Type

Journal Article

Authors

Jonathan Coleman
Peter May
Umar Khan

Subjects

Engineering

Topics
boron nitride mechanical properties polymer nanoscience higher polymer composites strain drawing

Enhancing the mechanical properties of BN nanosheet-polymer composites by uniaxial drawing (2014)

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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Full list of authors on original publication

Jonathan Coleman, Peter May, Umar Khan

Experts in our system

1
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
2
Peter May
Trinity College Dublin
Total Publications: 27
 
3
Umar Khan
Trinity College Dublin
Total Publications: 37