SOLUTION PROPERTIES OF ALPHA,OMEGA DIAMINO POLYBUTADIENE NEUTRALIZED WITH ORGANIC-ACIDS

The dilute solution behaviour of secondary amine telechelic polybutadiene neutralized with organic acids is reported. In non-polar medium, an increase in viscosities of the solutions (compared to non-neutralized polymer) was found, due to polymer chain-end associations resulting from ammonium-carboxylate ion pair formation. The extent of the association was dependent on the nature of the neutralizing agent and the dielectric constant of the solvent. The addition of low amounts of polar cosolvent did not have any appreciable effect on the viscosity of the solution.