Electromagnetic radiation absorbers and modulators comprising po

Details Electromagnetic radiation absorbers and modulators comprising po Electromagnetic radiation absorbers and modulators comprising po

1995-06-07

1996-10-08

Chapman, Mark

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C08J 328

Patent

active

055631827

ABSTRACT:
A method of providing electronic shielding comprising providing a layer of a polyaniline composition on the object to be shielded, whereby the entrance and egress of electromagnetic radiation is prevented. Also presented herein is a method of changing the absorption by a polyaniline composition of electromagnetic radiation by modifying the chemical structure and crystallinographic order of the polyaniline composition, wherein said composition comprises a composition of the formula ##STR1## where y can be equal to or greater than zero, and R.sup.1 and R.sup.2 are independently selected from the group consisting of --H, --OCH.sub.3, --F, --Cl, --Br, --I, --NR.sup.3.sub.2, --NHCOR.sup.3, --OH, --O, --SR.sup.3, --OR.sup.3, --OCOR.sup.3, --NO.sub.2, --COOH, --COOR.sup.3, --R.sup.3 SO.sub.3 H, --COR.sup.3, --CHO, and --CN, where R.sup.3 is a C.sub.1 to C.sub.8 alkyl, aryl, or aralkyl group.

REFERENCES:
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patent: 5079344 (1992-01-01), Epstein et al.
Pouget et al., "X-ray Structure of Polyaniline", Macromolecules, vol. 24, 1991, pp. 779-789.
Epstein et al., "The Metallic State of Conducting Polymers: Microwave Dielectric Response and Optical Conductivity", Proceedings of the MRS Fall 1993 Symposium, Boston, MA, 29 Nov., 1993, in press.
Laridjani et al., "Amorphography--The Relationship between Amorphous and Crystalline Order. 1. The Structural Origin of Memory Effects in Polyaniline", Macromolecules, vol. 25, 1992, pp. 4106-4113.
Epstein et al., "Polanilines: Recent Advances In Processing And Applications To Welding Of Plastics", in M. Aldissi (ed.), Intrinsically Conducting Polymers: An Emerging Technology, Kluwer Academic Publishers, Netherlands, 1993, pp. 165-178.
Joo et al., "Microwave Dielectric Response of `Mesoscopic` Metallic Regions and Intrinsic Metallic State of Polyaniline", Physical Review B, Rapid Communication, Jan. 15, 1994.
Yue et al., "Effect of Sulfonic Acid Group on Polyaniline Backbone", JACS, vol. 113, 1991, pp. 2665-2671.
MacDiarmid et al., Conducting Polymers: Science and Technology, Second Brazillian Polymer Conference, Sau Paulo, Brazil, 5-8 Oct. 1993.

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