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Preparation of ultra-high modulus polyvinyl alcohol fibers by the zone-drawing method

✍ Scribed by Toshio Kunugi; Tamio Kawasumi; Takashi Ito

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
581 KB
Volume
40
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

The zone‐drawing method has been applied to prepare ultra‐high modulus polyvinyl alcohol fibers. First, the suitable temperature for zone‐drawing was decided. In the first zone drawing, when drawing temperature was as high as near melting point, the highest draw ratio and modulus were obtained. The modulus was further increased by repeating zone drawing and heat treatment. In this study, the highest dynamic moduli were 115 GPa at room temperature and 42 GPa at 200Β°C. The fiber has a sharp melting peak that appeared at 246Β°C and a small peak at 260Β°C in the DSC curve.

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