By Irina A. Starostina, Oleg V. Stoyanov, Rustam Ya Deberdeev
This publication provides the research of updated suggestions used for the decision of acid-base homes in view in their applicability to exam of good natural and inorganic surfaces. The reviews were performed through the authors due to the fact that 1993, exhibiting experimental information on floor homes of greater than one hundred fifty polymers, comparable to carbocatenary and heterochain polymers, copolymers and their blends, in addition to various epoxy and rubber compositions utilized in adhesive joints. The adhesive skill of metal-polymer structures in keeping with epoxy compositions, polyolefins, and rubbers used to be studied as a functionality of absolute distinction in acid-base homes of adhesive and adherends, and the chance to foretell adhesive interplay in this foundation was once experimentally validated.
The e-book indicates the real position that acid-base interactions play in setting up interfacial adhesive-adherent touch and descriptions functional options concerning parameters of quantitative estimation of acid-base floor houses that suggests the connection with adhesive skill in polymer-metal structures.
Creating polymeric fabrics with higher power features whilst involved with metals is an important challenge whilst adhesive joints are designed. The authors acquired experimental facts for thermodynamic and acid-base homes of approximately 2 hundred natural and inorganic surfaces that discover a vast useful program. those effects can be utilized as a reference resource to foretell the adhesive skill of alternative coating platforms. the chance to foretell adhesive interplay of adhesive with adherend, making an allowance for absolutely the distinction of their acidity and basicity, used to be tested experimentally.
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Additional info for Polymer Surfaces and Interfaces: Acid-Base Interactions and Adhesion in Polymer-Metal Systems
Sample text
According to van Oss et al. 10 constitute the Lifshitz–van der Waals component: γLW= γd + γi + γр. 11) Here, the energies of the inductive and polar interactions γi and γр are the second smallness order values compared with the dispersive and hydrogen interactions. Therefore, only the γd value will be then used, but the γi and γр values will be neglected. 10 γh, γπ, γаd, and γе into the acid-base component [17]: γAB= γh + γπ + γаd + γе. 12) So, in most cases, the SFE is additively defined by two constituents, namely the dispersive and acid-base components: γ = γd + γ AB.
For the sake of simplicity, no liquid film is assumed to be around a drop on a solid surface. Today, the relationships between the advancing, receding, and equilibrium angles based on the Wenzel [29] or Cassie [47] equations are known, however the problem of determining the equilibrium contact angle is still unsolved. It was found that the advancing angles remain unchanged during a certain amount of time, while the receding angles depend on time of contact with support, that is, they gradually become smaller as the contact time increases.
Contact angles remain constant within time periods stated. 77 cP) and water (~1 cP) at room temperature, wetting of surface by glycerol and reaching constant advancing angle values occur more slowly (during 2 min). Basing on the dependencies obtained it may be said that contact angle measurements for aniline and water can be performed virtually just after they have been applied. Other liquids also wet the surface under test, with the advancing angle getting constant in several seconds. This is evidenced by photographs of drops of several liquids made 20, 40, and 60 s after their application (Fig.