Resistance, polymer electrical properties temperature

Poly(arylene ether sulfone)s (PAES)s have been known since the 1970 s. They are tough linear polymers and possess a number of attractive features, such as excellent high-temperature resistance, good electrical properties, and good hydrolytic stability. The topic has been reviewed previously in the hterature. ... 

Plasma-deposited siUcon nitride contains large amounts of hydrogen, typically in the range of 20—25 atomic % H, and has polymer-like properties. The electrical resistivity of the film depends on the deposition temperature, the film stoichiometry, and the amounts of hydrogen and oxygen in the film. 

As part of an effort to develop high-performance, high-temperature-resistant polymers for microelectronics applications, we also recently described a series of both partially fluorinated and nonfluorinated poly(aryl ether ketone)s containing amide, amide-imide, cyano oxadizole, or pyridazine groups and characterized their thermal and electrical properties.11... 

Metal Oxide-Polymer Thermistors. The variation of electrical properties with temperature heretofore described can be used to tremendous advantage. These so-called thermoelectric effects are commonly used in the operation of electronic temperature measuring devices such as thermocouples, thermistors, and resistance-temperature detectors (RTDs). A thermocouple consists of two dissimilar metals joined at one end. As one end of the thermocouple is heated or cooled, electrons diffuse toward... 

The ball milling of poly(vinyl chloride) and acrolein gave a product with improved heat stability and electrical properties (25). The milling was performed at 108 rpm and at room temperature for four hours using porcelain balls 1.2-2 cm in diameter. After milling with 20% of acrolein for two hours, the decomposition temperature of the polymer product increased from 150 to 160° C and the darkening temperature from 200 to 220° C. After four hours the two temperatures were, respectively, 220 and 280° C. The ball milled product, also, showed a 37-fold improvement in volumetric resistance and a 15000-fold improvement in surface electrical resistance over the original poly(vinyl chloride). 

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