GB979122A - Method of producing semiconductive polymer materials - Google Patents
Method of producing semiconductive polymer materialsInfo
- Publication number
- GB979122A GB979122A GB1542261A GB1542261A GB979122A GB 979122 A GB979122 A GB 979122A GB 1542261 A GB1542261 A GB 1542261A GB 1542261 A GB1542261 A GB 1542261A GB 979122 A GB979122 A GB 979122A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- treatment
- heat
- fibres
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inorganic Fibers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Artificial Filaments (AREA)
Abstract
Materials having semi-conducting properties are made by a two-stage heat-treatment of previously stretched polyacrylonitrile fibres or fabrics made therefrom, the first stage being carried out at substantially 200 DEG C. and the second stage at 500-1100 DEG C., the process resulting in carbon fibres. Preliminary stretching may be in the range 10-25 times. Preferably polyacrylonitrile having an average molecular weight of not less than 10,000, the fibres having a metric worsted number in the range 6000-7000, is used. Metric worsted number= number of 1000 m. lengths in 1000 gms. Fabrics used should have a weave ensuring free shrinkage. At least one stage of the heat-treatment may be carried out in air, in an atmosphere of inert gas, or a gas or vapour containing free or combined nitrogen, e.g. ammonia, at atmospheric or superatmospheric pressures, or in vacuo, or in a vaporized hydrocarbon medium (e.g. paraffin) or in powdered carbon as a heat transfer medium, and an absorbent medium for vapours evolved. The two stages may be effected in the same medium or in different media. In examples, first stage heat treatment is for 20 hours at 200 DEG C. and that of second stage heat-treatment varies from 20 minutes to 1 hour at from 500-1100 DEG C. Materials so made have electrical conductivities ranging from 10-6 mho./cm. to 102 mho./cm. and the weight of the treated material is 40-70% of the initial weight.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1542261A GB979122A (en) | 1961-04-28 | 1961-04-28 | Method of producing semiconductive polymer materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1542261A GB979122A (en) | 1961-04-28 | 1961-04-28 | Method of producing semiconductive polymer materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB979122A true GB979122A (en) | 1965-01-01 |
Family
ID=10058858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1542261A Expired GB979122A (en) | 1961-04-28 | 1961-04-28 | Method of producing semiconductive polymer materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB979122A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990000634A2 (en) * | 1988-07-07 | 1990-01-25 | E.I. Du Pont De Nemours And Company | Metallized polymers and method |
US5399425A (en) * | 1988-07-07 | 1995-03-21 | E. I. Du Pont De Nemours And Company | Metallized polymers |
-
1961
- 1961-04-28 GB GB1542261A patent/GB979122A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990000634A2 (en) * | 1988-07-07 | 1990-01-25 | E.I. Du Pont De Nemours And Company | Metallized polymers and method |
WO1990000634A3 (en) * | 1988-07-07 | 1990-05-03 | Du Pont | Metallized polymers and method |
US5399425A (en) * | 1988-07-07 | 1995-03-21 | E. I. Du Pont De Nemours And Company | Metallized polymers |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2308590B1 (en) | ||
BR8506728A (en) | MATERIAL AND ITEMS CONTROLLABLE BY HEAT | |
GB1220482A (en) | Shaped carbon articles | |
US3697345A (en) | Process for preparing polyimide laminates | |
ES368064A1 (en) | Process for treating the surface of a stretched film | |
GB965622A (en) | Process for preparing carbon fibres | |
GB979122A (en) | Method of producing semiconductive polymer materials | |
US2260746A (en) | Method of treating carbon or graphite | |
Vondráček et al. | Slow decomposition of silicone rubber | |
US4356301A (en) | Polyacetylene with anthraquinone system | |
JPS5610428A (en) | Manufacture of moldings by acetylene high polymer | |
GB1398417A (en) | Process for carbonizing cellulosic material | |
KR870010492A (en) | Magnetic recording medium and its manufacturing method | |
GB852360A (en) | Improvements in or relating to polymeric materials | |
Bullock | Radiation-enhanced oxidation of PAN-based carbon fibres | |
Akamatu et al. | Sulfur-bridged polycyclic aromatic compounds | |
GB977646A (en) | Polymers of butene | |
GB932387A (en) | Carbon articles | |
FR2043229A5 (en) | Carbon filaments prod from - polyacrylonitrile | |
JPS5753324A (en) | Preparation of acetylene high polymer molding having electrical anisotropy | |
US4446310A (en) | Polyacetylene with pyrogallol or hydrosulfite system | |
GB968590A (en) | Process for the manufacture of very pure crystalline carbides, nitrides or borides | |
Hook et al. | Radiation crosslinking of polymeric electrical insulation | |
GB1010898A (en) | Method of treating a porous, high silica content glass | |
GB1297670A (en) |