Nanocomposites
9/10/2010
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“Nanocomposites can be defined as multiphase solid materials where one of
the phases has a dimension of less than 100 nanometres (nm): structures having
nanometre scale dimensional repeat distances between the different phases that
make up the material. In the broadest sense this definition can include porous
media, colloids, gels and copolymers, but is more usually taken to mean the
solid combination of nano-dimensional phases differing in properties due to
dissimilarities in structure and chemistry. The mechanical, electrical, optical,
electrochemical, catalytic properties of the nanocomposite will differ markedly
from that of the component materials. Size limits for these effects have been
proposed, <5nm for catalytic activity, <20nm for making a hard magnetic material
soft, <50nm for refractive index changes, and <100nm for achieving
superparamagnetism, mechanical strengthening or restricting matrix dislocation
movement.”
Wikipedia: http://en.wikipedia.org/wiki/Nanocomposite
(11/8/2008)
SPE Encyclopedia Current Awareness
Interpenetrating Networks (IPN)
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Roger D Corneliussen
Editor
Telephone: 610 363 9920
Fax: 610 363 9921
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cornelrd@bee.net
SPE Online Encyclopedia
www.maropolymeronline.com