Results 221 to 230 of about 22,597 (295)

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
openaire   +1 more source

Sonochemical synthesis of flower-like ZnO assembled by hollow cones toward water vapor permeability and water resistance enhancement of waterborne film

, 2020
In this study, flower-like ZnO assembled by hollow cones (F-ZnO-HCs) were synthesized via sonochemical route and the related morphology and structure of product were characterized.
Y. Bao, Lu Gao, Caiping Feng, Jianzhong Ma, Wenbo Zhang, Chao Liu, D. Simion   +6 more
semanticscholar   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

External factors and nanoparticles effect on water vapor permeability of pectin-based films

Journal of Food Engineering, 2019
Permeation of water vapor through hydrophilic films is a rather complicated phenomenon. Water vapor permeability (WVP) of pectin films containing silicon dioxide nanoparticles was investigated under different temperature and relative humidity (RH ...
Aldo Stefano Spatafora Salazar, Paola Alejandra Sáenz Cavazos, H. Paz, A. V. Fragoso   +3 more
exaly   +2 more sources

Size effect of carnauba wax nanoparticles on water vapor and oxygen barrier properties of starch-based film.

Carbohydrate Polymers, 2022
Barrier properties against water vapor and oxygen were critical for starch-based nanocomposite film. In this study, size regulation of carnauba wax nanoparticle was utilized to adjust multi-scale structure of starch-based film, which intended to improve ...
Siyuan Liu, Lin Li, Bing Li, Jie Zhu, Xiaoxi Li   +4 more
semanticscholar   +1 more source

Moisture characterization of cementitious material properties: Assessment of water vapor sorption isotherm and permeability variation with ages

Construction and Building Materials, 2015
Rafik Belarbi, A Ait-Mokhtar
exaly   +2 more sources

Permeability of water and water vapor through cellulosic membranes

Journal of Applied Polymer Science, 1975
To elucidate the water transport mechanism through homogeneous membranes, water and water vapor permeation through crosslinked cellulose membranes, cellulose diacetate, and cellulose triacetate membranes are studied. It is found that the water flux increases with the degree of hydration; and as for cellulose membranes, the degree of hydration is an ...
M. Kawaguchi, T. Taniguchi, K. Tochigi, A. Takizawa   +3 more
openaire   +1 more source

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?
openaire   +1 more source