Next Article in Journal
Theoretical Evaluation of the Influence of Molecular Packing Mode on the Intramolecular Reorganization Energy of Oligothiophene Molecules
Next Article in Special Issue
Intercalation Polymerization Approach for Preparing Graphene/Polymer Composites
Previous Article in Journal
High-Tg, Low-Dielectric Epoxy Thermosets Derived from Methacrylate-Containing Polyimides
Previous Article in Special Issue
Improving Kinetics of “Click-Crosslinking” for Self-Healing Nanocomposites by Graphene-Supported Cu-Nanoparticles
Open AccessArticle

Thermomechanical Behavior of Polymer Composites Based on Edge-Selectively Functionalized Graphene Nanosheets

by Ki-Ho Nam 1,†, Jaehyun Cho 1,† and Hyeonuk Yeo 2,*
Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 565-902, Korea
Department of Chemistry Education, Chemistry Building, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 41566, Korea
Author to whom correspondence should be addressed.
K.-H.N. and J.C. contributed equally to this work.
Polymers 2018, 10(1), 29;
Received: 21 November 2017 / Revised: 22 December 2017 / Accepted: 23 December 2017 / Published: 26 December 2017
(This article belongs to the Special Issue Graphene-Polymer Composites)
In this study, we demonstrate an effective approach based on a simple processing method to improve the thermomechanical properties of graphene polymer composites (GPCs). Edge-selectively functionalized graphene (EFG) was successfully obtained through simple ball milling of natural graphite in the presence of dry ice, which acted as the source of carboxyl functional groups that were attached to the peripheral basal plane of graphene. The resultant EFG is highly dispersible in various organic solvents and contributes to improving their physical properties because of its unique characteristics. Pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA) were used as monomers for constructing the polyimide (PI) backbone, after which PI/EFG composites were prepared by in situ polymerization. A stepwise thermal imidization method was used to prepare the PI films for comparison purposes. The PI/EFG composite films were found to exhibit reinforced thermal and thermo-mechanical properties compared to neat PI owing to the interaction between the EFG and PI matrix. View Full-Text
Keywords: graphene; polyimide; polymer composite; thermo-mechanical properties graphene; polyimide; polymer composite; thermo-mechanical properties
Show Figures

Figure 1

MDPI and ACS Style

Nam, K.-H.; Cho, J.; Yeo, H. Thermomechanical Behavior of Polymer Composites Based on Edge-Selectively Functionalized Graphene Nanosheets. Polymers 2018, 10, 29.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop