The effect of sphere size on the phase behaviors in the rod and sphere mixture system

Naohito Urakami, Masayuki Imai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The addition of polysaccharides, such as chondroitin sulfate (Chs), to the aqueous suspension of tobacco mosaic virus (TMV) results in the TMV aggregation at very dilute TMV concentration compared with the addition of polyethylene oxide (PEO). The Chs chain has a semirigid nature, whereas the PEO has a flexible nature. In this study, we investigated the effect of the size of spherical polymer coils on the phase behaviors in the mixtures of rods and spheres using Monte Carlo simulations. As a model for TMV, we used the spherocylinder particle. The Chs and PEO chains were simplified to spherical particles having different sizes. With the addition of large spherical particles, the system changed from miscible phase to isotropic-isotropic phase separation and then isotropic-nematic phase separation states, whereas with the addition of small spherical particles, the system transformed from miscible isotropic phase to miscible nematic phase. We found that the sphere size had an important influence on the phase behaviors in the mixtures of rods and spheres.

Original languageEnglish
Pages (from-to)533-543
Number of pages11
JournalJournal of Macromolecular Science - Physics
Volume42 B
Issue number3-4 SPEC.
DOIs
Publication statusPublished - 2003
Externally publishedYes

Keywords

  • Isotropic-nematic
  • Monte Carlo simulation
  • Phase separation
  • Rod
  • Sphere
  • Transition

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

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