Nanocomposites
Abstract
Direct reinforcement of composite materials is typically promoted through use of high aspect ratio, stiff inclusions whose interface is modified to mediate stress transfer. Here a markedly different mechanism, indirect reinforcement, is achieved through use of weakly-interacting, spherical nanoparticles. Mechanical property enhancement is achieved by nanoparticles introducing density fluctuations to affect the polymer packing near their interface. This results in two phenomena; first a lower bulk modulus is found meaning the material becomes more compressible. Secondly, the tensile modulus increases. The first phenomenon occurs (we think) because the nanoparticle is surrounded by a low density region. The second is due to high density regions surrounding the low density promoting a higher tensile modulus. We have considered many new nanoparticle systems and have had to take a very careful route to ensure the results we have obtained are not spurious. We reproduced most previous results conducted by a previous student in the group since some results were found to be at fault and are sure what we have now measured are correct. Several manuscripts are now in preparation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 10, 2013
- Accession Number
- ADA597164
Entities
People
- Michael E. Mackay
Organizations
- University of Delaware