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

Lan He, Kai Leung Yung, Yun Wen Shen, Yan Xu

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


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 .lnm, 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 publicationAdvances in Materials Manufacturing Science and Technology II - Selected Papers from the 12th International Manufacturing Conference in China
Number of pages4
Publication statusPublished - 1 Dec 2006
Event12th International Manufacturing Conference in China, IMCC2006 - Xi'an, China
Duration: 21 Sep 200623 Sep 2006

Publication series

NameMaterials Science Forum
ISSN (Print)0255-5476


Conference12th International Manufacturing Conference in China, IMCC2006


  • GB-spring-bead model
  • Liquid crystalline polymers
  • Molecular dynamics simulations
  • Shear viscosity
  • The orientational order parameter

ASJC Scopus subject areas

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

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