The cyclo-copolymerization of diallyl compounds and sulfur dioxide, 4. 4-(4-pyridyl)-1,6-heptadiene hydrochloride and sulfur dioxide

Copolymers of 4-(4-pyridyl)-1,6-heptadiene hydrochloride ( 1 ) and 4-(1-buten-4-yl)pyridine hydrochloride ( 2 ) with sulfur dioxide were prepared and their properties were investigated. The effects of the copolymerization conditions on the yields and viscosities of the obtained copolymers were studied. Their structures were studied by elemental analyses, IR, and ¹H- and ¹³C-NMR spectroscopy.