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Effect of crosslink density on transport of industrial solvents through polyether based polyurethanes
Author(s) -
Desai Sonal,
Thakore I. M.,
Devi Surekha
Publication year - 1998
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(1998100)47:2<172::aid-pi43>3.0.co;2-2
Subject(s) - sorption , toluene , hildebrand solubility parameter , homologous series , benzene , solubility , polyurethane , xylene , solvent , diffusion , polymer , materials science , polymer chemistry , chemical engineering , flory–huggins solution theory , thermodynamics , chemistry , organic chemistry , composite material , adsorption , engineering , physics
Polyurethanes based on PPG 2000 with variable concentrations of TDI and TMP were prepared and used for sorption studies, employing homologous series of hydrocarbons such as benzene, toluene and xylene. The sorption was observed to be non‐Fickian in nature. The solubility parameter of the polyurethane series was observed to be 9·7(calcm ‐3 ) 1/2 . The polymer solvent interaction parameter χ was found to be lowest in benzene, suggesting higher interaction with it. The sorption and diffusion coefficients were observed to increase with a decrease in the degree of crosslinking. Molecular weights between crosslinks were calculated using the Flory–Rehner equation and compared with those obtained theoretically. © 1998 Society of Chemical Industry