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Effect of supercritical carbon dioxide dyeing conditions on the chemical and morphological changes of poly(ethylene terephthalate) fibers
Author(s) -
Hou Aiqin,
Xie Kongliang,
Dai Jinjin
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20066
Subject(s) - supercritical fluid , crystallinity , materials science , differential scanning calorimetry , supercritical carbon dioxide , scanning electron microscope , dyeing , chemical engineering , ethylene , composite material , polymer chemistry , chemistry , organic chemistry , physics , thermodynamics , engineering , catalysis
Commercially available regular denier poly(ethylene terephthalate) (PET) fabrics were used in this investigation. PET fabric samples were wound on a bobbin and then exposed to supercritical CO 2 under conditions representing a typical supercritical CO 2 dyeing cycle. Infrared spectroscopy, X‐ray diffraction, differential scanning calorimetry, and scanning electron microscopy were used to characterize the chemical and morphological changes of the PET fibers. The results showed that exposure to supercritical CO 2 did not cause chemical changes in the fibers; the crystal size and the T mp of the PET fabric after treatment in supercritical CO 2 did not significantly change; the crystallinity decreased; and the treatment in supercritical CO 2 at higher temperature caused surface morphology changes (increased oligomer migration). However, there was no pitting, cracking, or crazing on the surface of the treated fibers. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 2008–2012, 2004