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  • Articles  (2)
  • semicrystalline polymers  (1)
  • thermal conductivity  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The phases of polymers as determined by NMR (1997)
    Springer
    Journal of thermal analysis and calorimetry 49 (1997), S. 521-524 
    Details
    ISSN: 1572-8943
    Keywords: dynamics ; morphology ; semicrystalline polymers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Nuclear magnetic resonance (NMR) spectroscopy has been used to study the morphology and dynamics in semicrystalline polymers. Dynamics may be observed through NMR relaxation rates that are sensitive to motions in the 1–108 Hz range, or through modulation of anisotropic magnetic interactions, such as the chemical shift and dipole-dipole interactions. Morphological structure may be inferred through NMR measurements of polymer dynamics or investigated directly through studies of the magnetic interactions. Here, we discuss the study of morphological structure in semicrystalline polymers using NMR, and review results on poly(ethylene terephthalate) that address the question of the number of phases in this semicrystalline polymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01987479
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal conductivity measurements of pacific illite sediment (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 755-764 
    Details
    ISSN: 1572-9567
    Keywords: illite ; line-source probe ; sediment ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Results are reported for effective thermal conductivity measurements performed in situ and in core samples of illite marine sediment. The measurements were obtained during a recent oceanographic expedition to a study site in the north central region of the Pacific Ocean. This study was undertaken in support of the U.S. Subseabed Disposal Project, the purpose of which is to investigate the scientific feasibility of using the fine-grained sediments of the sea floor as a repository for high-level nuclear waste. In situ measurements were made and 1.5-m-long hydrostatic piston cores were taken, under remote control, from a platform that was lowered to the sea floor, 5844 m below sea level. The in situ measurement of thermal conductivity was made at a nominal depth of 80 cm below the sediment surface using a specially developed, line-source, needle probe. Thermal conductivity measurements in three piston cores and one box core (obtained several kilometers from the study site) were made on shipboard using a miniature needle probe. The in situ thermal conductivity was approximately 0.91 W · m−1 · K−1. Values determined from the cores were within the range 0.81 to 0.89 W · m−1 · K−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503833
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