Enhancing the mechanical properties of BN nanosheet-polymer composites by uniaxial drawing
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2014Access:
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Jan, R, May, P, Bell, AP, Habib, A, Khan, U, Coleman, JN, Enhancing the mechanical properties of BN nanosheet-polymer composites by uniaxial drawing, NANOSCALE, 6, 9, 2014, 4889-4895Download Item:
Abstract:
We have used liquid exfoliation of hexagonal Boron-Nitride (BN) to prepare composites of BN nanosheets of three different sizes in polyvinylchloride matrices. These composites show low levels of reinforcement, consistent with poor alignment of the nanosheets as-described by a modified version of Halpin-Tsai theory. However, drawing of the composites to 300% strain results in a considerable increase in mechanical properties with the maximum composite modulus and strength both ∼×3 higher than that of the pristine polymer. In addition, the rate of increase of modulus with BN volume fraction was up to 3-fold larger than for the unstrained composites. This is higher than can be explained by drawing-induced alignment using Halpin-Tsai theory. However, the data was consistent with a combination of alignment and strain-induced de-aggregation of BN multilayers.
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Science Foundation Ireland (SFI)
03/CE3/M406s1
Author's Homepage:
http://people.tcd.ie/colemajhttp://people.tcd.ie/ukhan
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NANOSCALE6
9
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NanoscienceDOI:
http://dx.doi.org/10.1039/c3nr06711dISSN:
2040-3364Metadata
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