Improved mechanical properties through engineering the interface by poly (ether ether ketone) grafted graphene oxide in epoxy based nanocomposites

Katti, Prajakta and Kundan, K V and Kumar, S and Bose, Suryasarathi (2017) Improved mechanical properties through engineering the interface by poly (ether ether ketone) grafted graphene oxide in epoxy based nanocomposites. In: POLYMER, 122 . pp. 184-193.

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Abstract

In this work, hydroxylated HPEEK poly (ether ether ketone)] was covalently grafted on to graphene oxide (GO) sheets and methodically characterized using F1'IR, TEM and XPS. The epoxy composites with GO and HPEEK grafted graphene oxide (HPEEK-g-GO) were prepared using mechanical stirring coupled with a bath sonicator to improve the dispersion and were subsequently cured at 80 degrees C and 180 degrees C. With the addition of only a small amount (0.5 wt%) of HPEEK-g-GO, an impressive 42% increase in storage modulus, 65% enhancement in hardness and 31% increase in fracture toughness was observed with respect to the control epoxy sample. In addition, significant enhancement in tensile strength by 7% was realized in epoxy composites containing 0.5 wt % of HPEEK-g-GO. This improvement in structural properties was attributed to reinforcement by HPEEK-g-GO having sound interface with epoxy. The epoxy composites containing HPEEK-g-GO also showed improvement in glass transition temperature along with the thermal stability up to 300 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	POLYMER
Additional Information:	Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	01 Sep 2017 09:52
Last Modified:	01 Sep 2017 09:52
URI:	http://eprints.iisc.ac.in/id/eprint/57723

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