| Autor: |
Duque, Daniel, Katsov, K., Schick, M. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 12/8/2002, Vol. 117 Issue 22, p10315, 6p, 1 Diagram, 6 Graphs |
| Abstrakt: |
We apply self-consistent-field theory to T junctions and symmetric tilt grain boundaries in block copolymer systems with and without the addition of homopolymer. We find that, in the absence of homopolymer, T junctions have a larger free energy per unit area than that of the symmetric tilt junctions with which they compete except for a range of angles between about 100° and 130°. With the addition of homopolymer, this range increases. These results are quite consistent with experiment. As the angle between grains increases towards 180°, the T junction undergoes a morphological change somewhat similar to that which occurs in symmetric tilt grain boundaries. At the onset of this change, the free energy per unit area decreases markedly. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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