Appendix B
B–70 TA I
NSTRUMENTS
TGA 2950
Figure B.20
As can be seen by comparing the derivative of
weight loss curves in Figures B.19 and B.20, the
Hi-Res
TM
scan gives improved resolution in the
same time as the conventional scan. This is
possible because the Hi-Res
TM
TGA ramp heats
the taffy sample rapidly during baseline portions
of the scan and slowly during transitions,
resulting in an average heating rate of about
10
°
C/minute. A 200
°
C/minute Hi-Res
TM
scan of
this sample takes about the same time as a 20
°
C/
minute conventional scan while providing
resolution improvement similar to that observed
with the 50
°
C/minute Hi-Res
TM
scan.
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