SPI-Chem™ Embedding Resin Kits
Materials science applications
Generally speaking, materials science samples, are either dry to begin with
or if not, they can be safely dried (and if necessary dehydrated) and
embedded. Examples of inherently "dry" samples that are routinely embedded
would be dry catalyst samples, pigment and other powders, small plastics or
pieces of plastic, polymer films and coatings, metal foils, just to name a
few. With very few exceptions the SPI-Chem™ SPI-Pon™ 812 resin is the
resin of choice.
If the sample has any porosity, it is generally wise to employ the
technique of vacuum embedding. One feature about this particular resin is
that the hardness can be varied through a range that is better than almost
any other resin available. For "hard" samples, that ability to "match" as
closely as possible the hardness of the resin with the hardness of the
sample not only can reduce the time needed to obtain good sections, it also
reduces the wear and tear on the diamond knife thereby reducing the
laboratory's operating costs as well.
Generally speaking, the group or resins requiring only a partial dehydration
are not used for materials science samples.
On occasion, however, there are some classes of materials science samples
that can not be dehydrated, one example being ultrafiltration membranes
(including kidney dialysis membrane tubes). Just about any effort at
dehydration will collapse the tiniest pores, which are the ones that one
generally wants to see. This is where the
SPI-Chem Low Acid GMA is often
times indicated.
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Saturday March 20, 2010
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