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WO1992016950A1 - Procede de preparation d'un polymere conducteur - Google Patents

Procede de preparation d'un polymere conducteur Download PDF

Info

Publication number
WO1992016950A1
WO1992016950A1 PCT/FI1992/000059 FI9200059W WO9216950A1 WO 1992016950 A1 WO1992016950 A1 WO 1992016950A1 FI 9200059 W FI9200059 W FI 9200059W WO 9216950 A1 WO9216950 A1 WO 9216950A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductive polymer
mixture
polymer
ozone
plastic
Prior art date
Application number
PCT/FI1992/000059
Other languages
English (en)
Inventor
Toivo Kärnä
Jukka Laakso
Original Assignee
Neste Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Neste Oy filed Critical Neste Oy
Publication of WO1992016950A1 publication Critical patent/WO1992016950A1/fr

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
    • H01B1/124—Intrinsically conductive polymers
    • H01B1/127—Intrinsically conductive polymers comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes

Definitions

  • the invention is concerned with a method of preparing a conductive polymer by doping of a conductive polymer or a mixture of a matrix plastic and a conductive polymer.
  • the invention is concerned with a method of preparing conductive plastic products by doping of a conductive polymer or a plastic mixture contain ⁇ ing a conductive polymer.
  • the good isolating properties of plastics have in some cases restricted their use, for example because static electricity has been collected in packages prepared of plastic. Static electricity has increased the adhesion of films to each other in the production processes of plastics and thus made the winding properties worse.
  • the package products charged with static electricity can in the use cause situ ⁇ ations of danger for example a risk of explosion. Spiking may cause dangerous situations, especially in solvents to be held in plastic barrels and in other inflam ⁇ mable fluids.
  • Static electricity in package materials also increases the contamination of the packages during storage. In packages with sensitive electronic components it is very important to avoid spiking and forming of static electricity.
  • plastics to be conductive or antistatic Three methods are mainly used for treating plastics to be conductive or antistatic of which one way is to add metallic powder or soot among the isolating and non- conductive plastic to achieve conductivity.
  • the problem with this is that there shall be so much added particles uniformly distributed that they touch each other. In this case also the conductivity curve will have bends, in other words, at low concentrations there is no conductivity and after a given threshold value the conductivity is high.
  • Another possibility to treat plastics to be antistatic is to treat the surface of the plastic product either with corona charging or with given chemicals.
  • the problem with the corona charging is that the effect is maintained only for a short time.
  • the problem with the chemical surface treatment is its dependence on humidity. The surface resistance of a plastic product thus treated depends on the air humidity around the product.
  • the third possibility is to coat the plastic product with a thin metallic layer.
  • the problem with this method is that the product is very brittle, the surface is sensitive and the conductivity curve has bends.
  • the best way is to make the plastic product of a polymer that is conductive in itself or from a mixture of such polymer and a matrix plastic. Then the conduc ⁇ tivity of the product can be exactly controlled in accordance with the wished use either by changing the composition of the polymeric mixture or by altering the doping degree.
  • Polythiophene is one of those polymers that can be made electrically active on the above mentioned way.
  • Polythiophene can be prepared for example by using catalysts of Ziegler-type and acid-inititators.
  • the aim of this invention is a method wherein the doping can be carried out quickly and simply and in a way that saves the environment.
  • the method of the invention is mainly characterized in that the doping is carried out by means of ozone.
  • the doping can be carried out by adding dopant to the conductive polymer in melt state in which case the timing of the doping is made to happen in connec- tion with the working or after that or before the melting of the conductive polymer, in the connection with that or after that.
  • the dopant is added for example to the extruder or after that before the mould pressing.
  • the doping can be carried out in a way according to the invention for example in connection with some melt working method of plastics.
  • Different working methods are for example extrusion, calandering, deepdrawing, coating and injection moulding, press moulding, film blowing etc.
  • the dopant can in a way according to the invention be introduced to the melt mixture either so that it is mixed with the conductive polymer or with the matrix plastic or the dopant can be added directly to the conductive polymer or to a powder or a melt mixture of the conductive polymer and a matrix plastic. Then the mixing of the dopant with the plastic is carried out for example in the extruder before pressing of the product, in which case the doping begins in connection with the melt mixing and continues during the forming of the product and after that.
  • the polymer used can be any polymer that can be doped and worked in melt state for example poly(3-octylthiophene) and the matrix material can be any polymer that can be worked.
  • the invention can be used for preparing a polymer with any possible conductiv ⁇ ity, as it is characteristic for the invention that already small ozone amounts (ca 0,2%) are enough to achieve a degree of conductivity (10 ⁇ 6 - 10 "5 s/cm), which is enough for antistatic applications.
  • the advantage with the invention is that no diffusion of dopant from the material exists. Further advantages are that the doping is quick, it is simple to carry out and the material doped with ozone does not cause any harm for the environment. In addition to that it can be adapted to the process.
  • the doping of the conductive polymer was carried out with the device of figure 1.
  • Oxygen was led from an oxygen bottle 1 via a control valve to ozonizer 3.
  • ozonizer 3 In the gas stream coming from the ozonizer 5-7% was ozone and the rest of it was oxygen.
  • the ozone was lead to a rotatable piston 4, inside which there was conductive polymer in form of powder.
  • the gas stream coming from the piston was lead to a KJ-solution 5, to which the ozone that did not react with the conductive polymer was bound.
  • the amount of the bound ozone to the conductive polymer could be determined.
  • Samples of the conductive polymer was taken from the piston 4 during the test. Tablets were pressed from the samples from which the conductivity was determined.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention se rapporte à un procédé de préparation d'un polymère conducteur, consistant à doper un polymère conducteur, ou un mélange contenant un polymère conducteur et une matrice plastique, avec de l'ozone.
PCT/FI1992/000059 1991-03-14 1992-02-28 Procede de preparation d'un polymere conducteur WO1992016950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI911271 1991-03-14
FI911271A FI89720C (fi) 1991-03-14 1991-03-14 Framstaellningsfoerfarande foer elledande polymer

Publications (1)

Publication Number Publication Date
WO1992016950A1 true WO1992016950A1 (fr) 1992-10-01

Family

ID=8532118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1992/000059 WO1992016950A1 (fr) 1991-03-14 1992-02-28 Procede de preparation d'un polymere conducteur

Country Status (2)

Country Link
FI (1) FI89720C (fr)
WO (1) WO1992016950A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150228902A1 (en) * 2012-09-25 2015-08-13 Merck Patent Gmbh Formulations containing conductive polymers and use thereof in organic electronic devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062211A2 (fr) * 1981-04-02 1982-10-13 Bayer Ag Produits en nappe et fibres contenant des particules de polyacétylène dopées en forme de fibres ou d'aggrégats, et leurs modes de préparation
EP0214506A1 (fr) * 1985-08-29 1987-03-18 Bayer Ag Polymères électriquement conducteurs et procédé pour leur préparation
WO1989001015A1 (fr) * 1987-07-29 1989-02-09 Neste Oy Composites en plastique conducteurs
WO1990009027A1 (fr) * 1989-01-27 1990-08-09 Neste Oy Utilisation de polymeres composites electriquement conducteurs
WO1991015859A1 (fr) * 1990-03-30 1991-10-17 Neste Oy Procede de preparation d'une polymere electroconducteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062211A2 (fr) * 1981-04-02 1982-10-13 Bayer Ag Produits en nappe et fibres contenant des particules de polyacétylène dopées en forme de fibres ou d'aggrégats, et leurs modes de préparation
EP0214506A1 (fr) * 1985-08-29 1987-03-18 Bayer Ag Polymères électriquement conducteurs et procédé pour leur préparation
WO1989001015A1 (fr) * 1987-07-29 1989-02-09 Neste Oy Composites en plastique conducteurs
WO1990009027A1 (fr) * 1989-01-27 1990-08-09 Neste Oy Utilisation de polymeres composites electriquement conducteurs
WO1991015859A1 (fr) * 1990-03-30 1991-10-17 Neste Oy Procede de preparation d'une polymere electroconducteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150228902A1 (en) * 2012-09-25 2015-08-13 Merck Patent Gmbh Formulations containing conductive polymers and use thereof in organic electronic devices
US9972782B2 (en) * 2012-09-25 2018-05-15 Merck Patent Gmbh Formulations containing conductive polymers and use thereof in organic electronic devices

Also Published As

Publication number Publication date
FI911271A0 (fi) 1991-03-14
FI89720C (fi) 1993-11-10
FI89720B (fi) 1993-07-30
FI911271L (fi) 1992-09-15

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