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Production and properties of highly oriented polyoxymethylene by die-drawing

✍ Scribed by A. K. Taraiya; M. S. Mirza; J. Mohanraj; D. C. Barton; I. M. Ward

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
162 KB
Volume
88
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Highly oriented monofilaments were produced by a high‐temperature die‐drawing process followed by tensile drawing. It was shown that a successful high‐speed process required high‐quality melt‐extruded rod. The mechanical properties and structure of the die‐drawn products were investigated by means of tensile and bending tests, dynamic mechanical measurements, DSC, and X‐ray diffraction. The bending modulus and the tensile strength increased with increasing draw ratio. It was also observed that at high draw ratios the γ‐dispersion peak in the dynamic mechanical tan δ curve, which is associated with main chain micro‐Brownian motion in the amorphous regions, diminishes, implying that these chains become taut. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1268–1278, 2003

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