Abstract
Spinning speed and quench air temperature are two important parameters in spin ning. Yarns were spun at varying speeds and two quench air temperatures to study their effects on the spun yarn structure and properties. The spun yarns were charac terized using stress-strain testing, differential scanning calorimetry, and dynamic me chanical testing. Tensile parameters, crystallizability data from differential scanning calorimetry, and viscoelastic properties showed strong sensitivity to spinning speed and some effect of quench air temperature at high spinning speeds. These spun yarn characterizations would therefore be useful tools to establish spun yarn structure prop erty processing relationships and help optimize the spin/draw process. Various spun yarn characteristics suggest that processing parameter control would be more critical at high spinning speeds.
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