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  • 1975-1979  (5)
  • Chemistry  (5)
  • Polymer and Materials Science  (1)
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 22 (1978), S. 719-725 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A variety of blends of ABA poly(styrene-b-isoprene) copolymers with poly(2,6-dimethylphenylene oxide) were prepared. Their compatibility was examined by measuring both the apparent modulus of rigidity and the loss tangent. Several blends showed a unique glass transition temperature between those of the individual components, which indicated compatibility. It was found that only those copolymers which phase separate are compatible with poly(2,6-dimethylphenylene oxide).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 17 (1977), S. 803-805 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Star-shaped block copolymers were used as heat activated adhesives in glass to glass joints. The branches consisted in either AB or ABA poly(styrene-b-isoprene) block copolymers. Tensile shear strengths of simple lap joints were measured for star block copolymers differing in the length or in the number of branches. Values higher than those of the corresponding linear species were obtained. These results were related to the presence of chemical junction points created by coupling the linear copolymers.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 424 (1976), S. 257-264 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermal Behaviour of Li3MnO4. II. α- and β-Li2MnO3By thermal decomposition of Li3MnO4 we obtained two new forms of Li2MnO3: α-Li2MnO3 crystallizes due to Guinier-Simon photographs cubic face-centered with a = 4.092 Å, β-Li2MnO3 hexagonal with a = 4,93, c = 14.24 Å, c/a = 2.89. α-Li2MnO3 is paramagnetic with μ = 3,82 B.M. Below the Neel temperature (≈ 50 K) β-Li2MnO3 is antiferromagnetic. Effective Coordination Numbers, ECoN, are calculated and discussed.
    Notes: Durch thermische Zersetzung von Li3MnO4 wurden zwei neue Formen von Li2MnO3 erhalten: Nach Guinier-Simon-Aufnahmen kristallisiert α-Li2MnO3 kubisch-flächenzentriert mit a = 4,092 Å, β-Li2MnO3 hexagonal mit a = 4,93, c = 14,24 Å, c/a = 2,89. α-Li2MnO3 ist paramagnetisch mit μ = 3,82 B.M., β-Li2MnO3 ist unterhalb der NEEL-Temperatur von ≈ 50 K antiferromagnetisch. Effektive Koordinationszahlen, ECoN, werden berechnet und diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 420 (1976), S. 40-50 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of CsTcO4CsTcO4 crystallizes orthorhombic with a = 5.727, b = 5.921 and c = 14.34 Å. Z = 4, space group Pnma (Nr. 62, I.T.). The metal positions were refined by single crystal data, the oxygen positions first determined: the CsTcO4 structure is a slight distortion of the scheelite arrangement (parameters: see text). The MADELUNG Part of Lattice Energy, MAPLE, „Mean Effective Ionic Radii“, MEIR, and Effective Coordination Numbers, ECoN, are calculated and discussed.
    Notes: CsTcO4 kristallisiert orthorhombisch mit a = 5,727, b = 5,921 und c = 14,34 Å, Z = 4, in der Raumgruppe Pnma (Nr. 62, I.T.). Die Lageparameter von Cs und Tc wurden aus Einkristalldaten verfeinert, die O-Positionen erstmals bestimmt (Parameter: vgl. Text). Es liegt eine Verzerrungsvariante des Scheelittyps vor. Der MADELUNG-Anteil der Gitterenergie, MAPLE, sowie „Mittlere Effektive Ionenradien“, MEIR, und Effektive Koordinationszahlen, ECoN, werden berechnet und diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 424 (1976), S. 128-132 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Oxoniobates (III). II. On the Knowledge of NaNbO2New prepared NaNbO2 crystallizes hexagonal, a = 2.958, c = 11.58, c/a = 3.91, Z = 2, LiNbO2 type of structure. The oxygen parameter z0 is determined by systematic calculations of the Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN: z = 0.1345.
    Notes: Neu dargestelltes NaNbO2 kristallisiert hexagonal, a = 2,958, c = 11,58 Å c/a = 3, 91, Z = 2, im LiNbO2-Typ. Der Sauerstoff-Parameter z0 wird durch systematische Berechnungen des Madelunganteiles der Gitterenergie, MAPLE, und von Effektiven Koordinationszahlen, ECoN, zu z0 = 0, 1345 bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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