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  • 1
    Electronic Resource
    Electronic Resource
    Structure of polyethylene solid solutions from vibrational spectroscopy and thermal analysis (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 18 (1980), S. 1421-1431 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Solid solutions of two low-molecular-weight polyethylene fractions, formed by rapid quenching from the melt, were studied by differential scanning calorimetry, low-frequency Raman spectroscopy, and Fourier-transform infrared spectroscopy. Two kinds of defects exist in these solid solutions; namely, a disruption of chain extension and the presence of monoclinic packing. The distribution of fully extended chain-segment lengths and the intensity of the 717 cm-1 infrared band, characteristic of the monoclinic phase, are found to be composition dependent. Our spectroscopic studies of the solid solutions support the model first proposed by Ott and Slagle.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.180180620
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  • 2
    Electronic Resource
    Electronic Resource
    Longitudinal acoustic mode in linear aliphatic polyesters (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 18 (1980), S. 2287-2294 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The longitudinal acoustic mode has been observed in a series of linear aliphatic polyesters. In some cases, the vibrational frequencies observed do not strictly obey the expected inverse chain-length relationship. Both the periodicity measured in small-angle x-ray diffraction and the chain length deduced from Raman spectroscopy are highly dependent on thermal history.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.180181113
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  • 3
    Electronic Resource
    Electronic Resource
    Spectroscopic study of rigid-rod polymers. II. Protonation effect (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 20 (1982), S. 509-521 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The protonation of a heterocyclic rigid-rod polymer poly(p-phenylene benzbisthiazole) and its model compound has been studied by UV-visible and Raman spectroscopy. Because of the two nitrogens on the heterocyclic ring, spectroscopic features of unprotonated, half-protonated, and fully protonated structures have been identified. For the fully protonated molecule, there is also an increase in conjugation between the phenyl ring and the heterocyclic ring.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.180200312
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