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

Rikkert Nap; Nazar Sushko; Igor Erukhimovich; Gerrit Ten Brinke

doi:10.1021/ma061233z

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

Biomedical Engineering

Research output: Contribution to journal › Article › peer-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 language	English (US)
Pages (from-to)	6765-6770
Number of pages	6
Journal	Macromolecules
Volume	39
Issue number	19
DOIs	https://doi.org/10.1021/ma061233z
State	Published - Sep 19 2006

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma061233z

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title = "Double periodic lamellar-in-lamellar structure in multiblock copolymer melts with competing length scales",

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.",

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T1 - Double periodic lamellar-in-lamellar structure in multiblock copolymer melts with competing length scales

AU - Nap, Rikkert

AU - Sushko, Nazar

AU - Erukhimovich, Igor

AU - Ten Brinke, Gerrit

PY - 2006/9/19

Y1 - 2006/9/19

N2 - 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.

AB - 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.

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