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Relationship between Integral Diffusion Coefficient and Rate Constant in Dyeing Polyethylene terephthalate) Fibres with Disperse Dyes
Author(s) -
MILITKÝ JIŘÍ
Publication year - 1979
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.1478-4408.1979.tb03488.x
Subject(s) - dyeing , polyethylene terephthalate , diffusion , constant (computer programming) , poly ethylene , materials science , ethylene , fick's laws of diffusion , reaction rate constant , simple (philosophy) , thermodynamics , composite material , chemistry , physics , organic chemistry , computer science , classical mechanics , kinetics , programming language , catalysis , philosophy , epistemology
Practical methods of computing the diffusion coefficient D and rate constant Kfrom the Cegarra–Puente equation for dyeing poly (ethylene terephthalate) fibre with disperse dyes are given. A simple approximate relationship has been derived enabling the corresponding D to be found when K is known. A general technique is also described for approximation of complicated diffusion equations by means of simpler relationships.