine-terminated polysulfone by step polymerization of the monomers bisphenol A and dichlorodiphenyl sulfone in the presence of end-capping reagent 4-aminophenol was investigated. A persistent problem with end-capping strategy as applied to step polymerization is the presence of end groups other than those introduced by the end-capping reagent. These unintended end groups, which can persist in the polymer product even when 100% of the end-capping reagent has reacted, are associated with a proportionate decrease in polymer chain length. This situation renders quantitative analysis of a single type of end group invalid as a method for molecular weight determination. The presence of unintended end groups does not appear to correlate with a particular set of reaction conditions; unintended end groups were found to occur in polymerizations conducted under strong base conditions (NaOH), under weak base conditions (K2CO3), and with a wide range of monomer feed ratios. A scheme for unambiguous quantification of chain ends and molecular weight for end-capped polysulfone is described. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1309-1316, 1998
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Chemical characterization of a high-performance organic fibre (1976)
    Springer
    Journal of materials science 11 (1976), S. 190-191 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00541090
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Chemical modification of polymer surfaces: a review (1994)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 5 (1994), S. 809-817 
    Details
    ISSN: 1042-7147
    Keywords: Polymer surface modification methods ; Surface functionalization ; Heterogeneous phase chemistry ; Polymer grafting ; Graft polymerization ; Plasma treatment and deposition ; Wet chemical oxidation ; Spectroscopic characterization ; Surface analysis ; 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
    Notes: The main approaches that have been taken to chemically modify polymer surfaces are introduced and reviewed. These are wet chemical oxidation, plasma treatment, classical organic chemistry, and attachment of polymer chains. The extent to which each of these approaches can produce the specific modifications desired is discussed, and any unwanted effects that commonly occur are cited. Finally, the need for using several methods of surface analysis in concert to obtain adequate surface characterization is described.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1994.220051207
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  • 5
    Electronic Resource
    Electronic Resource
    The origin of the deep brachial artery in American white and in American negro males (1931)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 50 (1931), S. 299-302 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1090500307
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  • 6
    Electronic Resource
    Electronic Resource
    A new approach to surface energy characterization for adhesive performance prediction (1981)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 3 (1981), S. 161-164 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A new approach to qualitatively predicting adhesion at a solid/solid interface is described. It is based on thermodynamic compatibility of the two adhering surfaces, but it overcomes the weaknesses of existing methods by using a full set of contact angle data and by assembling the data to reveal the main features of the set without loss of information. Adhesive performance data to support this approach are presented.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740030405
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of brittle thermoset specimens for surface characterization by contact angles (1983)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 5 (1983), S. 98-100 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A convenient and accurate method for surface analysis by contact angle studies is described. The specimen developed is particularly useful for brittle thermoset materials which must be prepared in a simple regular geometry for wetting force measurement by the Wilhelmy method. The procedure involves dip-coating wires to make smooth cylindrical specimens of cured thermoset resin for wettability (contact angle) analysis. The results from this type specimen were cross-checked with cast film specimen results to ensure that measured contact angles were material properties and were not influenced by geometry or presence of wire substrate. Results are presented for some modified and unmodified brittle thermoset resins showing changes in surface energetics.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740050304
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  • 8
    Electronic Resource
    Electronic Resource
    Some effects of surface-controlled reactions of Kevlar 29 on the interface in epoxy composites (1988)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 9 (1988), S. 184-191 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Surface energetics and adhesion to epoxy resin were investigated in the laboratory for Kevlar 29 fiber modified by a surface-controlled nitration reaction and by a nitration/reduction sequence. Results show that at the level of modification studied, the presence of functional groups on the fiber surface does not alter surface energy. On the other hand, interfacial adhesion is significantly increased for the modified as compared with untreated fiber.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750090304
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  • 9
    Electronic Resource
    Electronic Resource
    Relation of interfacial adhesion in Kevlar®/epoxy systems to surface characterization and composite performance (1983)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 4 (1983), S. 26-31 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A central problem in composite materials is the poorly understood relation between the nature of the surfaces at the fiber/matrix interface, the actual interfacial bond strength, and interface-sensitive composite properties, in this study on the Kevlar®/epoxy composite system, the interface was varied chemically by fiber sizings. The sized and unsized fiber surfaces and the cured matrix surface were characterized by contact angle measurements. The interfacial shear strength was directly measured by single-filament pull-out tests of sized and unsized fibers in epoxy matrix. The shear strengths of the composites made with sized and unsized fibers were measured. The results from surface analysis, interfacial shear tests, and composite shear tests were consitent. This suggests that surface-contact-angle analysis and single-filament pull-out tests may be helpful in screening strength of the composite.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750040105
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