ADHESIVE PROPERTIES OF SOME PRESSURE-SENSITIVE ADHESIVE AGENTS CONTAINING OLIGOMER ADDITIVES

This paper deals with the influence of oligomers, namely propylene oil and butylene oil, of different molecular weight on the adhesive prope rties of atactic polypropylene (aPP) and its mixtures with styrene-2-e thylhexyl acrylate (S-EHA) copolymer. The mechanical work of adhesion A(m) of the mixture containing atactic polypropylene and oligomer incr eases with the molecular weight of the oligomer, which was more signif icant in the case of propylene oil. For ternary mixtures aPP-S-EHA cop olymer/oligomer a maximum of adhesion can be observed if the content o f the S-EHA copolymer in the mixture reaches about 30 mass-%. In the a bsence of oligomers in the mixture a minimum of adhesion can be observ ed for this composition, which can be attributed to the incompatibilit y of the remaining components.