By Vladimir Kestelman, Roman Veslovsky
If you would like a normal figuring out of polymer adhesion, this publication isn't really for you. it's for the complex reader and is overestimated!
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Extra resources for Adhesion of Polymers
In the course of interaction of a surfactant with an oligomer, the surfactant’s hydrophilicity and hydrophobicity, its structure and hydrophilic–oleophilic balance will change depending on its polarity and where in the surfactant molecule the active groups are located. But independently of this, such an interaction always results in increase of the surfactant solubility in the oligomer and in decrease of its surface activity. 4 presents the isotherms of the surface tension of the DEG1–surfactant system at various time intervals after mixing.
To determine the quantitative contribution of the adhesion interaction of the epoxy coating with a substrate to the value of the modulus of elasticity, epoxy coatings in the shape of free films 100 mm thick, formed under similar conditions on both sides of the combined substrate as well as on aluminum foil, were tested. The epoxy coating was separated by dilution of the PET film with phenol at 313 K and sulfuric acid was applied to the aluminum for a short period. 2). The results show that the modulus of elasticity of the thickest of the studied films on the high-energy substrate appeared to be 20% and for the low-energy substrate 13% higher than that of the films tested without substrates.
The use of curing agents for polymeric adhesives and coatings with surface-active properties is of considerable interest. These include curing agents for epoxy resins like oligoamineamides (OAA) or versamides. Such substances change the surface tension of the epoxy resins and their wetting capacity is enhanced by the fatty alkyl chain and by the polar amine groups; in structure they are similar to detergents. The curing of epoxy resins by liquid polyamide resins gives products that have good wetting properties and better adhesion and elasticity compared with epoxy resins cured by polyamines.