Polymer, chemical physics polymeric dispersions properties

The most desirable properties for electrically conductive polymeric materials are film-forming ability and thermal and electrical properties. These properties are conveniently attained by chemical modification of polymers such as polycation-7, 7,8, 8-tetracyanoqninodimethane (TCNQ) radical anion salt formation (1-3). However, a major drawback of such a system is the brittle nature of the films and their poor stability (4,5) resulting from the polymeric ionicity. In recent years, polymeric composites (6-8) comprising TCNQ salt dispersions in non-ionic polymer matrices have been found to have better properties. In addition, the range of conductivities desired can be controlled by adjusting the TCNQ salt concentration, and other physical properties can be modified by choosing an appropriate polymer matrix. Thus, the composite systems are expected to have important advantages for use in electronic devices. 

Polymer nanocomposites are the materials in which inorganic materials of nanosize in at least one dimension are dispersed in the polymer matrix to enhance certain physical and chemical properties of individual components for various applications. Conducting polymer nanocomposites can be synthesized by the incorporation of inorganic nanoparticles into the matrix of a host-conducting polymer either by chemical or by electrochemical polymerization techniques [28]. 

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