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  • 1
    Electronic Resource
    Electronic Resource
    Thermal degradation of polyesters by simultaneous TG-DTA/FT-IR analysis (1992)
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 1891-1900 
    Details
    ISSN: 1572-8943
    Keywords: polymers ; TG-DTA/FT-IR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird ein kombiniertes System aus TG-DTA und FT-IR beschrieben. Mit dieser simultanen TG-DTA/FT-IR-Technik wurden spektroskopische und Massenverlustangaben über die thermische Zersetzung technisch wichtiger Polyester, namentlich von Poly(ethylenterephthalat) (PET) und Poly(Butylenterephthalat) (PBT) ermittelt. Die aus PET freigesetzten Gase waren Benzoesäure, Kohlendioxid und Kohlenmonoxid, die aus PBT freigesetzten Gase hingegen Terephthalsäureester und Benzoesäureester.
    Notes: Abstract A combination system of thermogravimetric/differential thermal analysis (TG-DTA) and Fourier-transform infrared absorption spectroscopy (FT-IR) was described. This simultaneous TG-DTA/FT-IR technique gave spectroscopic and weight loss information about the thermal degradation process of engineering polyesters; poly(ethylene terephthalate)(PET) and poly(butylene terephthalate)(PBT). The evolved gases from PET were benzoic acid, carbon dioxide and carbon monoxide, while those from PBT were terephthalic acid esters and benzoic acid esters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01974683
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electronic specific heat of La2−xSrxCu1−yMyO4(M=Ga, Zn): Impurity effects on a D-wave superconductor (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 521-526 
    Details
    ISSN: 1573-7357
    Keywords: 74.25.Bt ; 74.62.Dh ; 74.72.Dn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic specific heat Cel was studied in Ga- and Zn-doped La2−xSrxCuO4 (0.16≤x≤0.22) at T≤10K. Partial substitution of Ga or Zn for Cu suppresses Tc and revives the T-linear electronic specific heat, γT, markedly. The γ(y)/γn vs Tc/Tc0 relation for Zn-doped samples with x≥0.2 is in good agreement with the theoretical one for resonant impurity scattering in a d-wave superconductor, while those for Ga-doped samples and for Zn-doped samples with x ≤ 0.2 deviate slightly from the theoretical curve. The deviation will be discussed in relation to changes in the magnetic properties of 3d electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00768438
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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