By Raymond B. Seymour (auth.), Raymond B. Seymour (eds.)
Those who realize that our sleek life-style depends, to a wide volume, at the use of natural polymers as thermal and elec trical insulators, should be shocked to profit that categorical plastics can also be used as conductors of electrical energy. as well as demon strating the flexibility of polymers, this use as conductors will bring about advancements that have been impossible with different to be had fabrics of development. it is a new box that is growing to be quickly as a result of in depth study and developmental efforts by way of many various commercial, governmental and college investigators. lots of those researchers suggested advances during this artwork at a symposium on conductive polymers backed through the yank Chemical Society's department of natural Coatings and Plastics Chemistry held on the moment Chemical Congress of the North American Continent at Las Vegas, in August 1980. The court cases of this well timed symposium are offered during this publication. The editor needs to take this chance to specific his grati tude to the authors who contributed to this booklet and to the ACS natural Coatings and Plastics department for sponsoring this attempt. Raymond B. Seymour division of Polymer technological know-how collage of Southern Mississippi Hattiesburg, MS 39401 v CONTENTS 1 New Horizons in Conductive Polymers Raymond B. Seymour Synthesis and Characterization of Conductive 7 Palladium Containing Polyimide motion pictures • T.L. Wohlford. J. Schaff. L.T. Taylor.
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BIGG AND E. JOSEPH BRADBURY Figure 6 shows the shielding effectiveness of the nickel coated glass fiber-polycarbonate composite. At low frequencies it shows a shielding response greater than that of the copper plate. This anomaly is most likely caused by the plastic composite's greater aperture sealing ability than the copper plate. At higher frequencies, however, more radiation is capable of getting by the composite than the copper panel. The response of the nickel coated glass fiber-polycarbonate composite is similar to the most highly loaded carbon black composite.
EXPERIMENTAL Electrical Measurements The electrical resistivities of the base polymers and the highresistivity composites were measured on a Keithly Instrument Company 6105 resistivity adaptor. The resistivities of the more conductive composites were measured using the circuit shown in Figure 1. A standard resistance is connected in series with the sample and a current is passed through the series circuit. Since the voltage drop across each resistor is proportional to its resistance, the resistance of the sample can be determined by comparing the voltage drop across it with that across a known resistor.
Hands, Rubber Chern. , 50, p. 480 (1977). R. B. Cowde11, IEEE Trans. E1ec. , EMC-10, p. 158 (1968). R. H. Perry, C. H. Chilton, S. D. Kirkpatrick, "Chemical Engineers' Handbook", Fourth Edition, p. 12-34, McGraw-Hill, New York (1963). A. P. Conroy, D. L. Skinner, P1ast. , 33, p. 28 (Aug. 1977). G. Landon, G. Lewis, G. F. Boden, J. Mater. , 12, p. 1605 (1977) . E. O. Box 196 San Ramon, California 94583 INTRODUCTION Only a few short years ago, plastics were best known for their insulating properties and great strides were made in electronics, in electrical equipment and electrical component design as the dielectric strength of plastics was improved.