Melt compounding with graphene to develop functional, high performance elastomers

Araby, Sherif and Zaman, Izzuddin and Meng, Qingshi and Kawashima, Nobuyuki and Michelmore, Andrew and Kuan, Hsu-Chiang and Majewski, Peter and Ma, Jun and Zhang, Liqun (2013) Melt compounding with graphene to develop functional, high performance elastomers. Nanotechnology, 24 . p. 165601. ISSN 0957-4484

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Abstract

Rather than using graphene oxide, which is limited by a high defect concentration and cost due to oxidation and reduction, we adopted cost-effective, 3.56 nm thick graphene platelets (GnPs) of high structural integrity to melt compound with an elastomer—ethylene–propylene–diene monomer rubber (EPDM)—using an industrial facility. An elastomer is an amorphous, chemically crosslinked polymer generally having rather low modulus and fracture strength but high fracture strain in comparison with other materials; and upon removal of loading, it is able to return to its original geometry, immediately and completely. It was found that most GnPs dispersed uniformly in the elastomer matrix, although some did form clusters. A percolation threshold of electrical conductivity at 18 vol% GnPs was observed and the elastomer thermal conductivity increased by 417% at 45 vol% GnPs. The modulus and tensile strength increased by 710% and 404% at 26.7 vol% GnPs, respectively. The modulus improvement agrees well with the Guth and Halpin-Tsai models. The reinforcing effect of GnPs was compared with silicate layers and carbon nanotube. Our simple fabrication would prolong the service life of elastomeric products used in dynamic loading, thus reducing thermosetting waste in the environment.

Item Type:Article
Uncontrolled Keywords:EPDM; graphene; electrical conductivity
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
T Technology > TS Manufactures > TS1870-1935 Rubber industry
ID Code:6230
Deposited By:Dr Izzuddin Zaman
Deposited On:08 Dec 2014 14:37
Last Modified:08 Dec 2014 14:37

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