Dynamic mechanical properties of different amine or zinc

barium ions neutralized sul-fonated butyl rubber ionomers were studied. The results showed that glass transition temperature

Tg1 and Tg2 of amine neutralized ionomers were lower than those of metallic ionomers and temperature range of the rubber plateau on the storage modulus vs temperature plot was narrower. E' of the rubber plateau for most amine neutralized ionomers was lower than that of zinc neutralized ionomers plasticized with zinc stearate. With increase of steric hindrance of steric hindrance of amine the temperature range for the rubber plateau became narrow and the height of the loss peak at higher temperature increased. Dynamic mechanical properities of blends of the zinc ionomer with polypropylene

high density polyethylene or SBS showed that Tm increased and Tg1 decreased with increase of polypropylene or polyethylene

while Tg2 changed only slightly Tg1 decreased with increase of SBS content. Decrease of Tg1 is attributed to the mixing of the matrix of ionomer ocntaining ion pairs with amorphous part of the other poly-mer

caused by enhanced compatibility due to physical interpenetrating networks.