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Spectra of the internal friction of cured epoxy-amine networks based on diane and an aliphatic epoxy oligomers are studied using an aliphatic oligoamine hardener. It is shown that secondary relaxation is observed in the spectra for diane oligomer in the investigated range of temperatures, but not for aliphatic oligomers or cured epoxy amine systems based on them. Using van Krevelen calculations based...
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