Enhancing the mechanical properties of BN nanosheet-polymer composites by uniaxial drawing
Item Type:Journal Article
Citation: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, 4889-4895
Jan et al Nanoscale.pdf (Published (author's copy) - Peer Reviewed) 345.2Kb
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.
Science Foundation Ireland (SFI)
Type of material:Journal Article
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