ChemInform Abstract: CHARACTERISTICS OF CHAIN TRANSFER TO THE MONOMER IN RADICAL POLYMERIZATION OF N,N‐DIALKYL‐N,N‐DIALLYLAMMONIUM HALIDES

Synthesis of Purine- and Pyrimidine-Substituted Heptadienes. The Stereochemistry of Cyclization and Cyclopolymerization Products

“…Unlike dienes 1 − 5 , the copolymerization of 6 with SO 2 can be conveniently carried out at 81 °C with AIBN initiation to generate the copolymer 26 as shown in eq 9 . If 26 has the expected cis-linked pyrrolidine rings as do the homopolymers of diallylammonium salts, we may expect that the steric demands of the groups attached to the quaternary nitrogen (methylene and methyl) would be similar and that the linkages 26a and 26b would be present in the copolymer.…”

The new effective flocculants – Copolymers of N,N-dimethyl-N,N-diallyl-ammonium chloride and N,N-dimethylacrylamide

“…[12][13][14][15] in the radical polymerization reaction the monomers DMDAAC react with both double bonds to form five-membered cyclic structures in macrochain, because the elementary act of this structure formation is sterically more favorable than that of six-membered cyclic structure formation. But according to [16,17] we cannot exclude the presence of terminal double bonds CH 2 CH in the macrochain of copolymers P(DMDAAC-DMAA). Therefore, based on this we can assume that the macromolecules of the obtained copolymers can have the following structure (Scheme 1):…”

“…But it was also determined that terminal double bonds CH 2 CH are present in macromolecules of poly-N,N-dimethyl-N,N-diallyl-ammonium chloride (P(DMDAAC)). The presence of such bonds has been proven by radiochemical method [16], and NMR spectroscopy [17]. Moreover, polymerization of N,N-dimethyl-N,N-diallylammonium chloride results in a product with a higher molecular weight than in the case of N,N-dimethyl-N,N-diallylammonium bromide [18].…”