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Title: Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom

Abstract

Stable, concentrated solutions of high molecular weight polyaniline. In order to process high quality fibers and other articles possessing good mechanical properties, it is known that solution concentrations of the chosen polymer should be in the range from 15-30% (w/w). Moreover, it is desirable to use the highest molecular weight consistent with the solubility properties of the polymer. However, such solutions are inherently unstable, forming gels before processing can be achieved. The present invention describes the addition gel inhibitors (GIs) to the polymer solution, thereby permitting high concentrations (between 15% and 30% (w/w)) of high molecular weight ((M.sub.w)>120,000, and (M.sub.n)>30,000) emeraldine base (EB) polyaniline to be dissolved. Secondary amines have been used for this purpose in concentrations which are small compared to those which might otherwise be used in a cosolvent role therefor. The resulting solutions are useful for generating excellent fibers, films, coatings and other objects, since the solutions are stable for significant time periods, and the GIs are present in too small concentrations to cause polymer deterioration. It is demonstrated that the GIs found to be useful do not act as cosolvents, and that gelation times of the solutions are directly proportional to the concentration of GI. Inmore » particular, there is a preferred concentration of GI, which if exceeded causes structural and electrical conductivity degradation of resulting articles. Heating of the solutions significantly improves solubility.« less

Inventors:
 [1];  [2]
  1. (Santa Fe, NM)
  2. (Los Alamos, NM)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
872653
Patent Number(s):
US 5981695
Application Number:
08/926338
Assignee:
Regents of University of California (Los Alamos, NM) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
stable; concentrated; solutions; molecular; weight; polyaniline; articles; therefrom; process; quality; fibers; possessing; mechanical; properties; solution; concentrations; chosen; polymer; range; 15-30; moreover; desirable; consistent; solubility; inherently; unstable; forming; gels; processing; achieved; describes; addition; inhibitors; gis; permitting; 15; 30; 120; 000; emeraldine; base; dissolved; secondary; amines; purpose; compared; otherwise; cosolvent; role; resulting; useful; generating; excellent; films; coatings; significant; time; periods; deterioration; demonstrated; found; cosolvents; gelation; times; directly; proportional; concentration; particular; preferred; exceeded; causes; structural; electrical; conductivity; degradation; heating; significantly; improves; weight polyaniline; articles therefrom; concentrated solution; concentrated solutions; resulting solution; significantly improves; solution concentrations; molecular weight; time period; mechanical properties; electrical conductivity; directly proportional; polymer solution; time periods; quality fibers; resulting solutions; significant time; resulting articles; resulting article; secondary amines; solubility properties; solutions significantly; weight poly; weight consistent; articles possessing; polymer deterioration; preferred concentration; causes structural; chosen polymer; gelation times; emeraldine base; exceeded causes; excellent fibers; generating excellent; gis found; cosolvent role; conductivity degradation; improves solubility; inherently unstable; forming gels; significantly improve; secondary amine; solution concentration; /528/252/

Citation Formats

Mattes, Benjamin R., and Wang, Hsing-Lin. Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom. United States: N. p., 1999. Web.
Mattes, Benjamin R., & Wang, Hsing-Lin. Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom. United States.
Mattes, Benjamin R., and Wang, Hsing-Lin. Tue . "Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom". United States. https://www.osti.gov/servlets/purl/872653.
@article{osti_872653,
title = {Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom},
author = {Mattes, Benjamin R. and Wang, Hsing-Lin},
abstractNote = {Stable, concentrated solutions of high molecular weight polyaniline. In order to process high quality fibers and other articles possessing good mechanical properties, it is known that solution concentrations of the chosen polymer should be in the range from 15-30% (w/w). Moreover, it is desirable to use the highest molecular weight consistent with the solubility properties of the polymer. However, such solutions are inherently unstable, forming gels before processing can be achieved. The present invention describes the addition gel inhibitors (GIs) to the polymer solution, thereby permitting high concentrations (between 15% and 30% (w/w)) of high molecular weight ((M.sub.w)>120,000, and (M.sub.n)>30,000) emeraldine base (EB) polyaniline to be dissolved. Secondary amines have been used for this purpose in concentrations which are small compared to those which might otherwise be used in a cosolvent role therefor. The resulting solutions are useful for generating excellent fibers, films, coatings and other objects, since the solutions are stable for significant time periods, and the GIs are present in too small concentrations to cause polymer deterioration. It is demonstrated that the GIs found to be useful do not act as cosolvents, and that gelation times of the solutions are directly proportional to the concentration of GI. In particular, there is a preferred concentration of GI, which if exceeded causes structural and electrical conductivity degradation of resulting articles. Heating of the solutions significantly improves solubility.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 09 00:00:00 EST 1999},
month = {Tue Nov 09 00:00:00 EST 1999}
}

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