THE FINE STRUCTURAL DIFFERENCES BETWEEN “POT SPINNING” AND “CONTINUOUS SPINNING” HIGH TENACITY RAYONS

Abstract

The differences between the fine structures of “pot spinning” and those of “continuous spinning” high tenacity rayons were investigated by determining stress-strain curves in various mediums.Distribution of cohesive bonds in “pot spinning” sample was comparatively in amorphous regions or low cohesive energy regions. So “pot spinning” sample had broad R. H. 65%_??_0.5N NaOH order regions in the stress-strain curves. There was no difference in high cohesive regions (above 1.25N NaOH order) between “pot spinning” and “continuous spinning” high tenacity rayons. Therefore, it is estimated that “pot spinning” sample has more freedom of network structure and higher degree of uniformity of chain-length between crystallites than “continuous spinning” one.In order to observe the effects of time factor on the formation of cohesive bonds in the spinning process, the samples dried continuously soon after the spinning and washing were compared with those dried long after that. From the results, it was observed that the stress-strain curves of the latters in low swelling mediums were relaxed.