US4935181A
Expired / Lapsed
US
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Process of making oriented films of conductive polymers
Assignee: TRUSTEES OF UNIVERSITY OF PENNSYLVANIA A NON-PROFIT CORP OF
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Filing: 1989-02-03
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Granted: 1990-06-19
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Expires: 2009-02-03
Abstract
Abstract Methods for preparing highly conductive, oriented polymers are disclosed. In the preferred embodiment, solution of conductive polymer is cast onto the surface of a stretchable support material, and oriented polymer is produced by removing solvent from the solution and stretching the support material. The invention is particularly useful for preparing oriented films of polyaniline which films have been shown to exhibit conductivities in the range of 300-2500 S/cm.
Inventors
- 👤 Nicolas Theophilou
- 👤 Sanjeev Manohar
- 👤 Elliot Scherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01; B29C; B29C39/00; B29C39/02; B29C55/00; B29C55/005; B29C55/02; B29C55/023; B29C55/026; B29K; B29K2086/00; B29K2995/00; B29K2995/0003; B29K2995/0005; B29K2995/0037; B29K2995/005; B29L; B29L2007/00; B29L2007/008
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
84 words
A method of producing an oriented conductive polymer, said conductive polymer being any conjugated polymer which is dopable with an ionic dopant species to a more highly electrically conducting state, which method comprises (a) providing a solution of said conjugated polymer; (b) casting said solution onto a stretchable support material; (c) removing solvent from said solution and stretching said support under conditions effective to produce said oriented polymer; and (d) during or after step (c), doping said conjugated polymer to render the polymer conductive.
Claim 2
Independent Claim
84 words
A method of producing an oriented conductive polymer, said conductive polymer being any conjugated polymer which is dopable with an ionic dopant species to a more highly electrically conducting state, which method comprises (a) providing a solution of said conjugated polymer; (b) casting said solution onto a stretchable support material; (c) removing solvent from said solution and stretching said support under conditions effective to produce said oriented polymer; and (d) during or after step (c), doping said conjugated polymer to render the polymer conductive.
Claim 3
Dependent Claim
22 words
The method of claim 1 where said oriented polymer is in the form selected from the group consisting of films and fibrils.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein, prior to commencing stretching, sufficient solvent is removed from said polymer solution to convert said solution into a consolidated structure.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein removal of said solvent and stretching of said support occur simultaneously.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said stretchable support material is a polymeric material.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said stretchable support material is a conductive polymer film.
Claim 8
Dependent Claim
28 words
The method of claim 5 wherein said stretchable support material is selected from the group consisting of low and high density polyethylene, polypropylene, polytetrafluoroethylene, polyacetylene, polyaniline and polypyrrole.
Claim 9
Dependent Claim
38 words
The method of claim 1 wherein said solvent is removed from said solution by exposing said solution to a temperature within the range bounded by the glass transition temperature and the crystalline melting point of the conductive polymer.
Claim 10
Dependent Claim
20 words
The method of claim 1 wherein, following step (c), said oriented polymer is subjected to annealing conditions to increase crystallinity.
Claim 11
Dependent Claim
38 words
The method of claim 9 wherein said annealing conditions comprise heating said oriented polymer to a temperature above its glass transition temperature and below its crystalline melting point for a period of about 5 minutes to 2 hours.
Claim 12
Dependent Claim
11 words
The method of claim 1 wherein said conductive polymer is polyaniline.
Claim 13
Dependent Claim
15 words
The method of claim 11 wherein said polyaniline film is stretched up to about 300%.
Claim 14
Independent Claim
101 words
A method of producing an oriented, conductive polymer, said conductive polymer being any conjugated polymer which is dopable with an ionic dopant species to a more highly electrically conducting state, which method comprises (a) providing a solution of monomer polymerizable to said conductive polymer in the presence of an appropriate catalyst; (b) providing a stretchable support material; (c) exposing said solution of monomer to said stretchable support in the presence of an effective catalytic amount of said appropriate catalyst; (d) removing polymer and support from said solution and stretching said polymer and support under conditions effective to produce said oriented polymer.
Claim 15
Independent Claim
101 words
A method of producing an oriented, conductive polymer, said conductive polymer being any conjugated polymer which is dopable with an ionic dopant species to a more highly electrically conducting state, which method comprises (a) providing a solution of monomer polymerizable to said conductive polymer in the presence of an appropriate catalyst; (b) providing a stretchable support material; (c) exposing said solution of monomer to said stretchable support in the presence of an effective catalytic amount of said appropriate catalyst; (d) removing polymer and support from said solution and stretching said polymer and support under conditions effective to produce said oriented polymer.
Claim 16
Dependent Claim
22 words
The method of claim 13 where said oriented polymer is in the form selected from the group consisting of films and fibrils.
Claim 17
Dependent Claim
21 words
The method of claim 13 wherein removal of solvent from the solution and stretching of said polymer and support occur simultaneously.
Claim 18
Dependent Claim
14 words
The method of claim 13 wherein said stretchable support material is a polymeric material.
Claim 19
Dependent Claim
15 words
The method of claim 16 wherein said stretchable support material is a conductive polymer film.
Claim 20
Dependent Claim
28 words
The method of claim 16 wherein said stretchable support material is selected from the group consisting of low and high density polyethylene, polypropylene, polytetrafluoroethylene, polyacetylene, polyaniline and polypyrrole.
Claim 21
Dependent Claim
38 words
The method of claim 14 wherein said solvent is removed from said solution by exposing said solution to a temperature within the range bounded by the glass transition temperature and the crystalline melting point of the conductive polymer.
Claim 22
Dependent Claim
20 words
The method of claim 14 wherein, following step (d), said oriented polymer is subjected to annealing conditions to increase crystallinity.
Claim 23
Dependent Claim
38 words
The method of claim 20 wherein said annealing conditions comprise heating said oriented polymer to a temperature above its glass transition temperature and below its crystalline melting point for a period of about 5 minutes to 2 hours.
Claim 24
Dependent Claim
11 words
The method of claim 14 wherein said conductive polymer is polyaniline.
Claim 25
Dependent Claim
14 words
The method of claim 22 wherein said polyaniline is stretched up to about 300%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |