Smectic ordering in athermal systems of rodlike triblock copolymers

S. Varga, Seth Fraden

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The phase behavior of the system of parallel rigid triblock copolymers is examined using the second virial density functional theory. The triblock particle consists of two identical infinitely thin hard rods of finite lengths on the opposite ends of one central hard cylinder with nonzero length and diameter. Stability analyses and free energy calculations show that the system of parallel particles can form not only uniform nematic and smectic A phases but also a smectic C phase. The stability and structure of the tilted structure are controlled by only the diameter and the length of the central cylinder segment. Interestingly, the diameter affects only the layer tilting and the periodicity, but not the packing fraction of the nematic to smectic- C transition. For all values of cylinder length the usual smectic A and smectic C transitions compete with each other and no nematic-columnar transition is observed. At low and high cylinder lengths the smectic A phase is stabilized first, while the smectic C is the most stable for intermediate length values.

Original languageEnglish
Article number154902
JournalThe Journal of Chemical Physics
Volume127
Issue number15
DOIs
Publication statusPublished - 2007

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Block copolymers
copolymers
Phase behavior
Free energy
Density functional theory
periodic variations
rods
free energy
density functional theory
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Smectic ordering in athermal systems of rodlike triblock copolymers. / Varga, S.; Fraden, Seth.

In: The Journal of Chemical Physics, Vol. 127, No. 15, 154902, 2007.

Research output: Contribution to journalArticle

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