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Copolyester studies. VII. The dyeing behavior of undrawn fibers derived from tetramethylene terephthalate: Poly(tetramethylene oxide) random block copolymers
Author(s) -
Boussias C. M.,
Peters R. H.,
Still R. H.
Publication year - 1981
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.1981.070261215
Subject(s) - materials science , dimethyl terephthalate , amorphous solid , adsorption , polymer chemistry , diffusion , copolymer , disperse dye , dyeing , oxide , fiber , polymer , chemical engineering , chemistry , composite material , thermodynamics , organic chemistry , polyester , physics , engineering , metallurgy
A series of copolymers based on poly(tetramethylene terephthalate) containing poly(tetramethylene oxide) blocks whose molecular weights ranged from 1000 to 5000 in concentrations from 10 to 30% by weight was prepared. The polymers were melt spun into fibers and the undrawn fibers dyed with a disperse dye at three temperatures. The equibrium adsorption and diffusion coefficient of the dye increased with both the molecular weight and concentration of the polyether. The equilibrium adsorption varied linearly with both the molecular weight and concentration. It has been assumed that the equilibrium dye partition coefficient K M gives a parameter of the accessibility, V , of the fiber for dye. If the diffusion coefficient D M is given by D M = VD o /τ , where D o is the diffusion coefficient of the dye in the amorphous regions and τ is a tortuosity factor, a good correlation can be obtained between K M and D M , suggesting that changes in D o /τ vary in a systematic fashion.