Abstract
The results of a detailed theoretical investigation of the phase behavior of A m-b-(B-b-A) n multiblock copolymer melts are presented for the special case of m = 20 and n = 10. The presence of two strongly different molecular length scales results in the formation of a large-length-scale lamellar structure of alternating A 20 and (B-b-A) 10 layers on cooling. On further cooling, the (B-b-A) 10 layers subsequently transform internally into small-length-scale layers of the A and B blocks: a lamellar-in-lamellar morphology. The final structure consists of an alternation of one "thick" layer and seven "thin" layers and compares favorably with recent experimental results of Matsushita and co-workers on slightly different systems.
Original language | English (US) |
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Pages (from-to) | 6765-6770 |
Number of pages | 6 |
Journal | Macromolecules |
Volume | 39 |
Issue number | 19 |
DOIs | |
State | Published - Sep 19 2006 |
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry