Self-assembly of lamellar microphases in linear gradient copolymer melts

Nicholas B. Tito, Scott T. Milner, Jane E.G. Lipson

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We investigate lamellar microphases in linear gradient copolymer melts by a combination of techniques, including numerical solutions of self-consistent field equations, scaling theory, and analysis of the strong-segregation limit. In particular, we construct a Flory theory to predict the scaling of the equilibrium lamellar width Leq as a function of comonomer incompatibility measured by πN. The Flory theory balances chain stretching with increased monomer repulsive interactions resulting from conformational fluctuations about a state of uniformly stretched chains, that obtains in the strong-segregation limit. We find Leq/Rg ∼ (πN)1/6, which agrees well with numerical results. Remarkably, this is the same result as for symmetric diblock copolymers, although for quite different physical reasons.

Original languageEnglish (US)
Pages (from-to)10612-10620
Number of pages9
JournalMacromolecules
Volume43
Issue number24
DOIs
StatePublished - Dec 28 2010

All Science Journal Classification (ASJC) codes

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

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