EFFECT OF COORDINATION BETWEEN POLYMER-CH AINS ON THE SOLUTION BEHAVIOR OF ZN-SIIR PSVP BLENDS/

Ionic coordination between zinc sulfonated butyl rubber (Zn-SIIR) and styrene-4-vinyl-pyridine copolymer (PSVP) in solution was investigated , It was found that viscosity oi the blend solution varied with-the co mposition and attained maximum as the molar ratio of zinc sulfonated g roups to pyridine groups was 1 : 1, implying that coordination-type in teraction occurred between the two kinds of groups, and each zinc ion coordinated with two nitrogen atoms in pyridine rings, The coordinatio n strongly affected the solution behavior of Zn-SIIR/PSVP blends, Visc osity increased rapidly as concentration of the blend increased, Unusu al viscosity-temperature relationship was found for the blend solution s with low levels of polar cosolvent (hexanol).