Rheological testing of p-tert-butylphenol epoxy–acrylic resin in the presence of reactive diluents

Abstract

The rheological testing of synthesized para-tert-butylphenol epoxy–acrylic resin in the presence of reactive diluents based on epoxy–acrylic compounds of phenol, para-tert-butylphenol and para-nonylphenol was carried out with a “Rheotest 2” type viscometer. The synthesized resin, the tested reactive diluents, as well as the mixtures based on the resin and the reactive diluents, show non-Newtonian rheological behaviour of the pseudoplastic type. This behaviour can be explained by taking into consideration the possible interactions among the chains of the phenolic reactive diluents, and with the chain of the resin. These interactions can also be due to –OH phenolic groups. As a result, a false increase is registered in the molecular weight of the systems studied.