Accession Number:

ADA499615

Title:

Generating High Modulus Fibers by Nanoparticle Incorporation with Potential to Introduce Multifunctionality

Descriptive Note:

Final rept. 1 Jul 2005-30 Apr 2008

Corporate Author:

MICHIGAN STATE UNIV EAST LANSING CONTRACT AND GRANT ADMINISTRATION

Report Date:

2008-12-07

Pagination or Media Count:

15.0

Abstract:

The aim of this project is to develop the technology of stabilizing and controlling nanoparticle dispersion in polymers and in particular to apply this technology to the production of high modulus fibers which can be designed to have a variety of multifunctional capabilities. We have found that prestraining a glassy polymer polystyrene containing a very small amount 1 wt of well dispersed nanoparticles produces a material that has a larger or equivalent modulus, yet, is tougher than the virgin material by a factor of ten as measured by the energy to break. This technology may be used to enhance protective devices for the soldier that are stronger and tougher than present materials without deleterious cost or weight effects. Various nanoparticle types have been tested although presently it appears that a smaller size is most beneficial 5 nm. Small angle neutron scattering has been performed to determine how the nanoparticles and processing affect the polymer conformation which dictates the final materials properties. One of the most unusual findings is that nanoparticles make the material more compressible by introducing free volume, this was not anticipated.

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE