Morphological investigation of styrene and acrylamide polymer microspheresprepared by dispersion copolymerization

The morphology of the styrene and acrylamide copolymer microspheres prepare d by dispersion copolymerization in an ethanol/ water medium was investigat ed. The effects of the styrene/acrylamide ratio, ethanol/water ratio and st abilizer concentration on the particle size and size distribution were stud ied. It was found that the initial solubility parameter of the system was t he key factor in the process. The comonomer acrylamide also played an impor tant role in the particle size and size distribution in the presence of cro ss-linking agent (divinylbenzene).