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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 187 (1986), S. 383-400 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A series of ether-amide block copolymers was studied by means of differential scanning calorimetry, mechanical analysis, and transmission electron microscopy. All of these techniques indicated a two-phase structure. However, the degree of phase segregation was relatively low as measured by calorimetry, and in the same range as for conventional segmented linear polyurethanes. The existence of an important interphase can explain the appearance of plastic behaviour in hard domains at temperatures well below the polyamide melting points. The low ordering was confirmed by transmission electron microscopy. Only the ether-amide copolymer with a composition in the phase inversion range exhibited a spherulitic, well-defined polyamide structure.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 53-63 
    ISSN: 0142-2421
    Keywords: XPS ; carbon fibers ; composites ; polyimide ; vinyl ester ; polyphenylene sulfide ; epoxy ; adhesion ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: With the uses of composites expanding into areas from aerospace to recreation, different matrices are being investigated to tailor the composites to specific uses. The degree of adhesion between the fiber and matrix has been recognized to be a critical factor in determining the performance of fiber-reinforced composites. Indirect analysis of the matrix/fiber interface is possible using model compounds which represent functional groups present in the matrix system. Model compounds based on epoxy, polyimide, polyphenylene sulfide and vinyl ester matrices have been investigated to characterize the chemical reactions at the fiber/matrix interface. X-ray photoelectron spectroscopy has been used to characterize both the carbon-fiber surfaces and the reacted carbon-fiber surfaces. The model compounds for the polyimide and polyphenylene sulfide matrices have been found to show little chemical interaction with the fiber surfaces, while chemical reactions have been observed in the vinyl ester and epoxy resin model compound/fiber interfaces. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 16 (1995), S. 529-535 
    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: Determination of the compressive strength of a composite depends on many experimental parameters. One of them is the adhesive used to bond the tabs to the compression specimen. Experimental results show that the compressive strength has no significant change when different adhesives with different moduli are used. The compressive strength was also shown to be independent of adhesive thickness in a composite compression specimen. A finite element analysis was utilized in this study to investigate the effect of tab adhesive properties, i.e., the modulus and thickness of the adhesive layer, on the compressive strength. The stress distributions along the adhesive layer and stress concentrations at the tab tip of a composite compression specimen are presented. The analytical prediction coincides with the limited experimental data.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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