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  • 1
    Electronic Resource
    Electronic Resource
    Thermal oxidative degradation of poly-lactic acid (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 514-517 
    Details
    ISSN: 1435-1536
    Keywords: Thermal degradation ; Poly-Lactic Acid ; Molecular weight changes ; Degradation of Polymers ; Activation energy of chain scission ; chain stiffening ; Electronic spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The study of molecular weight and rate of change of molecular weight during thermal degradation of PLA suggests the random nature of chain scission with activation energy of 28 kcal/mol. The rate of weight loss indicates the formation of the volatiles by chain end initiation. The melting temperature of the polymer initially decreases and afterwards increases with increase in time of heating due to chain stiffening.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01452999
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Unconditional bases and the order structure (1986)
    Springer
    Periodica mathematica Hungarica 17 (1986), S. 279-294 
    Details
    ISSN: 1588-2829
    Keywords: Primary 46A05, 46A40, 46A45 ; Secondary 46A35 ; Schauder base ; bounded multiplier ; subseries ; unconditional ; sequence spaces ; Köthe andβ-dual ; normal topology ; monotone ; normal ; perfect ; cone ; regular ; sequentially regular ; fully regular fully sequentially regular ; normal ; minihedral
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The paper deals with an analytic characterization of unconditional bases, a characterization of the unconditional character of a Schauder base for the associated cone and a number of counterexamples supporting various conditions appearing in the theorems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01848389
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On matrix transformations (1982)
    Springer
    Periodica mathematica Hungarica 13 (1982), S. 325-328 
    Details
    ISSN: 1588-2829
    Keywords: Primary 46A45 ; Secondary 40C05 ; Entire ; normal ; nuclear ; perfect and simple sequence spaces ; normal topology ; matrix transformation and its transpose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01849244
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Thermal degradation of polystyrene — unperturbed chain dimensions of degraded polymers (1981)
    Springer
    Colloid & polymer science 259 (1981), S. 1081-1083 
    Details
    ISSN: 1435-1536
    Keywords: Unperturbed chain dimensions ; Thermal degradation ; Polystyrene ; High impact polystyrene ; SAN ; ABS ; Steric factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Intrinsic viscosity and viscosity average molecular weight data of thermally degraded polystyrene and its co-polymers have been used to determine the unperturbed chain dimensions. Analysis of these data according to Stockmayer and Fixman equation suggests that probably during thermal degradation in air no branched polymers are formed and the chain dimensions $$[〈 r_0^2 〉 /\bar M_v ]^{{\raise0.5ex\hbox{$\scriptstyle 1$}\kern-0.1em/\kern-0.15em\lower0.25ex\hbox{$\scriptstyle 2$}}} $$ remain as for the linear polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01524893
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    Paper (German National Licenses)
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