Effects of surface conditions on pheological properties and phase orientation of sheared LCP melts in nanochannels by MD studies

L. He, Kai Leung Yung, Y.W. Shen, Y. Xu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The rheological properties and phase orientation of liquid crystalline polymer (LCP) melts flowing in a nanochannel with different surface roughness are investigated by molecular dynamics (MD) simulations. Simulation results show the surface roughness has great impact on the rheological properties and phase orientation of LCP melts in the nanochannel (cross section is 12nm). As the amplitude of serrations increases, the shear viscosity increases nonlinearly and the value of orientational order parameter decreases. When the serration amplitude is larger than 1.1nm, a phase transition (from nematic to isotropic phase) of LCP melt happens, which makes flowing in nanochannels more difficult. On the other hand, the influence of serration period on the shear viscosity and orientational order parameter are found not so obvious. Findings in this study will be helpful for injection molding plastic products with nanofeatures.
Original languageEnglish
Title of host publicationMaterials science forum
PublisherTrans Tech Publications Ltd
Pages624-627
Number of pages4
ISBN (Print)9780878494217
DOIs
Publication statusPublished - 2006
EventInternational Manufacturing Conference in China [IMCC] -
Duration: 1 Jan 2006 → …

Conference

ConferenceInternational Manufacturing Conference in China [IMCC]
Period1/01/06 → …

Keywords

  • GB-Spring-Bead model
  • Liquid crystal polymer (LCP)
  • Molecular dynamic simulation
  • Shear viscosity
  • The orientational order parameter

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

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