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Determination of the latex particle size in emulsion polymerization of methyl methacrylate with low
閱讀：298 發(fā)布時間：2017-5-24B. B. Troitskii,A. A. Lokteva,V. N. Denisova,M. A. Novikova,A. N. Konev,I. L. Fedyushkin
Razuvaev Institute of Organometallic Chemistry,Russian Academy of SciencesNizhny NovgorodRussia
摘要：The mean size of the latex particles formed in emulsion polymerization of methyl methacrylate under definite conditions (water: monomer volume ratio 15: 1, 80°C, potassium persulfate concentration 0.07 wt %) decreases from 200 to 9–10 nm as the concentration of an ionic surfactant (anionic Disponil AES 60, SDS, cationic C19H42BrN) is increased from 0.0 to 1.0 wt %. The nonionic surfactants studied influence the size of the latex particles formed differently: with ALM-10, the particle size decreases from 200 to 150–190 nm, whereas with ALM-7 and ALM-2 it increases from 200 to 320 nm as the surfactant concentration is increased from 0.0 to 1.0 wt %. An increase in the concentration of F127 amphiphilic ternary block copolymer from 0.0 to 1.0 wt % leads to a monotonic decrease in the size of the poly(methyl methacrylate) latex particles formed from 200 to 53 nm.