Type

Journal Article

Authors

Jonathan N Coleman
Alan H Windle
Juan J Vilatela
Arlene O'Neill
Peter May
Umar Khan

Subjects

Chemistry

Topics
elastomers helium mechanical phenomena chemistry stress mechanical viscosity cross linking reagents elastic modulus nanotubes carbon polyurethanes

Tuning the mechanical properties of composites from elastomeric to rigid thermoplastic by controlled addition of carbon nanotubes. (2010)

Abstract A commercial thermoplastic polyurethane is identified for which the addition of nanotubes dramatically improves its mechanical properties. Increasing the nanotube content from 0% to 40% results in an increase in modulus, Y, (0.4-2.2 GPa) and stress at 3% strain, σ(ϵ = 3%) , (10-50 MPa), no significant change in ultimate tensile strength, σ(B) , (≈50 MPa) and decreases in strain at break, ϵ(B) , (555-3%) and toughness, T, (177-1 MJ m(-3) ). This variation in properties spans the range from compliant and ductile, like an elastomer, at low mass fractions to stiff and brittle, like a rigid thermoplastic, at high nanotube content. For mid-range nanotube contents (≈15%) the material behaves like a rigid thermoplastic with large ductility: Y = 1.5 GPa, σ(ϵ = 3%) = 36 MPa, σ(B) = 55 MPa, ϵ(B) = 100% and T = 50 MJ m(-3) . Analysis suggests that soft polyurethane segments are immobilized by adsorption onto the nanotubes, resulting in large changes in mechanical properties.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Jonathan N Coleman, Alan H Windle, Juan J Vilatela, Arlene O'Neill, Peter May, Umar Khan

Experts in our system

1
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
2
Arlene O'Neill
Trinity College Dublin
Total Publications: 25
 
3
Peter May
Trinity College Dublin
Total Publications: 27
 
4
Umar Khan
Trinity College Dublin
Total Publications: 37