Model Filled Polymers .11. Synthesis of Uniformly Crosslinked Polystyrene Microbeads
Technical rept. no. 9, 1 Sep 1990-1 Jun 1991
UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CHEMICAL ENGINEERING
Pagination or Media Count:
Monodisperse sized crosslinked polystyrene PS beads by reaction of styrene S and divinylbenzene DVB, in batch emulsion copolymerization in the absence of emulsifiers, are not uniformly crosslinked, because DVB is more reactive than S. For copolymerization of 1 to 10 mole DVB and S, within each crosslinked PS microbead, 7 crosslink density varies by a factor exceeding two and decreases with uniformity crosslinked PS beads. For both copolymerization techniques, T8 correlates well with crosslink density and PS beads are spherical and monodisperse in size.
- Polymer Chemistry