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The effect of structural changes on dye diffusion in poly(ethylene terephthalate)

✍ Scribed by J. H. Dumbleton; J. P. Bell; T. Murayama

Publisher: John Wiley and Sons
Year: 1968
Tongue: English
Weight: 833 KB
Volume: 12
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1968.070121109

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✦ Synopsis

The diffusion of a disperse dye, 1-amino-4-hydroxyanthraquinone (C.I. Disperse Red 15) into poly(ethy1ene terephthalate) fibers has been studied as a function of heatsetting temperature and draw ratio. It was found that the dynamic loss modulus E", measured under the dyeing conditions, was related to the dye diff usivity D. This indicates that the diffusion is controlled by the mobility of the polymer chain segments. Both the diffusivity and dye saturation values do not vary monotonically with heatsetting temperature but exhibit a minimum at a heahetting temperature near 175°C. X-ray diffraction measurements were used to show that this behavior is attributable t.0 crystallinity and crystal size changes resulting from heat-setting.

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