ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The polymer-grafted carbon black (GC) was prepared by an anionic polymerization of methyl methacrylate in the presence of carbon black previously treated with n-butyl lithium. The electrical properties of the resistors obtained using the GC material were studied. For a comparison with the above resistors, resistors with a smaller grafting ratio or without grafting were also prepared. It was found that the resistivity increased with an increase of the grafting ratio and that, by comparing resistors with similar resistivities, resistivity variation with temperature was less for higher grafting ratios. The resistors with a resistivity in the range of ca. 103-106 Ω·cm showed a remarkably large positive anomaly, but, for a resistivity larger than 107 Ω·cm, the temperature coefficient was negative.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1984.070290123
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