Effect of the position of functional groups in oligobutadiene on structuring under the action of transition metal salts

Abstract

Structuring under the action of FeCl3 and ZnCl2 in liquid butadiene rubbers with different positions and contents of nitrile and carboxyl groups in studied. It is shown that the effect of structuring is manifested much more in rubbers where the functional groups are located inside the macromolecular chain, and not at its ends. Increase in the carboxyl and nitrile group content promotes the appearance of coils of more convoluted form and more difficult access to the metal cations to the oligomer functional groups. This results in retarded vulcanization of the rubbers, impairment of their film forming power, and as a consequence, to a decrease in the protective properties of coatings based on them.