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- W1617885864 abstract "Polyimide membranes of a thickness range from under 0.01 micron m to greater than 1 micron m can be produced at an estimated cost of 50 cents per sq m (plus the cost of the polymer). The polymer of interest is dissolved in a solvent which is solube in water. The polymer or casting solution is allowed to flow down an inclined ramp onto a water surface where a pool of floating polymer develops. The solvent dissolves into the water lowering the surface tension of the water on equently, the contact angle of the polymer pool is very low and the edge of the pool is very thin. The solvent dissolves from this thin region too rapidly to be replenished from the bulk of the pool and a solid polymer film forms. Firm formation is rapid and spontaneous and the film spreads out unaided, many feet from the leading edge of the pool. The driving force for this process is the exothermic solution of the organic solvent from the polymer solution into the water." @default.
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- W1617885864 date "1978-01-01" @default.
- W1617885864 modified "2023-09-28" @default.
- W1617885864 title "The production of ultrathin polyimide films for the solar sail program and Large Space Structures Technology (LSST): A feasibility study" @default.
- W1617885864 hasPublicationYear "1978" @default.
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