Biomedical Engineering Reference
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Figure 1. Thermograms of crab chitosan obtained at three repeated heating cycles: (1) the first, (2) the
second, (3) the third.
Figure 2. Thermograms of block-copolymer of chitosan with methyl acrylate obtained at three repeated
heating cycles: (1) the first, (2) the second, (3) the third.
The mass of the specimen from the analyzed composition was determined based on the
amount of CO
2
formed during its combustion. The calculations were performed for the
following reaction of CHS combustion:
C
6
H
11
O
4
N (s) + 6.75 O
2
(g) → 6 СO
2
(g) + 5.5 Н
2
О(l) + 0.5 N
2
(g).
The energy of combustion of the analyzed substance
c
U was determined under the
conditions of a calorimetric bomb. The standard values of
c
U
о
and
с
Н
о
for the CHS
combustion reaction were calculated based on the average value of
c
U and the molar mass of
the CHS repeat unit, with the Washburn correction and the correction conditioned by
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