Authors: M. Corea, J.M. del Río
Affilation: Instituo Politécnico Nacional, Mexico
Pages: 977 - 980
Keywords: functionzalized particles, carboylic groups, swelling
In this work, two series of polymeric particles of poly(butyl acrylate-co-methyl methacrylate), P(BuA-MMA) functionalized with acrylic acid (AA) were synthesized by means of emulsion polymerization techniques. In both cases, the total carboxylic concentration was varied inside the particle between 0, 5, 10, 15 and 20 wt %. and number of particles was maintained constant in two systems. In the fist series, homogeneous latex particles were synthesized, whereas in second series, the latex particles were synthesized in three layers, where a gradient of carboxylic groups was generated inside the particle. The behaviour of polar and non-polar groups was determined by means of specific partial volume and compressibility at infinite dilution, which were calculated from density and sound speed measurements at 30, 50 and 70 ºC.