Chemistry Reference
In-Depth Information
Table 6.1 Effect of fiber content on cell thermal
degradation. Adapted from ref. 6 with
permission
r
Elsevier, 2011.
35-70 Mesh fiber/php
a
T
d5
/1C T
d50
/1C
0 254 429
10 258 429
20 256 439
30 260 437
40 262 437
50 265 468
60 274 467
a
php: per hundred parts. Generally, 100 parts refer to polyol.
Table 6.2 Effect of fiber particle size on cell thermal
degradation. Adapted from ref. 6 with
permission
r
Elsevier, 2011.
Fiber particle size/20 php
T
d5
/1C
T
d50
/1C
20-35
255
443
35-70
256
439
70-100
255
426
100-140
256
427
140-200
256
429
200-325
251
410
O
O
O
N
N
R
3
C
O
~~~~~~~
Urethane
segments
C
O
C
CH
2
CH
2
Carboxyl connection
Aliphatic hydroxyl connection
O
R
2
Urethane
segments
MeO
O
N
OMe
O
C
R
3
~~~~~~~
O
C
H
2
Aliphatic hydroxyl
connection
O
CH
Lignin blocks
O
CH
2
O
O
C=O
CH
2
CH
2
O
MeO
O
N
N
O
O
O
~
R
3
C
O
C
N
O
C
Urethane
segments
O
C
NH
R
3
~~~~~~~
R
3
~~~~
OMe
N
O
C
O
R
1
O
O
R
3
~~~~~~~
CH
Urethane segments
Phenol hydroxyl connection
O
Aliphatic hydroxyl connection
R
1
,R
2
,R
3
: Carbon chains/units
Figure 6.10 Reaction mechanism of isocyanates with a lignin block.
