Polymer continued metal-containing

Accordion polymers—Continued orientational and chemical stability, 139 synthesis by Knoevenagel condensation polymerization, 135-136 waveguide construction, 139-140 Aluminum metal electrode, deposition on polymer in LED, 411,412/ Aromatic amine-containing polymers dye-dispersed poly(N-vinylcarbazole), 387, 390-393... 

The difficulty of assembling metal-containing polymers has been and continues to be a synthetic challenge. The process of attempting to prepare these polymers has led to a number of novel preparative routes. 

Coordination polymers are one of the earliest developed classes of metal-containing polymers. They continue to attract a great deal of attention because of their widespread applications. Coordination complexes of platinum, for example, were prepared as potential biologically active agents by the reaction of K2PtCl4 with pyrimidines, purines, hydrazines, and diamines. Polymer 1, for example, represses the rephcation of poliovirus I and l-RNA virus at a 10-20- ig/mL level. 

In order to make the potential of iron more negative, the iron must receive a continuous supply of electrons. As has already been pointed out, polymer films do not contain free electrons there remains the possibility of obtaining these from a pigment. The only pigments which contain free electrons are metallic ones, and such pigments will protect iron cathodically if the following conditions are fulfilled ... 

For detailed characterization and extensive studies of reactivity, multi-gram quantities are still needed and large-scale metal vapor synthetic routes are necessary. The equipment required for this is well-documented (4) and so will not be described in detail here. The principles are those of the Fluid Matrix Technique except that in order to accommodate 10-100 gram of polymer, the coreactant is contained within a rotating flask which serves to provide a continuously renewed film as metal atoms are produced under high vacuum. 

As noted earlier, for the most part, the resulting materials from the use of reinforcements are composites, which are materials that contain strong fibers embedded in a continuous phase. The fibers are called reinforcement and the continuous phase is called the matrix. While the continuous phase can be a metallic alloy or inorganic material, it is typically an organic polymer that is termed a resin. Composites can be fabricated into almost any shape and after hardening, they can be machined, painted, etc., as desired. 

---