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The reactions of ,V,,V,IV',;V'-tetrarnethyl-l,2-diarninoethane, -1,3-diaminopropane, -1,4-diaminobutane, and -1,6-diaminohexane with a number of a,a>-dibromoalkanes were investigated in solution. The main products of these reactions consisted of cyclic diammonium compounds (1:1 addition), linear diammonium compounds (1:2 addition), and ionene polymers (polyaddition). The conditions under which these products are formed as well as the information described in part I permit one to conclude that the reactions of tetramethyldiaminoethane with dibromobutane and of tetramethyldiaminopropane with dibromopropane yield ionene polymers with the highest known density of positive charges in a polymer backbone. The reaction of tetramethyldiaminobutane with dibromomethane in DMF-methanol (1:1 by volume) yielded unexpectedly tetramethyldiaminobutane dihydrobromide, indicating participation of methanol in the reaction. Elucidation of

SYNOPSISMagnetic latex particles were prepared by the emulsion polymerization of styrene at 70°C in the presence of a commercial ferrofluid containing surfactant-stabilized magnetite particles in the aqueous phase or its modification by ultrafiltration, using potassium persulfate as an initiator. The effects of diversified variables such as the amounts of initiator, monomer, and additive (calcium chloride and fluorescent dyes) on the polymerization reaction and particle characteristics were investigated. The general polymerization features were analogous to those of ordinary emulsion polymerizations. Transmission electron microscopy revealed that when the commercial ferrofluid was used the magnetite particles localized in the latex particles and the magnetite content varied from particle to particle and that when the ferrofluid was used after ultrafiltration the magnetite particles were dispersed well in the latex particles.

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