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| Titel: |
On the Relaxation Rate in the Primary Transition Region of Amorphous Polymers |
| Auteur: |
Hagstrom, B. Kubat, J. Rigdahl, M. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 9 (1981) nr. 1 pagina's 37-43 |
| Jaar: |
1981-08-01 |
| Inhoud: |
It is known that the stress relaxation behaviour of solids is largely independent of their structure. This similarity is expressed as F ≈ 0.1σ0* where F is the maximum slope of the relaxation curve in a stress In(time)-diagram and σ0* the initial effective stress of the experiment. This relation is found to be valid in temperature regions where no transitions occur; it is not expected to hold in the primary transition region of amorphous polymers. With reference to the theory of a damped Debye lattice, it is shown that the maximum value of F/σ0* is ca. 0.28 in this region. It is further pointed out that Fσ0* varies with temperature in a way reminiscent of that of the mechanical loss factor. The predictions are in agreement with experimental facts. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 8 gevonden artikelen
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