Conductive elastomeric foams by in-situ vapor phase polymerizati

Details Conductive elastomeric foams by in-situ vapor phase polymerizati Conductive elastomeric foams by in-situ vapor phase polymerizati

1998-11-09

2000-12-05

Foelak, Morton

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

521 53, 521 54, 521 841, 521 90, 5211091, 521134, H01B 106, C08J 936

Patent

active

061562351

ABSTRACT:
A conductive elastomeric foam composite is presented, comprising an elastomer foam and polypyrrole, thiophene, or aniline and derivatives thereof. The foam is manufactured by first diffusing an oxidant into the dense polymer phase of a solvent-swollen foam and then diffusing pyrrole or pyrrole derivative vapor or solution into the dried foam, resulting in an in situ chemical oxidative polymerization of pyrrole at the oxidant site. Only about 5 wt % of conductive polymer is required for observing an insulator to conductor transition. The conductivity of the composite foam can be effectively controlled between 10.sup.-7 and 10.sup.-1 S/cm by varying either the amount of oxidant used and/or the copolymer composition.

REFERENCES:
patent: 4136238 (1979-01-01), Hilterhaus et al.
patent: 4731408 (1988-03-01), Jasne
patent: 5415934 (1995-05-01), Mori
patent: 5429772 (1995-07-01), Castellucci et al.
patent: 5431844 (1995-07-01), Nishiwaki
patent: 5686183 (1997-11-01), Nishiwaki

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