[article]
| Titre : |
Conductive polymers |
| Type de document : |
texte imprimé |
| Auteurs : |
Paresh Narendra Darshani, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 85-91 |
| Langues : |
Anglais (eng) |
| Catégories : |
Anticorrosion
Antistatiques
Conducteurs organiques
Polyacétylène
Polyaniline
Polymères -- Propriétés électriques
Polymères -- Synthèse
Polymères en médecine
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Polymers (or plastics as they are also called) are known to have good insulating properties. Polymers are one of the most used materials in the modem world. Their uses and application range from containers to clothing. They are used to coat metal wires to prevent electric shocks.
This very narrow perspective is rapidly changing as a new class of Polymer known as Intrinsically conductive polymer or Electroactive polymers are being discovered.
The main class of polymers under these categories are:
. Polyacetylene
. Polyaniline
. Polypyrrole
Insulators, however, have tightly bound electrons so that nearly no electron flow occurs so they offer high resistance to charge flow. So for conductance free electrons are necessary.
In becoming electrically conductive, a polymer has to imitate a metal, that is, its electrons need to be free to move and not bound to the atoms. Polyacetylene is the simplest possible con jugated polymer. It is obtained by polymerisation of Acetylene.
Polymers may also have conductivities corresponding to those of semiconductors.
The conductivity of conductive polymers decreases with decreasing temperature in contrast to the conductivities of metals Conductive polymers have many uses like
. Anti-static substances for photographic film
. Corrosion Inhibitors
. Compact Capacitors
. Anti Static Coating
. Electromagnetic shielding for computers, "Smart Windows"
. Solar Cells |
| Note de contenu : |
- INTRODUCTION : Conducting polymers- polymers which conduct electricity - Literature review (history)
- TYPES OF CONDUCTING POLYMERS : Band gap theory - Forbidden gap - Types of semiconductors
- HOW CAN POLYMER BECOME CONDUCTIVE ? : Conditions to make polymer conducting - Doping process
- SYNTHESIS AND PROCESSING OF CONDUCTING POLYMERS : Table 1 : List of conducting polymers, structure, their dopants and conductivities - Synthesis of polyacetylene - Synthesis of polyaniline (PANI) - Factors which affect conductivity of polymer - Applications - Electrical applications - Medical applications - Anti-static coatings - Corrosion resistance - Some other applications - Future prospects |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18847 |
in PAINTINDIA > Vol. LXIII, N° 2 (02/2013) . - p. 85-91
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Conductive polymers in PAINTINDIA, Vol. LXIII, N° 2 (02/2013)
