Film/coating formation effects

In view of its practical importance, it is surprising that there has been relatively little detailed study of this form of transfer, even to the extent of defining the rate of formation of a transfer film, or the effects of such factors as counterface material, hardness and surface finish. The general design assumptions tend to be based on the requirements for transfer from composites, namely a surface roughness of 0.2 fjm C.L.A., and the possible use of a soft plating or a chemical conversion coating on the counterface. 

The electrolytic oxidation was found to proceed much faster in the presence of Cu-pyridine as a redox mediator in the electrolytic cell divided with a membrane. The electrode coated with Cu/poly(4-vinylpyridine) was also effective for the oxidative polymerization, and what was more, without a partition membrane (Figure 8). Polymer-Cu complex film coated on the electrode prevented formation of the insulating film of the product polymer on the electrode surface and decreased the electrolytic potential. The oxidation using the electrode coated with a macromolecular Cu complex provides a facile method for forming poly(phenylene oxide)s. 

The polymer/metal particle composites have been synthesized by utilizing fine metal surfaces as effective initiation sites for radical polymerization of vaporized vinyl monomers. On the metal surfaces, GASP of vinyl monomers is initiated and induces the formation of polymer thin-film coatings of the fine metal particles. Andou et al. demonstrated that GASP of MMA on a zero-valent iron (Fe(0))... 

There is not enough space here to give a detailed classification, but only to delineate the major families from which resins for industrial coatings may be selected. Resins may be divided into two groups according to their modes of film formation which may or may not involve a chemical reaction. In the first, the components must react together to form a crosslinked structure which may require heat, radiation or catalysis to effect the reaction. The bulk of resins used in industrial finishes are of this type. They are commonly referred to as chemically convertible or, simply, convertible. 

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