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RE- Core forms
From: Robert Michaels[SMTP:robert.michaels-at-online.sme-dot-org]
Sent: Sunday, September 07, 1997 7:56 AM
To: tesla-at-pupman-dot-com
Subject: RE- Core forms
Most plastics can be identified by means of the Michaels Test
(on which subject I've posted before -- you mean you haven't
all memorized it by now?).
The Michaels Test (which I've named after myself - in full
professional modesty, of course) is predicated on pyrolytic
decomposition followed by organoleptic analysis. In other
words, you burn it and then sniff it.
Cut a sliver of the test specimen. Apply the flame of a
match or cigarette lighter to it until fumes arise. If the
specimen ignites, withdraw the match or lighter and blow
out the flame (on the specimen [and the match, too, for
that matter] ).
Now, sniff the smoke/fumes arising from the specimen.
With sufficient experience the aroma of the fumes will enable
immediate indentification. Lacking such experience, make an
A - B comparison with a sliver of known material.
The Michaels Test will not only indentify most polymers, but
also woods, papers, fibers/textiles and most such complex
polymeric substances.
The Test is not fully useful in distinguishing close homologs,
nor either can it discern molecular weights. Thus polyethylene
and polypropylene are difficult to distinguish. Likewise,
low-density polyethylene (LDPE) and high-density polyethylene
(HDPE).
Miffed, at the lack of
professional recognition
in -- Detroit, USA
Robert Michaels
T>Is anyone familiar with this PVC looking pipe that is used in large
T>construction. There is a lot of around in trash piles left over from
T>various jobs around town. Some are 8" to 12" in diameter and up to 5'
T>or 6' in length. The color is sort of turquoise if that helps. Or
T>maybe someone knows a way to test it.
T>Thanks
T>Russ
T>Russ Thornton
T>CSR 2040,
T>Building 989, Rm. A1-N20
T>Phone: (407) 494-6430
T>Email: thorntor-at-rs.pafb.af.mil