ISSN:
1572-8935
Keywords:
Plastification
;
Polypropylene
;
Supercritical CO2 dyeing
;
Penetration
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract Polypropylene fibers were dyed in supercritical carbon dioxide system and the results were compared with those of fiber dyed in water system. Dye uptake value calculated by a UV spectrum indicated that polypropylene fiber dyeing was much better in carbon dioxide than in water. Optical microscopical analysis showed that dye molecules had diffused thoroughly into fiber in CO2 because of the excellent compatibility between the dye and the CO2. X-ray and birefrigence analysis demonstrated that plastification caused by the implementation of CO2 made molecular chain more mobile and led to an increase in the dyeing of polypropylene fibers. Moreover a mechanical test and DSC analysis indicated that the fiber structure was not damaged when the fabric was dyed at 100 °C. Hence dyeing polypropylene using CO2 as a transport medium was very feasible and worthy of further development.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10965-006-0115-y
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