Abstract
We examine equilibrium phase separation in a grafted polymer layer composed of mutually immiscible chains. Under symmetric melt conditions, we predict that there is a transition to a rippled phasea density wave in composition running along the surface. This transition is expected for a molecular weight 2.27 times that for the same species in a simple blend at its demixing threshold. The ripple wavelength is 1.97 times the chain rms end-to-end distance. The lateral rippling is accompanied by a composition oscillation with depth.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1541-1544 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 66 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1991 |
ASJC Scopus subject areas
- Physics and Astronomy(all)