The Main Functional Properties of Inhibited Films

The most important functions that are critical for reliable serviceability of inhibited films as anticorrosion means are the following 

Prolonged liberation of immobilized Cl controlled by evaporation and diffusion governs the protective characteristics of the films. Pol3uner films with contact Cl have gained limited application in mainly skin packaging of metal ware [104]. Their anticorrosion properties depend much on the S3meresis intensity of the liquid Cl during which the inhibitor is transported from the pol uner matrix onto the film surface (the physical-chemical bases of this phenomenon have been considered in Sect. 1.4). 

A requisite of high exudation rate of viscous liquid Cl, to which contact inhibitors belong, is the formation of a jellygel-like structure in the polymer matrix with a developed system of pores. With this aim, polymers are impregnated with PI that also function as transporting agents for contact Cl [3,104,106,107]. 

For instance, the introduction of mineral oil into PE films (Fig. 2.29) substantially accelerates isolation of highly viscous MSDA inhibitor. As the concentration of the liquid phase rises above 30-40 wt%, syneresis intensifies as a result of, evidently, formation of the open-pore structure in the polymer matrix. Some contact Cl (e.g. Vital) are themselves pol3uner plasticizers and do not necessitate additional introduction of any structural agents or inhibitors [3,104]. 

It has been proven in [107] that the exudation kinetics of the inhibiting liquid from film samples produced of a mixture of PE - - mineral oil - - contact Cl (Vital, GRM) by pressing under the polymer viscous flow temperature is 

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