Conditions for Reticulated Crystalline Doping of Polymer with Charge Transfer Complexes

-Polymers are usually dielectrics. The specific chemical constitution of polymer chains makes it possible to obtain semiconducting systems which after suitable doping in the solid state can be transformed into systems which exhibit high electric conductivity eg. polyacetylenes. However these interesting materials are unstable in ambient conditions.Taking into consideration the basic knowledge of highly conducting CT complexes of low molecular weight compounds -organic metals -a new class of conducting polymeric materials has been obtained with a correlated network of crystalline, conducting CT complexes grown in different innert polymers. These systems exhibit a high conductivity in the dark at a concentration of additives as low as 1 wt% and are very stable in ambient conditions. The preparation, structure, and the electrical and mechanical properties of these systems are discussed and compared with those obtained when low molecular weight CT complexes are molecularly dispered in polymers leading only to enhanced photoconductivity. These new system are also compared with the mixtures obtained using CT complexes and polymers which exhibit high conductivity only when the concentration of additives is of the order of 30 wt% which leads to an important change of all properties of the system. The discoverd highly conducting systems open a new field in polymer science and organic solid state physics because a variety of CT compexes and polymer matrices can be used and various isotropic and anisotropic systems can be obtained. Studies on these materials will shed light on the basic problems of charge transport in such systems and will lead to novel materials with possible practical applications showing the importance and specific properties of organized molecular assemblies in polymer matrices. INTRODUCTI ONMany polymers exhibit some properties characteristic of metals. These include good strength, elasticity, frictional resistance, toughness, etc. and because of the ease of preparation and processing and low density, such polymers have long replaced metals in many applications. Only the most important property of metals, electrical conduction, was not obtained in polymers until very recently. Attempts to prepare polymers which exhibit high electrical conductivity have been made by many academic and industrial centers. The significance of this question is clear because one would like to process such materials in the form of films or fibers using well known technologies of the plastics industry. Numerous studies carried out by chemists and physicists have lead to the preparation and characteristics of macromolecular materials which exhibit semiconducting properties. From monographs (Ref.1-3) and review articles which are quoted here only as an example it can be gleaned that ideas related to the relationship between molecular constitution and physical structure of macromolecular solids are not fully developed, although much basic knowledge has been acquired. Macromolecules with an extended 11-electron system w...

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“…More detailed experimental information can be found in other papers on this subject (Ref. [18][19][20][21][22][23][24].…”

Section: Conducting Polymers With Crystalline Network Of Strong Ct Comentioning

confidence: 99%

Structure and electrical properties of polymers with amorphous and crystalline dopants

Κryszewski¹,

Jeszka²,

Ulański³

et al. 1984

Pure and Applied Chemistry

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“…Since the discovery of electrically conductive polymers in 1977 (4). extensive researches have been conducted in this area (5)(6)(7)(8)(9). As a result, electrically conductive composite materials have become an important class of material with wide applications in antistatic/charge dissipative materials, conducting adhesives, and electromagnetic shielding in electronic equipment (10)(11)(12)(13)(14)(15).…”

Section: Introductionmentioning

confidence: 99%

“…16, No. 5 corrosion resistance, melting point, thermal conductivity, and, in this case, electrical conductivity. Fiberglass pipe has a much lower density and has better corrosion resistance characteristics than currently used alloy pipe.…”

Section: Introductionmentioning

confidence: 99%

Development of an electrically conductive fiber reinforced plastic pipe

Pang

Beek²,

Lea³

1995

Polymer Composites

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Baton Rouge, LouisianaFiber-reinforced plastic (FW) pipe has much lower density and better corrosion resistance characteristics than currently used alloy pipe, but it generally does not conduct electricity as well as steel pipe. In this study, an FRP pipe was made conductive by doping the inner liner vinyl ester resin with milled carbon fibers. The joints were also made conductive using the same resin, thus allowing the pipe to be electrically grounded. The result was a pipe having a surface resistivity of less than 125 a/ 0 using current manufacturing processes.

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