Abstract:

Thermotropic liquid crystalline polyarylate fibers with different spinneret draft ratio were melt-spun to study the effect of spinneret draft ratio on the crystal structure and mechanical properties of TLCPAR fibers. WAXD was used to analyze the crystallinity, grain size and orientation of crystalline region. And the mechanical property was also investigated. It is shown that crystallinity increased with spinneret draft ratio, while the grain size did not change much. Orientation of crystalline region was high after spinneret drafting, and didn’t change significantly after increaseed with the increasing of spinneret draft ratio. The strength and modulus increased due to increased crystallinity and orientation.