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Stable, concentrated solutions of polyaniline using amines as gel inhibitors

Patent ·
OSTI ID:874636
 [1];  [2]
  1. Los Alamos, NM
  2. Tesuque, NM
+ Show Author Affiliations

Stable, concentrated solutions of high-molecular weight polyaniline using amines as gel inhibitors. Certain amine compounds (gel inhibitors) are used to form highly concentrated, stable solutions of the emeraldine base form of polyaniline in numerous organic solvents from which coatings, films and fibers are readily prepared without problems associated with rapid gelation which occurs when concentrated solutions are attempted without the use of the gel inhibitors of the present invention. Tertiary amines are used to solubilize low-molecular weight fractions (M.sub.w <120,000, M.sub.n <30,000) of the pernigraniline, emeraldine, and leucoemeraldine oxidation states of polyaniline as concentrated (>20 wt. %) polyaniline solutions, while primary and secondary amines are used to produce solutions having 15-40 wt % of high-molecular weight polyaniline [M.sub.w.gtoreq.120,000, M.sub.n.gtoreq.30,000]. Concentrated solutions of polyaniline co-polymers or ring and/or nitrogen-substituted polyanilines may also be prepared.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
The Regents of the University of California (Los Alamos, NM)
Patent Number(s):
US 6429282
OSTI ID:
874636
Country of Publication:
United States
Language:
English

References (8)

Conductivity Relaxation of 1-Methyl-2-pyrrolidone-Plasticized Polyaniline Film journal November 1995
Towards optimization of electrical and mechanical properties of polyaniline: Is crosslinking between chains the key? journal March 1993
Polyaniline: Dependency of selected properties on molecular weight journal March 1993
Concurrent reduction and modification of polyaniline emeraldine base with pyrrolidine and other nucleophiles journal January 1997
Improved solution stability and spinnability of concentrated polyaniline solutions using N,N′-dimethyl propylene urea as the spin bath solvent journal March 1995
Polyaniline spinning solutions and fibers journal June 1993
Polyaniline: Synthesis and Characterization of the Emeraldine Oxidation State by Elemental Analysis book January 1987
LiCl Induced Morphological Changes in Polyaniline Base and Their Effect on the Electronic Properties of the Doped Form journal January 1996

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Related Subjects

/528/252/524/
15-40
&lt;120000
&lt;30000
&gt;20
amine
amines
andor
associated
attempted
base
co-polymers
coatings
compounds
concentrated
concentrated solution
emeraldine
fibers
films
form
fractions
gelation
high-molecular
highly
inhibitors
leucoemeraldine
low-molecular
molecular weight
msubn
msubngtoreq30000
msubw
msubwgtoreq120000
nitrogen-substituted
numerous
occurs
organic
organic solvent
oxidation
pernigraniline
polyaniline
polyanilines
prepared
primary
produce
rapid
readily
secondary
solubilize
solutions
solvents
stable
tertiary
tertiary amine
weight
weight polyaniline
wt