✦ LIBER ✦

Effect of crosslink density on transport of industrial solvents through polyether based polyurethanes

✍ Scribed by Desai, Sonal; Thakore, I. M.; Devi, Surekha

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 243 KB
Volume: 47
Category: Article
ISSN: 0959-8103
DOI: 10.1002/(sici)1097-0126(1998100)47:2<172::aid-pi43>3.0.co;2-2

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✦ Synopsis

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 9É7 (cal cm~3)1@2. The polymer solvent interaction parameter s was found to be lowest in benzene, suggesting higher interaction with it. The sorption and di †usion coefficients were observed to increase with a decrease in the degree of crosslinking. Molecular weights between crosslinks were calculated using the FloryÈRehner equation and compared with those obtained theoretically.

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