Home Physical Sciences Effects of Take-up Speed of Melt Spinning on the Structure and Mechanical Propertiesof Maximally Laser Drawn PA9-T Fibers
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Effects of Take-up Speed of Melt Spinning on the Structure and Mechanical Propertiesof Maximally Laser Drawn PA9-T Fibers

  • A. J. Uddin , Y. Ohkoshi , Y. Gotoh , M. Nagura , R. Endo and T. Hara
Published/Copyright: March 26, 2013
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Abstract

A new semiaromatic polyamide, PA9-T, was melt-spun at take-up speeds from 200 to 1000m min−1. The as-spun fibers were drawn with CO2 laser-heated drawing to their maximal draw ratio (DRmax). The drawing stress was recorded during this process. The effects of take-up speed of melt-spinning on maximally drawn fibers were characterized through measurements of density, birefringence, wide-angle X-ray diffraction, crystal orientation, tensile testing, and dynamic viscoelastic analysis. All as-spun fibers were essentially amorphous and their birefringence and density increased slightly with the increase of take-up speed. Lower take-up speeds yielded higher DRmax values, and fibers drawn to their DRmax exhibited superior structure and mechanical properties. The tensile strength and Young's modulus achieved were the highest reported to date for PA9-T: 737 MPa and 5.8 GPa, respectively.


Mail address: Y. Ohkoshi, Faculty of Textile Science & Technology, Shinshu University, Ueda 386-8567, Nagano, Japan. E-mail:

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Received: 2005-07-14
Accepted: 2006-01-08
Published Online: 2013-03-26
Published in Print: 2006-07-01

© 2006, Hanser Publishers, Munich

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