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Mechanics of Composite Materials

, Volume 34, Issue 3, pp 295–298 | Cite as

Natural aging and dynamic mechanical properties of polymer matrices

  • I. I. Perepechko
  • Z. E. Tekutieva
Article

Abstract

The influence of natural six-month aging at 293 K of two kinds of epoxy resins with different network density on their dynamical properties was studied. All the samples were examined by forced resonance oscillations at a frequency of 200 Hz in the range of 120–520 K. The components of the complex Young's modulus E′, E″, tan δ, and low-frequency velocity of sound were measured. The basic temperature transitions including Tg and the network density ν were determined from the experimental data. It was established that after aging of epoxy resins cured by the cross-linking agent meta-phenylenediamine their network density ν decreased (“cold” degradation). By using the cross-linking agent 2,6-diaminopyridine, ν and Tg increased. An attempt is made to explain the nature of this phenomenon.

Keywords

Polymer Experimental Data Mechanical Property Epoxy Temperature Transition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Z. E. Tekutieva, I. I. Perepechko, A. I. Efremova, B. A. Rosenberg, and N. S. Enikolopyan, “Cold” degradation in cross-linked epoxy polymers in the glassy state,” Dokl. Akad. Nauk SSSR,266, No. 2, 413–415 (1982).Google Scholar
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Copyright information

© Plenum Publishing Corporation 1998

Authors and Affiliations

  • I. I. Perepechko
  • Z. E. Tekutieva

There are no affiliations available

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