| Attributs | Valeurs |
|---|
| type
| |
| Is Part Of
| |
| Subject
| |
| Title
| - Poly(styrene) Latex Carrying Cerium(IV)-Initiated Terminally AttachedCleavable Chains: Analysis of Grafted Chains and Model of the SurfaceLayer
|
| has manifestation of work
| |
| related by
| |
| Author
| |
| Abstract
| - Ce(IV)-initiated grafting of N(2-methoxyethyl-acrylamide) (MEA) to a shell of poly(styrene-co-2-hydroxyethyl acrylate) on polystyrene latex has been performed and the molecular weight distributionof the graft determined by size exclusion chromatography (SEC) on grafted chains cleaved from the surface.Cationic poly(styrene) beads were covered with a shell containing poly(styrene-co-2-hydroxyethyl acrylate)utilizing an azo initiator. The density of the surface hydroxyl groups was assessed by saponification ofthe ester bonds followed by conductometric titration of the resulting carboxylic residues. Ce(IV) redoxinitiation of MEA from the surface hydroxyl groups produced chains terminally attached to the latexsurface. MEA consumption kinetics were monitored by HPLC of the supernatant on a reverse phasecolumn. Competing solution polymerization of MEA occurred, probably due to leakage of shell copolymerfrom the beads. The terminally attached chains were characterized by quantitative SEC following cleavagefrom the surface by saponification, allowing a model of the tethered surface to be developed.
|
| article type
| |
| is part of this journal
| |
