Abstract
Homogeneous block copolymer melts are predicted to exhibit a decrease in interchain segment correlation (a “correlation hole”) at wavevectors corresponding to a polymer coil radius. Small-angle neutron scattering data are presented which demonstrate this effect in two 1,4-polybutadiene-1,2-polybutadiene diblock copolymers. These results are quantitatively predicted by the mean-field theory of Leibler, thereby providing a new method for determining the Flory interaction parameter x in binary polymer blends. x was found to be dependent on sample composition, which can be attributed to equation-of-state contributions to the mixing free energy.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 525-528 |
| Number of pages | 4 |
| Journal | Macromolecules |
| Volume | 18 |
| Issue number | 3 |
| DOIs | |
| State | Published - May 1985 |