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  • 1
    Electronic Resource
    Electronic Resource
    Effect of main-chain double bond on dynamics of polystyrene: an ESR study of macromolecules spin labeled by copolymerization (1985)
    s.l. : American Chemical Society
    Macromolecules 18 (1985), S. 1137-1139 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00148a015
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reexamination of the stereospecific copolymerization of butadiene with isoprene (1983)
    Springer
    Polymer bulletin 9 (1983), S. 223-227 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary 14 systems of the stereospecific anionic butadiene/isoprene copolymerization were reinvestigated using the Kelen-Tüdős (KT) treatment of data. It was found that the classical binary copolymerization model holds for these systems, too; the level of error is relatively moderate and the reproducibility is better than in case of cationic copolymerizations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00283711
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  • 3
    Electronic Resource
    Electronic Resource
    Initiated oxidation of PE and PP in solution (1986)
    Springer
    Polymer bulletin 15 (1986), S. 531-537 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A study was made on the oxidation of a low density polyethylene and of an isotactic and an atactic polypropylene in solution. The solvent was 1,2, 4-trichlorobenzene and the process was investigated at different temperatures, with varying concentrations of the initiator and of the polymer. Under the experimental conditions, a non-accelerating chain reaction proceeds at the beginning of the process. The equation derived from the proposed simplified mechanism describes consistently the dependences of experimentally measured rates on the concentrations of the initiator and of the polymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00281764
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  • 4
    Electronic Resource
    Electronic Resource
    Degradation of HDPE and LLDPE in closed mixing chamber: a comparison (1988)
    Springer
    Polymer bulletin 20 (1988), S. 89-96 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary HDPE and LLDPE (containing n-butyl branches) were degraded in a closed mixing chamber. After degradation some physical and mechanical properties were investigated as a function of the chemical structure of the polymers. The effect of degradation was found different for the two materials. Physical and mechanical properties of HDPE depend strongly on crystallization conditions and chemical irregularities of the polymer chain. The most pronounced change in physical properties was found as an effect of oxygen incorporation into the polymer at the beginning of the process. Tensile properties of the samples have shown rapid destruction after the yield point. Physical and mechanical properties of LLDPE reveal much less dependence on crystallization conditions and changes of the chemical structure. Chemical changes caused by degradation of the polymer do not essentially change the degree of crystallinity under the conditions investigated. Chain breaking of the polymer results in a slight decrease in the tensile properties, which can be attributed to the decrease in the number of tie-chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262254
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  • 5
    Electronic Resource
    Electronic Resource
    Analyse der Linearmethoden zur Bestimmung der Copolymerisations-Reaktivitäts-Verhältnisse. 1. Mitt. Eine neue verbesserte lineare graphische Methode (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 1037-1037 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01776374
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  • 6
    Electronic Resource
    Electronic Resource
    Comments on the interpretation of temperature dependence of processes in polymers (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 589-593 
    Details
    ISSN: 1572-8943
    Keywords: activated state ; ageing compensation effect ; Arrhenius law ; Eyring equation ; polymers ; temperature dependence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The interpretation of the results of thermal measurements followed over decades the Arrhenius law. In recent years an apparently different interpretation (Eyring's equation) has been emerging in the literature on polymers. As the main reason for this, a direct connection to material properties has been claimed. The paper shows some weak points in the Eyring theory and in its application as well. Firstly, the parameters of the two equations are mathematically convertible to each other. Thus Eyring's conceptual quantities (entropy and enthalpy of activation) give no new physical information. Secondly, the Eyring theory postulates an equilibrium for the activated state. In the case of processes, however, in which change is an inherent characteristic, this assumption seems to be unjustified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01984000
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  • 7
    Electronic Resource
    Electronic Resource
    The length of the periods in the periodic system (1954)
    Springer
    Naturwissenschaften 41 (1954), S. 138-138 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00640333
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  • 8
    Electronic Resource
    Electronic Resource
    Über die Bruttokinetik der Thermooxidation von Hochdruckpolyäthylen (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 769-769 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01643924
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  • 9
    Electronic Resource
    Electronic Resource
    Degradation of HDPE and LLDPE in closed mixing chamber: a comparison (1987)
    Springer
    Polymer bulletin 18 (1987), S. 525-532 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Degradation of linear high density polyethylene (HDPE) and butyl branched linear low density polyethylene (LLDPE) was studied during moulding in a closed mixing chamber. At the beginning of the process the rate of oxidative degradation was found faster for LLDPE than for HDPE but later this relation reversed. The degradation mechanism was the same for both types of polyethylenes but the rate of elementary steps depended on the chemical structure of the polymer chain. The differences were attributed to the structural differences in the original materials and the products formed during degradation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255337
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of reaction conditions on LDPE oxidation (1986)
    Springer
    Polymer bulletin 16 (1986), S. 159-165 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The formation kinetics of functional groups and the kinetics of the molecular mass change were investigated in low density polyethylene oxidized under different conditions in static and dynamic equipments. The processes studied were found highly sensitive to the oxygen supply. With the increase of [O2] higher rate of oxidation and increasing fragmentation can be observed. If [O2] is reduced, crosslinking will dominate. Mechanical effect was significant only during the melting of the polymer. Under dynamic conditions, diffusion control was always found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955486
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