Results 201 to 210 of about 21,791 (262)

Water Vapor Permeability of Polypropylene

Fusion Science and Technology, 2011
To understand the water vapor transport through a polypropylene film at near ambient temperature, water vapor permeation and sorption measurements were carried out using tritiated water as tracer.
Yuka Togashi, Masanori Hara
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The permeability of membranes to water vapor

Desalination, 1967
Abstract The aim is to establish, for a given membrane, a curve showing the permeability to water vapor in relation to the temperature. Evaporation is effected in a thermostatized cell. The membrane to be tested lies on distilled water. Air having the same temperature as the distilled water, but entirely dried, circulates above the membrane at a ...
A. Van Haute, Y. Henderyckx
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Water vapor‐permeable polyurethane ionomer

Journal of Applied Polymer Science, 2006
AbstractThe reaction of toluene diisocyanate with 2,2,3,3‐tetrafluoro‐1‐propanol (fluoro compound) or 3‐glycidoxypropyl trimethoxysilane(siloxane compound) and other additives to form the structure of the fluoro‐based or siloxane‐based polyurethane (PU) ionomer has been proven by infrared spectra. Experimental results indicated that the amount of water
J. L. Luo, Y. J. Liou, T. M. Chin, Y. M. Kuo, D. Y. Chao   +4 more
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Characterization of water vapor permeable membranes

Desalination, 2002
Air permeability and water vapor permeability of naphion membranes were measured using specially built instruments. Air permeability was almost zero. Water vapor permeability was zero during an incubation period. After the incubation period, the permeability became large and then gradually decreased with time.
Akshaya Jena, Krishna Gupta
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Water‐vapor‐permeable polyurethane resin

Journal of Applied Polymer Science, 2002
AbstractThe reaction of methylene diphenylene diisocyanate with ethylene glycol, dimethyl dimethoxysilane, dimethyl diethyloxysilene, and other additives in the presence of N,N‐dimethylformamide and toluene to form the structure of water‐vapor‐permeable polyurethane (PU) resin was proven with Fourier transform infrared spectra.
C. P. Chwang, S. N. Lee, J. T. Yeh, C. Y. Chen, D. Y. Chao   +4 more
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The Permeability of Rubber to Water Vapor

Rubber Chemistry and Technology, 1943
Abstract In connection with a study of various kinds of vulcanized rubber, including rubber films from vulcanized latex and latex films vulcanized in the dry state, it seemed desirable to investigate the packing of the latex particles. To what extent, for example, are these still present or are they coalesced?
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