Double periodic lamellar-in-lamellar structure in multiblock copolymer melts with competing length scales

Rikkert Nap, Nazar Sushko, Igor Erukhimovich, Gerrit Ten Brinke*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

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 languageEnglish (US)
Pages (from-to)6765-6770
Number of pages6
JournalMacromolecules
Volume39
Issue number19
DOIs
StatePublished - Sep 19 2006

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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