Premium
Dependence of disperse dye diffusion on the structure and morphology of oriented heat–set polyester fibres
Author(s) -
Radhakrishnan J,
Kanitkar U P,
Gupta V B
Publication year - 1997
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1997.tb01869.x
Subject(s) - polyester , tortuosity , amorphous solid , diffusion , materials science , disperse dye , volume (thermodynamics) , orientation (vector space) , thermal diffusivity , porosity , composite material , chemical engineering , thermodynamics , crystallography , chemistry , geometry , physics , mathematics , engineering
The structural parameters that predominantly influence dye diffusion behaviour in heat–set polyester fibres have been identified. Dye diffusion has been shown to depend on two factors: the volume of the accessible region (amorphous region) and the tortuosity of the dye diffusion path. The accessible region can be represented in terms of the amorphous volume per crystal, and the tortuosity can be expressed quantitatively by combining the orientation of the amorphous phase and the nature of coupling between the amorphous and the crystalline regions. An integrated model has been proposed by combining these parameters, and has been shown to correlate well with dye uptake in polyester fibres heat–set under slack and taut conditions.