# Anisotropic thermal characteristics of graphene-embedded polyimide composite sheets

> Title: Anisotropic thermal characteristics of graphene-embedded polyimide composite sheets Page Range: p.315-322 Author(s): Seong-Yeob Park; Jong-Seong Bae; Jin-Gyu Kim; Min-Wook Oh; Jungsoo Kim; Dae-Geun Nam; Jeong Hyun Yeum; Weontae Oh File size: Download the pdf (subscribers only) Buy the pdf (non-subscribers) Journal:...

Canonical URL: https://polymerjournals.com/anisotropic-thermal-characteristics-of-graphene-embedded-polyimide-composite-sheets/
Published: 2016-05-01T00:00:00+00:00
Categories: Polymers and Polymer Composites

**Title: Anisotropic thermal characteristics of graphene-embedded polyimide composite sheets**
 Page Range: p.315-322
 Author(s): Seong-Yeob Park; Jong-Seong Bae; Jin-Gyu Kim; Min-Wook Oh; Jungsoo Kim; Dae-Geun Nam; Jeong Hyun Yeum; Weontae Oh
 File size:
 ![](http://dload.gif) [Download the pdf](http://journals.asp?Page=111&JournalDownload=ON&JournalType=ppc&JournalIssue=ppc24-5&JournalID=102743&JIP=) (subscribers only)
 ![](http://handbuy.gif) Buy the pdf (non-subscribers)
 Journal: Polymers and Polymer Composites
 Issue Year: ppc
 Volume: 24
 Issue No: No.5

**Abstract**
 Polyimide-graphene (PIG) composites were prepared, and their thermal properties were characterised as films or sheets. Graphene loadings were controlled up to 8 wt.% or 12 wt.% in their composites. The graphenes used in this work were prepared by the chemical treatment of graphite. The as-prepared polyimide-graphene composites were thermally characterised in films or sheets. The thermal conductivities of the PIG sheets were separately analysed in both in-plane and out-of-plane directions. The thermal expansion coefficients (TECs) of the PIG composites slightly changed with the amount of graphene added to the composites. The in-plane thermal conductivities were higher than the out-of-plane thermal conductivities, and the thermal conductivities of both directions proportionally increased with the graphene loadings in the PIG composites. The temperature-dependent stresses of the composite films monotonically decreased with the graphene loadings. The experimentally obtained thermal characteristics of the polyimide-graphene composites were compared and discussed on the basis of the composite morphologies. 37 Refs.

---