Chemistry Reference
In-Depth Information
Table 2.5 Typical changes in properties resulting from the modification of PHA
MCL
.
65
Modification
methods
Molecular weights
Thermal properties
Mechanical properties
Product
Tensile strength
(MPa)
Elongation at
break (%)
M
n
10
4
M
w
/M
n
T
g
(1C)
T
m
(1C)
Blending
PHO/PLA50
(80/20, w/w)
8.0/0.1
39.0/
10.0
49.0
Semi-IPN PHU/
PLGA (80/20, w/w)
5.0/5.0
1.1
205.0
B
B
41.7
B
42.3
B
B
B
Crosslinking
Radiation treated
PHA-tal
4.4
7.3
3.6
4.9
43.1
43.3
4.0
5.1
195.0
235.0
B
35.0
B
40.0
B
Gamma-ray treated
PHOU
1.1
8.2
49.0
59.0
Chemical
reaction
Chlorinated PHAs
1.0
B
2.0
1.3
B
1.7
2.0
B
58.0
104.0
B
134.0
Epoxidized PHAs
9.3
B
18.4
1.4
B
2.5
28.0
B
34.0
41
B
54
Grafting
PEG-grafted PHO
4.8
B
10.7
2.8
B
3.3
34.5
B
37.5
48.9
B
53.0
9.5
B
10.5
417.0
B
647.0
PMMA-grafted PHN
5.5
B
47.3
2.5
B
5.8
37.3
B
52.1
5.7
B
12.7
PEG-grafted PHU
0.2
B
0.4
379.0
B
621.0
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