Investigating local mechanical properties of polyimide in graphite/polyimide nanocomposites

Jing Suei Gao, Jia-Lin Tsai*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study aims to investigate the local mechanical properties of polyimide near the graphite sheet in the graphite/polyimide nanocomposites. The atomistic structure of the nanocomposites with minimized energy was created after performing NVT ensemble in the molecular dynamics (MD) simulation. In order to understand the influence of graphite on the molecular configuration, the corresponding density and order parameter of the polyimide near the graphite/polyimide interface were evaluated and the results were compared with the bulk value. In addition, the local mechanical property of polyimide polymer was evaluated based on the characterization of local stress distribution. Results indicated that there is a glassy layer of polyimide formed in the vicinity of graphite sheet. Within the adsorption layer, it was found that the polyimide chains are stacked compactly and oriented along the graphite surface so that the corresponding density is fairly high. Moreover, the polyimide near the graphite/polyimide interface exhibit higher stress state, which clearly illustrates the local mechanical property of polyimide close to the interface could be moderated dramatically by the graphite sheet.

Original languageEnglish
Title of host publication7th Asian-Australasian Conference on Composite Materials 2010, ACCM 2010
PublisherACCM-7 Organizing Committee
Pages618-621
Number of pages4
ISBN (Print)9781632660756
StatePublished - 1 Jan 2010
Event7th Asian-Australasian Conference on Composite Materials 2010, ACCM 2010 - Taipei, Taiwan
Duration: 15 Nov 201018 Nov 2010

Publication series

Name7th Asian-Australasian Conference on Composite Materials 2010, ACCM 2010
Volume1

Conference

Conference7th Asian-Australasian Conference on Composite Materials 2010, ACCM 2010
CountryTaiwan
CityTaipei
Period15/11/1018/11/10

Keywords

  • Graphite
  • Local properties
  • Molecular dynamic simulation
  • Nanocomposites

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