| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1985: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Research Abstract |
Permeation behavior of methane/isobutane mixture in biaxially stretched films of lightly crosslinked polyethylene was studied at 25゜C with total pressure of 1 atm. The observed dependence on pressure of permeability coefficient P for each component was able to be well explained in terms of the free-volume model.
The values of P for gases, such as inert gases and carbon dioxide, in poly[1-(trimethylsilyl)-1-propyne] [P(TMSP)] film at 25゜C was found to be independent of pressure below 1 atm, while those of P for isobutane increased with increasing pressure. Sorption of vapors of methanol, ethanol, 2-propanol, and acetone in P(TMSP) was measured at 25゜C Sorption isotherms of the organic vapors started out convex to the pressure axis, then became concave and changed to a BET <II> type shape. The isotherms were analyzed using a modified form of the equation derived by Fowler.
Permeation measurements of binary mixtures composed of carbon dioxide, isobutane, and acetone vapor in P(TMSP) were made at 30゜C. The total pressure of the gaseous mixtures was 1 atm. It was found that each component of carbon dioxide/isobutane or acetone mixtures permeates independently through the polymer film. In isobutane/acetone permeation, P for both components incresed with increasing partial pressure of acetone, and the dependence was explained qualitatively by the freevolume model.
The transport of carbon dioxide and hexane vapor in poly(vinyl acetate) film at temperatures in the vicinity of the glass transition temperature of the polymer exhibited the non-Fickian nature. Permeation measurements of carbon dioxide/hexane in poly(vinyl acetate) film are now going on in our laboratory.
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