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AuthorMayoral, B.
AuthorHarkin-Jones, E.
AuthorKhanam, P. Noorunnisa
AuthorAlmaadeed, M. A.
AuthorOuederni, M.
AuthorHamilton, A. R.
AuthorSun, D.
Available date2023-05-29T10:28:26Z
Publication Date2015-01-01
Publication NameRSC Advances
Identifierhttp://dx.doi.org/10.1039/c5ra08509h
CitationMayoral, B., Harkin-Jones, E., Khanam, P. N., AlMaadeed, M. A., Ouederni, M., Hamilton, A. R., & Sun, D. (2015). Melt processing and characterisation of polyamide 6/graphene nanoplatelet composites. Rsc Advances, 5(65), 52395-52409.
ISSN2046-2069
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84934887542&origin=inward
URIhttp://hdl.handle.net/10576/43538
AbstractGraphene, due to its outstanding properties, has become the topic of much research activity in recent years. Much of that work has been on a laboratory scale however, if we are to introduce graphene into real product applications it is necessary to examine how the material behaves under industrial processing conditions. In this paper the melt processing of polyamide 6/graphene nanoplatelet composites via twin screw extrusion is investigated and structure-property relationships are examined for mechanical and electrical properties. Graphene nanoplatelets (GNPs) with two aspect ratios (700 and 1000) were used in order to examine the influence of particle dimensions on composite properties. It was found that the introduction of GNPs had a nucleating effect on polyamide 6 (PA6) crystallization and substantially increased crystallinity by up to 120% for a 20% loading in PA6. A small increase in crystallinity was observed when extruder screw speed increased from 50 rpm to 200 rpm which could be attributed to better dispersion and more nucleation sites for crystallization. A maximum enhancement of 412% in Young's modulus was achieved at 20 wt% loading of GNPs. This is the highest reported enhancement in modulus achieved to date for a melt mixed thermoplastic/GNPs composite. A further result of importance here is that the modulus continued to increase as the loading of GNPs increased even at 20 wt% loading and results are in excellent agreement with theoretical predictions for modulus enhancement. Electrical percolation was achieved between 10-15 wt% loading for both aspect ratios of GNPs with an increase in conductivity of approximately 6 orders of magnitude compared to the unfilled PA6.
SponsorQatar National Research Fund - grant # [NPRP 5 - 039 - 2 - 014].
Languageen
PublisherRoyal Society of Chemistry
SubjectGraphene nanoplatelets
Mechanical and electrical properties
Electrical percolation
TitleMelt processing and characterisation of polyamide 6/graphene nanoplatelet composites
TypeArticle
Pagination52395-52409
Issue Number65
Volume Number5
dc.accessType Open Access


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