Abstract
Miktoarm (μ-star) polymers are star-shaped block copolymers where chemically different homopolymers constitute the different arms. The quantitative determination of different segments of the star polymers by liquid chromatography under critical conditions (LC-CC) is described. In the present study tri-arm and tetra-arm model polymers with polystyrene, polybutadiene, polyisoprene and poly-α-methyl styrene arms are analyzed. Operating at the respective critical conditions, homopolymer arms are made chromatographically invisible. Under these conditions the residual (chromatographically visible) arms can be analyzed with regard to their molar masses. The accuracy of the quantification depends on the fit of the calibration procedure and the detector response to the actual chemical compositions. The results clearly indicate that LC-CC yields valuable structural information on block copolymers with complex architectures.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1424-1429 |
| Number of pages | 6 |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 202 |
| Issue number | 8 |
| DOIs | |
| State | Published - Jun 15 2001 |
| Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Chemistry
- Polymers and Plastics
- Physical and Theoretical Chemistry
- Organic Chemistry