COPOLYMERIZATION OF N,N-DIALKYL-N,N-DIALL YLAMMONIUM HALIDES WITH SULFUR-DIOXIDE

Radical-initiated copolymerization of N,N-dialkyl-N,N-diallylammonium halides with sulfur dioxide was studied in aqueous medium and DMSO. It was shown that composition of the copolymers obtained by the reaction of sulfur dioxide with N,N-dialkyl-N,N-diallylammonium chloride is in dependent of the reaction temperature (in the range 293-353 K), the ra tio of monomers in the feed, and the degree of polymerization, and cor responds to the equimolar ratio of comonomers. The temperature depende nce of the reaction rate in aqueous medium shows maximum at 320-325 K, whereas in DMSO the rate first slowly and then (above 338 K) sharply increases. At any temperature, the reaction rate is maximal at the equ imolar ratio of comonomers. It was found that SO2 addition to N,N-dial kyl-N,N-diallylammonium chloride leads to the formation of sulfonylpyr rolidinium structures. N,N-Dialkyl-N,N-diallylammonium bromide and iod ide virtually do not enter into copolymerization with SO2.