Abstract
THE mechanical energy losses in polyamide fibres have been determined from the damping of low-frequency free torsional vibrations (frequency approximately 0.3 c./sec.) between 20° and 130° C. A graph of energy loss against temperature shows a large absorption peak at 78° C. for undrawn dry 6.6 nylon filament. As the degree of orientation of the 6.6 nylon filament is increased by drawing, the absorption peak shifts to a higher temperature and the energy losses have a higher value. Fig. 1 shows the curves obtained for filaments of different degrees of orientation (draw ratio 1 (undrawn), 2, 3 and 4). The curve of the absorption peak is approximately symmetrical for undrawn 6.6 nylon; it changes in shape when the fibre is drawn. In a recent paper, Thompson and Woods1 reported similar results for polyethylene terephthalate for different degrees of orientation.
Similar content being viewed by others
Article PDF
References
Thompson, A. B., and Woods, D. W., Trans. Farad. Soc., 52, 1383 (1956).
Schmieder, K., and Wolf, K., Kolloid Z., 134, 149 (1953).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
THOMAS, A. Effect of Change in Temperature on the Torsional Energy Losses in some Polyamides. Nature 179, 862 (1957). https://doi.org/10.1038/179862a0
Issue Date:
DOI: https://doi.org/10.1038/179862a0
This article is cited by
-
On the dynamic mechanical behavior of nylon 66
Kolloid-Zeitschrift & Zeitschrift für Polymere (1970)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.