Patents – Alan G. MacDiarmid
(1994 - 2012)

MacDiarmid Page · Resources with Additional Information · Patents (1980 - 1992)


US 5,276,112 HIGH MOLECULAR WEIGHT POLYANILINES AND SYNTHETIC METHODS THEREFOR – MacDiarmid, Alan G.; et. al.; January 4, 1994
High molecular weight polyanilines are provided, along with synthetic methods therefor. The methods generally comprise mixing aniline, protonic acid, salt, and a polymerization agent at a temperature of from about -10.degree. C. to about -70.degree. C. Upon analysis by gel permeation chromatography, using polystyrene standards, the polyanilines of the invention provide a single peak, weight average molecular weight greater than about 200,000.

US 5,403,913 METHODS FOR PREPARING CONDUCTIVE POLYANILINES – MacDiarmid, Alan G.; et. al; April 4, 1995
Methods for preparing conductive polyaniline forms are provided in which the conductivity of the polyaniline form can be substantially increased by contacting the polyaniline form with a phenolic compound that acts as a secondary dopant for the polyaniline. Generally, a doped polyaniline solution is prepared in which the polyaniline is initially doped by a protonic acid and a doped polyaniline form is then prepared from this solution. The polyaniline form can then be contacted with the phenolic compound in either its vapor or liquid state, however it is preferred that the polyaniline form be maintained in either the gelatinous or solid state during the contacting step. The conductivity of the polyaniline form can be raised by a factor of up to about 500-1000.

US 5,519,111  HIGH MOLECULAR WEIGHT POLYANILINES AND SYNTHETIC METHODS THEREFOR – MacDiarmid, Alan G.; et. al.; May 21, 1996
High molecular weight polyanilines are provided, alone with synthetic methods therefor. The methods generally comprise mixing aniline, protonic acid, salt, and a polymerization agent at the desired reaction temperature. The presence or the salt increases the molecular weight of the polyaniline produced. The reaction temperature is preferably maintained at lower temperatures to also increase the molecular weight of the polyaniline.

US 5,645,890 PREVENTION OF CORROSION WITH POLYANILINE – MacDiarmid, Alan G.; et. al.; July 8, 1997
Methods for improving the corrosion inhibition of a metal or metal alloy substrate surface are provided wherein the substrate surface is coated with a polyaniline film. The polyaniline film coating is applied by contacting the substrate surface with a solution of polyaniline. The polyaniline is dissolved in an appropriate organic solvent and the solvent is allowed to evaporate from the substrate surface yielding the polyaniline film coating.

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US 5,773,568 METHODS FOR PREPARING CONDUCTIVE POLYANILINES – MacDiarmid, Alan G.; et. al.; June 30, 1998
Methods for preparing conductive polyaniline forms are provided in which the conductivity of the polyaniline form can be substantially increased by contacting the polyaniline form with a phenolic compound that acts as a secondary dopant for the polyaniline. Generally, a doped polyaniline solution is prepared in which the polyaniline is initially doped by a protonic acid and a doped polyaniline form is then prepared from this solution. The polyaniline form can then be contacted with the phenolic compound in either its vapor or liquid state, however it is preferred that the polyaniline form be maintained in either the gelatinous or solid state during the contacting step. The conductivity of the polyanine form can be raised by a factor of up to about 500-1000.

US 6,090,985 CHIRAL POLYANILINES AND THE SYNTHESIS THEREOF – MacDiarmid, Alan G.; et. al.; July 18, 2000
The present invention generally describes novel chiral polyanilines in their doped (protonated) forms and novel methods for their chemical synthesis comprising polymerizing an aniline monomer in the presence of a chiral dopant acid, an oxidizing agent, and, optionally, a substrate, and their conversion by treatment with a base to novel chiral polyanilines in their de-doped base forms. The novel chiral polyanilines of the present invention may be used as electrodes for asymmetric synthesis, as biological sensors and as separation materials in pharmaceutical applications.

US 6,160,177 OLIGOMERIC ANILINES AND THEIR SYNTHESIS – MacDiarmid, Alan G.; et. al.; December 12, 2000
Oligomeric anilines (I; n=2, 4), useful in sensors for volatile organic compounds, in corrosion-resistant coatings for metals and metal alloys, and in applications which use electroactive materials, are prepared. Thus, tetraaniline in the emeraldine oxidation. state (n=1) was prepared by the ferric chloride-promoted oxidative coupling of N-phenyl-1,4-phenylenediamine HCl salt and recrystallizing the reaction mixture from PhMe, and next converted to tetraaniline in the leucoemeraldine oxidation state by treatment with hydrazine. Tetraaniline in the leucoemeraldine oxidation state was then contacted with an oxidative coupling agent (e.g., ammonium peroxydisulfate) to produce aniline oligomers I (n=2 and 4).

US 7,264,762 ELECTROSPINNING ULTRAFINE CONDUCTIVE POLYMERIC FIBERS – MacDiarmid, Alan G.; September 4, 2007
A process of making conductive polymeric fibers by electrospinning fibers from a blend of polymers dissolved in an organic solvent includes generating a high voltage electric field between oppositely charged polymer fluid in a glass syringe (4) with a capillary tip (5) and a metallic collection screen (2) and causing a polymer jet (3) to flow to the screen (2) as solvent evaporates and collecting fibers on the screen (2)..

US 8,096,119 FUEL-POWERED ACTUATORS AND METHODS OF USING SAME – MacDiarmid, Alan G.; et. al.; January 17, 2012 
Fuel-powered actuators are described wherein actuation is a consequence of electrochemical processes, chemical processes, or combinations thereof. These fuel-powered actuators include artificial muscles and actuators in which actuation is non-mechanical. The actuators range from large actuators to microscopic and nanoscale devices.


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