Issue 12, 2016

Effect of chain structure on the thermal conductivity of expanded graphite/polymer composites

Abstract

The thermal conductivity of expanded graphite (EG)/polymer composites is investigated in terms of polymer chain structures. The EG/polyphenylene sulfide (PPS) composite with a backbone of benzene rings shows the continuous highest thermal conductivity and the fastest rate of enhanced ratio at the same content. Then it is followed by EG/syndiotactic polystyrene (sPS) composites with side groups of regularly arranged benzene rings. The last are the EG/amorphous polystyrene (aPS) composites with side groups of randomly arranged benzene rings. Our results show that the chain structures of polymer matrices have a great influence on the interaction and crystallization of EG/polymer composites, which leads to the different thermal behavior. More precisely, the strong π–π interaction between EG and polymer, the nucleation of crystal at the interface of EG/polymer and the relatively rich EG content in the amorphous phase are benefits to the enhancement of thermal conductivity. These factors are proved to be extremely important for the design of high thermally conductive composites in the fields of science and engineering.

Graphical abstract: Effect of chain structure on the thermal conductivity of expanded graphite/polymer composites

Article information

Article type
Paper
Submitted
09 Dec 2015
Accepted
13 Jan 2016
First published
18 Jan 2016

RSC Adv., 2016,6, 10185-10191

Author version available

Effect of chain structure on the thermal conductivity of expanded graphite/polymer composites

S. Deng, J. Wang, G. Zong, F. Chen, S. Chai and Q. Fu, RSC Adv., 2016, 6, 10185 DOI: 10.1039/C5RA26272K

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