Nanomechanical properties and nanoscale deformation of PDMS nanocomposites

Charitidis, CA; Koumoulos, EP

dc.contributor.author	Charitidis, CA	en
dc.contributor.author	Koumoulos, EP	en
dc.date.accessioned	2014-03-01T02:53:56Z
dc.date.available	2014-03-01T02:53:56Z
dc.date.issued	2012	en
dc.identifier.issn	14658011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36493
dc.subject	Elastomer	en
dc.subject	Nanoindentation	en
dc.subject	Nanomechanical properties	en
dc.subject	Polydimethylsiloxane	en
dc.subject.other	Contact areas	en
dc.subject.other	Indenters	en
dc.subject.other	Nano clays	en
dc.subject.other	Nano-scale deformation	en
dc.subject.other	Nanoclay concentrations	en
dc.subject.other	Nanoindentation techniques	en
dc.subject.other	Nanomechanical property	en
dc.subject.other	Organically modified montmorillonite	en
dc.subject.other	Polydimethylsiloxane PDMS	en
dc.subject.other	Soft polymers	en
dc.subject.other	Surface region	en
dc.subject.other	Clay minerals	en
dc.subject.other	Elastomers	en
dc.subject.other	Fourier transform infrared spectroscopy	en
dc.subject.other	Microchannels	en
dc.subject.other	Nanocomposites	en
dc.subject.other	Nanoindentation	en
dc.subject.other	Polydimethylsiloxane	en
dc.subject.other	Scanning probe microscopy	en
dc.subject.other	Tensile testing	en
dc.subject.other	X ray diffraction	en
dc.subject.other	Silicones	en
dc.title	Nanomechanical properties and nanoscale deformation of PDMS nanocomposites	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1179/1743289810Y.0000000037	en
heal.identifier.secondary	http://dx.doi.org/10.1179/1743289810Y.0000000037	en
heal.publicationDate	2012	en
heal.abstract	In this study, nanoindentation technique was utilised to estimate the nanomechanical properties (hardness H, and elastic modulus E) of elastomeric polydimethylsiloxane (PDMS) samples consisting of different nanoclay concentrations (organically modified montmorillonite), namely, 0, 5 and 8 parts per hundred. The PDMS samples were also characterised by Fourier transform infrared spectroscopy, X-ray diffraction and tensile testing. In addition, the surface of the nanocomposites was characterised through scanning probe microscopy, revealing surface modification with increasing nanoclay content in the PDMS matrix. Additionally, several analyses on nanoindentation data were performed, and the exact surface region (with higher values of H and E) was clearly defined. One key problem in using the Oliver and Pharr (O&P) method is the determination of the contact area between the indenter and the sample. It is believed that the contact area is underestimated using the O&P method and Hertzian analysis for soft polymers. Therefore, calculations using the O&P method and Hertzian analysis have been performed and compared. The change in H/E slope revealed that the addition of nanoclay amount strengthens the PDMS-montmorillonite nanocomposite. © Institute of Materials, Minerals and Mining 2012.	en
heal.journalName	Plastics, Rubber and Composites	en
dc.identifier.doi	10.1179/1743289810Y.0000000037	en
dc.identifier.volume	41	en
dc.identifier.issue	2	en
dc.identifier.spage	88	en
dc.identifier.epage	93	en