The influence of the content and composition of polymeric petroleum resins (PPRs) on the proper ties of incongealable sealants based on butyl rubber was studied. It was shown that the introduction of PPR B grade increases the adhesion ability of these sealants to duralumin. It was concluded that use of the acid-base approach is a good tool for explaining the nature of adhesive relationships.

We report on the surface energy characteristics of composite materials based on low-density polyethylene with addition of bentonite and organic clay. Investigated were the surface free energy, its components and parameters by wetting methods according to Berger, spatial method, and method of nonlinear systems. The determined characteristics were carried out by the selective wetting conditions for the individual constituents of the composition, including the clay powder. The thermal, mechanical, and morphological properties of obtained composites were investigated. The possibility for predicting the surface properties of composite materials based on component-wise analysis was demonstrated.

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