Resistance-humidity characteristics

Resistance-humidity characteristics of the Ti02-Sn02 ceramic sensor at 40 °C. 

Resistance-humidity characteristics of a swelling-type sensor consisting of polyethylen-oxide-sorbitol. 

Resistance-humidity characteristics of Cr Oj with MgO and Ti02 incorporated. 

Resistance (R)-humidity characteristics of the MgCrj04-Ti02 ceramic sensor at several temperatures. 

Grade CE This grade is similar to Grade C in construction, but a different resin system provides improved electrical properties and humidity resistance. Electrical characteristics are similar to Grade XX. However, its use at voltages greater than 600 is not intended. Molded tubes are available, but the seams are weak electrically. The properties of rods are the same as laminates. 

The hygroscopic and humectant properties of com symps are of great importance in many apphcations. Depending on the type of symp and on the specific conditions of temperature and humidity, the products may either resist or facihtate moisture loss or moisture absorption. The abihty to attract moisture or retard its loss increases with increasing DE value. Prevention of moisture pickup is more characteristic of symps having low DE values. 

Cobalt(II) chloride was dissolved in poly(amide acid)/ N,N-dimethylacetamide solutions. Solvent cast films were prepared and subsequently dried and cured in static air, forced air or inert gas ovens with controlled humidity. The resulting structures contain a near surface gradient of cobalt oxide and also residual cobalt(II) chloride dispersed throughout the bul)c of the film. Two properties of these films, surface resistivity and bullc thermal stability, are substantially reduced compared with the nonmodified condensation polyimide films. In an attempt to recover the high thermal stability characteristic of polyimide films but retain the decreased surface resistivity solvent extraction of the thermally imidized films has been pursued. 

Ecoflex F was designed to be a strong and flexible material with mechanical properties similar to PE. The films are tear-resistant and flexible, as well as resistant to fluctuations in water and humidity. Ecoflex F is a thermoplastic and can be melt-processed on standard polyolefin equipment (see Sect. 5). It is mainly used in film applications. The very high toughness and failure energy represent product characteristics of Ecoflex F that significantly exceed the respective properties of PE films. 

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