Compatibilizer Polarity Parameters as Tools for Predicting Organoclay Dispersion in Polyolefin Nanocomposites
Table 2
Parameters describing the compatibilizer polarity and characterizing the quality of the nanoclay dispersion.
Sample number
Compatibilizer type (Trade name)
Acid value (mg KOH/g)
Molar fraction of polar groups
Weight fraction of polar groups
Number of polymer chain units per polar group
Mole of polar groups per mole of compatibilizer (molpg/molcomp)
Degree of exfoliation (%)
1
PP-g-MA
11
0.0041
0.0096
121
11.76
78
2
PP-g-MA
14
0.0053
0.0122
95
7.61
72
3
PP-g-MA
6
0.0023
0.0052
222
17.64
79
4
PP-g-MA
52
0.0200
0.0454
26
13.90
58
5
PP-g-MA
52
0.0200
0.0454
26
13.90
57
6
PP-g-MA
26
0.0099
0.0227
51
9.27
72
7
PP-g-MA
11
0.0041
0.0096
121
8.63
74
8
PP-g-MA
11
0.0041
0.0096
121
9.39
75
9
SEBS-g-MA
20
—b
0.0176
—b
17.41
92
10
LLDPE-g-MA
9
0.0023
0.0079
222
10.02
100
11
LLDPE-g-MA
9
0.0023
0.0079
222
5.53
83
12
LLDPE-g-MA
9
0.0023
0.0079
222
16.04
86
13
PP-g-AA
46
0.0177
0.0402
29
66.61
64
14
PP-g-GMA
7
0.0053
0.0177
190
23.75
89
15
OxPE
16
—a
—a
125
3.69
75
16
OxPE
30
—a
—a
67
4.73
60
17
OxPE
42
—a
—a
48
6.29
74
aCould not be calculated because the nature and ratio of polar groups are not known. bCould not be calculated because the ratio of polymer units in the copolymer chain is not known.
