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Priess C.,Freudenberg New Technologies SE and Co. KG | Katzenmaier V.,Freudenberg New Technologies SE and Co. KG | Kreiselmaier R.,Freudenberg New Technologies SE and Co. KG | Traber B.,Freudenberg Sealing Technologies | Beck K.,Freudenberg New Technologies SE and Co. KG
KGK Kautschuk Gummi Kunststoffe | Year: 2014

In this article the potential of the nuclear magnetic resonance method (NMR) to analyze the oxidative aging of elastomers is discussed. For this purpose an EPDM compound is examined. It is found that the NMR data can be interpreted very well by a biexponential approach. The NMR results are in good agreement with a model calculation on the effect of oxidative aging on the network chain density. So the NMR data provide a deep insight into the mechanisms of oxidative aging. Finally the NMR results are compared to chemiluminescence and stress relaxation data. This shows that a prediction of lifetime based on NMR data should be viewed rather critically at the present time and the other two methods are preferable for this purpose. © 2014, Huthig GmbH. All rights reserved. Source


Haehnel A.P.,Karlsruhe Institute of Technology | Wenn B.,Hasselt University | Kockler K.,Karlsruhe Institute of Technology | Kockler K.,Freudenberg New Technologies SE and Co. KG | And 5 more authors.
Macromolecular Rapid Communications | Year: 2015

A recent response on a publication from our team investigating solvent effects on propagation rate coefficients is commented. Among other issues, we point to the fact that the response interprets only a subset of the data provided in our original contribution. We respond to a recent response on a publication from our team investigating solvent effects on propagation rate coefficients. Among other issues, we point to the fact that the response interprets only a subset of the data provided in our original contribution. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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