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Title: 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 (United States)
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)

Towards optimization of electrical and mechanical properties of polyaniline: Is crosslinking between chains the key? journal March 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
Polyaniline spinning solutions and fibers journal June 1993
Conductivity Relaxation of 1-Methyl-2-pyrrolidone-Plasticized Polyaniline Film journal November 1995
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

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Related Subjects

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