Abstract
The microstructure and the flexural behaviour of two highly crosslinked epoxy mixtures have been investigated. Besides the usual α and β relaxations appearing for any epoxy mixture, an additional ω relaxation, located slightly above room temperature, was evident for the mixture with higher crosslink density. This relaxation, which seems to be related to microstructural variations originating in a free volume increase, permits us to explain the lower mechanical properties of the larger higher crosslinked mixtures in the temperature range between the β and α relaxations. Whilst at room temperature the flexural modulus did not show any significant variation upon testing rate and the strength slightly increased for both epoxy mixtures.
| Original language | English |
|---|---|
| Pages (from-to) | 5573-5577 |
| Number of pages | 5 |
| Journal | Polymer |
| Volume | 38 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 1997 |
| Externally published | Yes |
Keywords
- d.m.t.a.
- Epoxy mixtures
- Mechanical