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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of polymer films by diffuse reflectance FTIR spectroscopy: Characterization of terminal carboxyl functionalities (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 30 (1992), S. 1305-1310 
    Details
    ISSN: 0887-6266
    Keywords: infrared spectra of PET film from diffuse reflectance ; poly(ethylene terephthalate), polymerization rate study by diffuse reflectance FTIR of ; carboxyl terminal functionalities in polymerizing PET films from FTIR study ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Fourier transform infrared (FTIR) spectroscopy in the diffuse reflectance mode was used to study polyethylene terephthalate (PET) films. The polymer film (12 μm, molecular weight M1 = 18,000) was placed on a finely powdered KBr matrix, used as a reference. Infrared spectra exhibited a new band at 1684 cm-1, not usually reported in the literature. This band is assigned to the C—O stretching vibration of a terminal acidic function in the presence of internal hydrogen bonds. In the carbonyl region, artifacts created by specular reflection are also discussed. The assignment of the band at 1684 cm-1 is confirmed by transmission measurements on the overtone of carbonyl group (3335 cm-1), using polymer films with thicknesses greater than 200 μm and by comparison with polymer of different molecular weight. These acidic functions can be used to monitor the rate of polymerization. It is therefore possible to obtain information on the polymerization rate of PET films, using diffuse reflectance and transmission analysis, directly on the solid. © 1992 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1992.090301201
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  • 2
    Electronic Resource
    Electronic Resource
    Water interactions in Al/PET (1990)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 15 (1990), S. 609-613 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Two cases of water interaction with virgin PET and with metallized (Al) PET were studied using thermal desorption spectroscopy (TDS) and dynamic secondary ion mass spectrometry (SIMS), respectively. On the one hand, the TDS approach tends to show that the water is weakly bound to the polyester (∼ 10 kcal mol-1); on the other hand, the SIMS study performed on metallized PET shows an enhancement of the water concentration around the interface. These results are discussed in order to elucidate the presence of such moisture and its influence on the metal/polymer adhesion and corrosion.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740151007
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  • 3
    Electronic Resource
    Electronic Resource
    Study of the Al/PET interface in relation with adhesion (1988)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 12 (1988), S. 486-490 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Thermally evaporated aluminium thin layers have been deposited on two different industrial Polyester (PET) films. The Peel test shows that adhesion between Al films and PET depends on the heat setting conditions of the PET foils.In order to explain the observed differences in adhesion, ISS analyses were performed on the two surfaces obtained after peeling aluminium from the PET substrates. The Al/PET laminates were also studies by SIMS, RBS and TEM.ISS results show that the failure mechanisms differ for the two samples investigated. From the SIMS depth profiles, a lower sputtering rate is found for the sample presenting a lower adhesion, and RBS spectra show that the Al/PET interface is steeper for this sample. Also, marked differences in the Al grain sizes are observed by TEM: larger grains without preferred orientation are found on Al layers of poor adhesion.These results are discussed in view of elucidating the influence of the substrate properties on the metal/polymer adhesion.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740120903
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  • 4
    Electronic Resource
    Electronic Resource
    XPS-Untersuchungen von im H2-Plasma erzeugten Polyenen in PVC (1990)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 41 (1990), S. 553-554 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1990.010411011
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