Studies have been made by a sorption-desorption procedure on the diffusion of water vapor at relative humidities of from 30 to 85% into the polymers, polyvinyl acetate cellulose acetate (37.9% acetyl), cellulose nitrate (12.0% N), 6–10 nylon, and polyvinyl alcohol. Diffusion of water in ...
One factor influencing the suitabilty of fabrics for clothing is resistance to the passage of water vapor. Measurement of the low resistances of woven fabrics requires a different technique from that for the high resistances of waterproofing and packaging materials, since the resistances are close to...
Transient moisture sorption experiments have been performed in order to examine diffusion of water vapor in paper sheets. A Moisture Sorption Tester (MST), designed and built in house, was used to obtain transient moisture sorption curves and sorption isotherms of paper. The papers were made using...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook Vapor diffusion Movement of water vapor through a material; water vapor can diffuse through even a solid material if the material’s permeability is high enough. ...
Diffusion Coefficient of water vapor in a gas mixture « on: July 01, 2019, 02:29:10 AM » Can anyone please suggest a formula to calculate the diffusion coefficient of water vapor in a gas mixture of N2, CO2 ,O2, and H2O at 1 atm and 0 to 200 °C.I found this formula. ...
The diffusivity in the radial direction was always larger than that in the axial direction despite the variation of the relative humidity differential. This fact implied the anisotropic distributions of air voids and aggregates in the asphalt mixture specimens, which assisted water vapor in diffusing ...
The structure of amorphous region in silk fibroin film has been investigated with three kinds of water sorption techniques as follows; successive differential sorption (DS), integral sorption into dried sample (IS1) and vapor pre-sorbed one (IS2). Sample films were obtained by solvent casting fro...
Standard Test Methods for Water Vapor Diffusion Resistance and Air Flow Resistance of Clothing Materials Using the Dynamic Moisture Permeation Cell (Withdrawn 2015) 来自 掌桥科研 喜欢 0 阅读量: 3 标准号: ASTM F2298-03(2009)e1 摘要: 1.1本试验方法涵盖了用于保护材料的织物,膜和膜层压板的水汽传输...
Effective water vapor diffusion coefficient of snow under a temperature gradient (Paper 2000WR900014) doi:10.1029/2000WR900014Water Resources ResearchSokratov, Sergey A.Maeno, Norikazu
The constant entropy of water vapor is used to show that the heat of transfer exceeds the activation energy for bound water diffusion by about 25 percent.doi:10.1007/BF00351584R. M. NelsonSpringer-VerlagWood Science & TechnologyR. M. Nelson.Diffusion of bound water in wood[J]. Wood ...