Investigation of the structural changes in high-speed spun yarns of polyamide 6 by means of WAXS employing synchrotron radiation
✍ Scribed by Gerhilt Schmack; Roland Beyreuther; Liane Häußler; Peter Joachim Tidick; Hans Gerhard Zachmann; Michel Henry Jean Koch
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 354 KB
- Volume
- 195
- Category
- Article
- ISSN
- 1022-1352
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The melting and recrystallization of yarns of polyamide 6 spun at different take‐up velocities ranging from 3 500 to 5 600 m/min was investigated by means of wide‐angle X‐ray scattering (WAXS) employing synchrotron radiation and by differential scanning calorimetry (DSC). It was shown that the first peak in the double melting peak of the DSC‐curves is caused by the melting of the γ‐crystals. The melting point is increased by approximately 5°C when the take‐up velocity is increased from 3 500 m/min to 5 600 m/min. The addition of calcium stearate to the material has no effect on the thermal stability of the crystals, but seems to have some effect on the crystallization rate.