Model Filled Polymers. 6. Determination of the Crosslink Density of Polymeric Beads by Swelling
Abstract
A new method has been developed to characterize the crosslink density of monodisperse polymeric microbeads by equilibrium swelling on an ultrafiltration membrane, followed by the removal of excess solvent by centrifugation. For polystyrene copolymerized with divinylbenzene and polymethyl methacrylate copolymerized with ethylene glycol dimethacrylate, the mole percent of crosslinked units, approximated, but always exceeded, the mole percent of divinyl monomer. Crosslink densities were varied from 1-11%. (jes)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 1990
- Accession Number
- ADA225783
Entities
People
- J. J. Aklonis
- R. Salovey
- Z. Y. Ding
Organizations
- University of Southern California