Melt blending graphite into poly(ethylene-2,6-naphthalate)

Hyunwoo Kim, Christopher Macosko

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Graphite can be an attractive reinforcement for polymers due to its high stiffness and low thermal expansion as well as high electric conductivity. Graphite was melt blended into poly(ethylene-2,6-naphthalate) (PEN). After molding extruded composites into films via biaxial squeezing and uniaxial stretching, their stiffness, thermal expansion and gas barrier properties were tested. Even though graphite in PEN matrix appeared to form unintercalated or partially intercalated morphology, noticeable enhancements in composite stiffness and hydrogen barrier properties were observed. Less improvement in dimensional stability was found. We evaluated average aspect ratios of anisotropic graphite sheets embedded in PEN by interpreting experimental data with composite theories. Young's modulus and dimensional stability of composites were dramatically improved by film drawing.

Original languageEnglish (US)
Title of host publicationSociety of Plastics Engineers Annual Technical Conference
Subtitle of host publicationPlastics Encounter at ANTEC 2007, Conference Proceedings
Number of pages3
StatePublished - Sep 28 2007
EventSociety of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007 - Cincinnati, OH, United States
Duration: May 6 2007May 11 2007

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings


OtherSociety of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007
Country/TerritoryUnited States
CityCincinnati, OH


  • Melt blending
  • PEN/Graphite composite
  • Stiffness
  • Thermal expansion


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