Abstract
The formation of metastable bcc phase at high temperature ordering of micelles was investigated. Anionic polymerization was used to synthesize a symmetric poly(styrene-b-isoprene) (SI) diblock copolymer. The metastable bcc phase nucleated first upon heating and then it transformed over the time to the stable fcc phase. The fcc phase was found to transform into an equilibrium bcc phase at higher temperatures. The results show that bcc nucleates more readily from a melt of spheres.
| Original language | English (US) |
|---|---|
| Article number | 245701 |
| Journal | Physical review letters |
| Volume | 93 |
| Issue number | 24 |
| DOIs | |
| State | Published - Dec 10 2004 |
Bibliographical note
Funding Information:This work was supported by the National Science Foundation through the University of Minnesota MRSEC (DMR-0212302). Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Basic Energy Sciences, Office of Energy Research under Contract No. W-31-102-Eng-38. Portions of this work were performed at DND-CAT, which is supported by DuPont, Dow, NSF (DMR-9304725), the state of Illinois through the Department of Commerce, and the Board of Higher Education Grant No. IBHE HECA NWU 96. We thank Dr. Wesley R. Burghardt for the use of the cone-and-plate shear cell.